Added condes IRQ routines and a README file.
Made k_blncur a condes IRQ routine and moved it to cgetc.s. Added mouse and joystick routines. git-svn-id: svn://svn.cc65.org/cc65/trunk@951 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
parent
2ffb744316
commit
e12444824f
8 changed files with 681 additions and 108 deletions
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@ -21,13 +21,14 @@ OBJS = _scrsize.o \
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cputc.o \
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crt0.o \
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kbhit.o \
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kblncur.o \
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kirq.o \
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kplot.o \
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kscnkey.o \
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kudtim.o \
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mouse.o \
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peeksys.o \
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pokesys.o \
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readjoy.o \
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rs232.o
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all: $(OBJS)
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8
libsrc/cbm510/README
Normal file
8
libsrc/cbm510/README
Normal file
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@ -0,0 +1,8 @@
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Implementation notes:
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CONDES routines with a type code of 2 are used to implement interrupt
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handlers. Note that these are called as soon as the program is started,
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so they have to cope with this. The indirect segment is set to the
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system bank when calling interrupt routines, this must must not be changed
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when returning.
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@ -5,6 +5,7 @@
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;
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.export _cgetc
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.condes k_blncur, 2
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.import cursor
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.include "zeropage.inc"
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@ -90,6 +91,61 @@ L4: lda KeyBuf+1,x ; Move up the remaining chars
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@L9: sty CURS_FLAG ; Cursor on (Y = 0)
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rts
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.endproc
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; ------------------------------------------------------------------------
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; Blink the cursor in the interrupt. A blinking cursor is only available if
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; we use the cgetc() function, so we will export this IRQ handler only in
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; case the module is included into a program.
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.proc k_blncur
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lda CURS_FLAG ; Is the cursor on?
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bne curend ; Jump if not
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dec CURS_BLINK
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bne curend
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; Re-initialize the blink counter
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lda #20 ; Initial value
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sta CURS_BLINK
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; Load Y with the cursor X coordinate
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ldy CURS_X
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; Check if the cursor state was on or off before
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lda CURS_COLOR ; Load color behind cursor
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lsr CURS_STATE ; Cursor currently displayed?
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bcs curset ; Jump if yes
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; Cursor was off before, switch it on
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inc CURS_STATE ; Mark as displayed
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lda (CRAM_PTR),y ; Get color behind cursor...
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sta CURS_COLOR ; ...and remember it
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lda CHARCOLOR ; Use character color
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; Set the cursor with color in A
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curset: sta (CRAM_PTR),y ; Store cursor color
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lda ExecReg
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sta IndReg ; Switch to our segment
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lda (SCREEN_PTR),y
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eor #$80 ; Toggle reverse flag
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sta (SCREEN_PTR),y
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; Switch back to the system bank
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lda #$0F
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sta IndReg
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curend: rts
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.endproc
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@ -63,58 +63,50 @@ VIC_BG_COLOR3 = $24
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; I/O $da00: SID 6581
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; sid = $da00
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SID_S1Lo = $00
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SID_S1Hi = $01
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SID_PB1Lo = $02
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SID_PB1Hi = $03
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SID_Ctl1 = $04
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SID_AD1 = $05
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SID_SUR1 = $06
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Osc1 = $00
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Osc2 = $07
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Osc3 = $0e
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SID_S2Lo = $07
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SID_S2Hi = $08
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SID_PB2Lo = $09
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SID_PB2Hi = $0A
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SID_Ctl2 = $0B
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SID_AD2 = $0C
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SID_SUR2 = $0D
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FreqLo = $00
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FreqHi = $01
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PulseF = $02
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PulseC = $03
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OscCtl = $04
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AtkDcy = $05
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SusRel = $06
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FiCtlLo = $15
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FiCtlHi = $16
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Resonance = $17
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Volume = $18
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PotX = $19
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PotY = $1A
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Random = $1B
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Env3 = $1C
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SID_S3Lo = $0E
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SID_S3Hi = $0F
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SID_PB3Lo = $10
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SID_PB3Hi = $11
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SID_Ctl3 = $12
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SID_AD3 = $13
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SID_SUR3 = $14
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SID_FltLo = $15
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SID_FltHi = $16
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SID_FltCtl = $17
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SID_Amp = $18
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SID_ADConv1 = $19
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SID_ADConv2 = $1A
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SID_Noise = $1B
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SID_Read3 = $1C
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; I/O $db00: CIA 6526 Inter Process Communication
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; IPCcia = $db00
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PortA = $00
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PortB = $01
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DDRA = $02
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DDRB = $03
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TimALo = $04
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TimAHi = $05
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TimBLo = $06
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TimBHi = $07
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TOD10 = $08
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TODsec = $09
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TODmin = $0A
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TODhour = $0B
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SerDataReg = $0C
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IntCtrReg = $0D
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CtrlA = $0E
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CtrlB = $0F
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; I/O $dc00: CIA 6526
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; cia = $dc00
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CIA_PRA = $00
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CIA_PRB = $01
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CIA_DDRA = $02
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CIA_DDRB = $03
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CIA_ICR = $0D
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CIA_CRA = $0E
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CIA_CRB = $0F
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; I/O $dd00: ACIA 6551
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@ -1,56 +0,0 @@
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;
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; Ullrich von Bassewitz, 16.09.2001
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;
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.export k_blncur
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.include "zeropage.inc"
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; ------------------------------------------------------------------------
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; Blink the cursor in the interrupt
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.proc k_blncur
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lda CURS_FLAG ; Is the cursor on?
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bne curend ; Jump if not
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dec CURS_BLINK
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bne curend
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; Re-initialize the blink counter
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lda #20 ; Initial value
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sta CURS_BLINK
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; Switch to the system bank, load Y with the cursor X coordinate
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lda #$0F
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sta IndReg ; Access system bank
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ldy CURS_X
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; Check if the cursor state was on or off before
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lda CURS_COLOR ; Load color behind cursor
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lsr CURS_STATE ; Cursor currently displayed?
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bcs curset ; Jump if yes
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; Cursor was off before, switch it on
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inc CURS_STATE ; Mark as displayed
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lda (CRAM_PTR),y ; Get color behind cursor...
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sta CURS_COLOR ; ...and remember it
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lda CHARCOLOR ; Use character color
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; Set the cursor with color in A
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curset: sta (CRAM_PTR),y ; Store cursor color
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lda ExecReg
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sta IndReg ; Switch to our segment
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lda (SCREEN_PTR),y
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eor #$80 ; Toggle reverse flag
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sta (SCREEN_PTR),y
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curend: rts
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.endproc
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@ -5,7 +5,9 @@
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;
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.export irq, nmi, k_irq, k_nmi
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.import k_blncur, k_scnkey, k_udtim, k_rs232
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.import k_scnkey, k_udtim, k_rs232
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.import condes
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.import __IRQFUNC_TABLE__, __IRQFUNC_COUNT__
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.importzp tpi1
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.include "zeropage.inc"
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@ -40,7 +42,7 @@
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and #$10 ; Test break flag
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bne L1
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jmp (IRQVec)
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L1: jmp (BRKVec)
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L1: jmp (BRKVec)
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.endproc
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@ -70,16 +72,26 @@ k_irq:
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; -------------------------------------------------------------------------
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; 50/60Hz interrupt
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cmp #%00000001 ; ticker irq?
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cmp #%00000001 ; ticker irq?
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bne irq1
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jsr k_blncur ; Blink the cursor
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jsr k_scnkey ; Poll the keyboard
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jsr k_udtim ; Bump the time
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; Call user IRQ handlers if we have any
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ldy #<(__IRQFUNC_COUNT__*2)
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beq @L1
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lda #<__IRQFUNC_TABLE__
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ldx #>__IRQFUNC_TABLE__
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jsr condes ; Call the functions
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; Call replacement kernal IRQ routines
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@L1: jsr k_scnkey ; Poll the keyboard
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jsr k_udtim ; Bump the time
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; -------------------------------------------------------------------------
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; UART interrupt
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irq1: cmp #%00010000 ; interrupt from uart?
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irq1: cmp #%00010000 ; interrupt from uart?
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bne irqend
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jsr k_rs232 ; Read character from uart
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498
libsrc/cbm510/mouse.s
Normal file
498
libsrc/cbm510/mouse.s
Normal file
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@ -0,0 +1,498 @@
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;
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; Ullrich von Bassewitz, 19.09.2001
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;
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; Routines for the 1351 proportional mouse. Parts of the code are from
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; the Commodore 1351 mouse users guide.
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;
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.export _mouse_init, _mouse_done
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.export _mouse_hide, _mouse_show
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.export _mouse_box, _mouse_info
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.export _mouse_move, _mouse_pos
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.export _mouse_buttons, _mouse_info
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.condes MouseIRQ, 2
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.import _readjoy
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.import sys_bank, restore_bank
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.import popax, addysp1
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.importzp vic, sid, ptr1, sp
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.include "zeropage.inc"
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.include "io.inc"
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.macpack generic
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.code
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; --------------------------------------------------------------------------
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;
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; Constants
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;
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SPRITE_HEIGHT = 21
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SPRITE_WIDTH = 24
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SCREEN_HEIGHT = 200
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SCREEN_WIDTH = 320
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XCORR = SPRITE_WIDTH
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; --------------------------------------------------------------------------
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;
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; unsigned char __fastcall__ mouse_init (unsigned char type);
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;
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.proc _mouse_init
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lda Initialized ; Already initialized?
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bne AlreadyInitialized ; Jump if yes
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; Initialize variables
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ldx #0
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lda #XCORR
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sta XPos
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stx XPos+1
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stx YPos
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stx YPos+1
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stx OldPotX
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stx OldPotY
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stx XMin
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stx XMin+1 ; XMin = 0
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lda #50 ; ## FIXME: This is the PAL value
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sta YCorr
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sta YPos
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stx YPos+1
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sec
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sbc #SPRITE_HEIGHT ; Sprite height in pixels
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sta YMin
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stx YMin+1 ; YMin = 29
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lda #SCREEN_HEIGHT ; Vertical screen res
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add YCorr ; Add correction factor
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sta YMax
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stx YMax+1
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inx ; X = 1
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stx Invisible ; Mouse *not* visible
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lda #<(SCREEN_WIDTH + SPRITE_WIDTH)
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sta XMax
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stx XMax+1 ; XMax = 320 + sprite width
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; Mouse successfully initialized
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lda #1
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sta Initialized
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rts
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AlreadyInitialized:
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lda #0 ; Error
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rts
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.endproc
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; --------------------------------------------------------------------------
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;
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; void mouse_done (void);
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;
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_mouse_done:
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lda #0
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sta Initialized ; Reset the initialized flag
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; Disable the mouse sprite
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DisableSprite:
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ldx IndReg
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lda #$0F
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sta IndReg ; Switch to the system bank
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ldy #VIC_SPR_ENA
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sei ; Disable interrupts
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lda (vic),y
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and #$FE ; Clear bit for sprite #0
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sta (vic),y ; Disable sprite
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cli ; Enable interrupts
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stx IndReg ; Switch back the segment
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rts
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; --------------------------------------------------------------------------
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;
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; void mouse_hide (void);
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;
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.proc _mouse_hide
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lda Invisible ; Get the flag
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bne @L1 ; Jump if already invisible
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jsr DisableSprite ; Disabe the mouse sprite
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@L1: inc Invisible ; Set the flag to invisible
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rts
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.endproc
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; --------------------------------------------------------------------------
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;
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; void mouse_show (void);
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;
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.proc _mouse_show
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lda Invisible ; Mouse invisible?
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beq @L1 ; Jump if no
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dec Invisible ; Set the flag
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bne @L1 ; Jump if still invisible
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jsr sys_bank ; Switch to the system bank
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sei ; Disable interrupts
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jsr MoveSprite1 ; Move the sprite to it's position
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ldy #VIC_SPR_ENA
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lda (vic),y ; Get sprite enable register
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ora #$01 ; Enable sprite #0
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sta (vic),y ; Write back
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cli ; Enable interrupts
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jsr restore_bank ; Switch back the bank
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@L1: rts
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.endproc
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; --------------------------------------------------------------------------
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;
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; void __fastcall__ mouse_box (int minx, int miny, int maxx, int maxy);
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;
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.proc _mouse_box
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ldy #0 ; Stack offset
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add YCorr ; Adjust the Y value
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bcc @L1
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inx
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clc
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@L1: sei ; Disable interrupts
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sta YMax
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stx YMax+1 ; maxy
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lda (sp),y
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adc #XCORR
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sta XMax
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iny
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lda (sp),y
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adc #$00
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sta XMax+1 ; maxx
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iny
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lda (sp),y
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add YCorr
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sta YMin
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iny
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lda (sp),y
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adc #$00
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sta YMin+1 ; miny
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iny
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lda (sp),y
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add #XCORR
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sta XMin
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iny
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lda (sp),y
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adc #$00
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sta XMin+1 ; minx
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cli ; Enable interrupts
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jmp addysp1 ; Drop params, return
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.endproc
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; --------------------------------------------------------------------------
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;
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; void __fastcall__ mouse_pos (struct mouse_pos* pos);
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; /* Return the current mouse position */
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;
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.proc _mouse_pos
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sta ptr1
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stx ptr1+1 ; Remember the argument pointer
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ldy #0 ; Structure offset
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sec ; Needed for the SBC later
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sei ; Disable interrupts
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lda XPos ; Transfer the position
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sbc #XCORR
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sta (ptr1),y
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lda XPos+1
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sbc #$00
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iny
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sta (ptr1),y
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lda YPos
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ldx YPos+1
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cli ; Restore initial interrupt state
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sub YCorr ; Apply the Y correction value
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bcs @L1
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dex
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@L1: iny
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sta (ptr1),y ; Store YPos
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txa
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iny
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sta (ptr1),y
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rts ; Done
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.endproc
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; --------------------------------------------------------------------------
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;
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; void __fastcall__ mouse_info (struct mouse_info* info);
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; /* Return the state of the mouse buttons and the position of the mouse */
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;
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.proc _mouse_info
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; We're cheating here to keep the code smaller: The first fields of the
|
||||
; mouse_info struct are identical to the mouse_pos struct, so we will just
|
||||
; call _mouse_pos to initialize the struct pointer and fill the position
|
||||
; fields.
|
||||
|
||||
jsr _mouse_pos
|
||||
|
||||
; Fill in the button state
|
||||
|
||||
jsr _mouse_buttons ; Will not touch ptr1
|
||||
ldy #4
|
||||
sta (ptr1),y
|
||||
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; void __fastcall__ mouse_move (int x, int y);
|
||||
;
|
||||
|
||||
.proc _mouse_move
|
||||
|
||||
add YCorr ; Add Y coordinate correction
|
||||
bcc @L1
|
||||
inx
|
||||
clc
|
||||
@L1: sei
|
||||
sta YPos
|
||||
stx YPos+1
|
||||
cli
|
||||
|
||||
jsr popax ; Get X
|
||||
adc #XCORR ; Adjust X coordinate
|
||||
bcc @L2
|
||||
inx
|
||||
@L2: jsr sys_bank
|
||||
sei
|
||||
sta XPos
|
||||
stx XPos+1 ; Set new position
|
||||
jsr MoveSprite ; Move the sprite to the mouse pos
|
||||
cli ; Enable interrupts
|
||||
jsr restore_bank
|
||||
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; unsigned char mouse_buttons (void);
|
||||
;
|
||||
|
||||
.proc _mouse_buttons
|
||||
|
||||
lda #$00 ; Use port #0
|
||||
jmp _readjoy ; Same as joystick
|
||||
|
||||
.endproc
|
||||
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; Mouse interrupt handler
|
||||
;
|
||||
|
||||
IRQDone:rts
|
||||
|
||||
MouseIRQ:
|
||||
lda Initialized ; Mouse initialized?
|
||||
beq IRQDone ; Jump if no
|
||||
|
||||
ldy #SID_ADConv1
|
||||
lda (sid),y ; Get mouse X movement
|
||||
ldy OldPotX
|
||||
jsr MoveCheck ; Calculate movement vector
|
||||
sty OldPotX
|
||||
|
||||
; Calculate the new X coordinate (--> a/y)
|
||||
|
||||
add XPos
|
||||
tay ; Remember low byte
|
||||
txa
|
||||
adc XPos+1
|
||||
tax
|
||||
|
||||
; Limit the X coordinate to the bounding box
|
||||
|
||||
cpy XMin
|
||||
sbc XMin+1
|
||||
bpl @L1
|
||||
ldy XMin
|
||||
ldx XMin+1
|
||||
jmp @L2
|
||||
@L1: txa
|
||||
|
||||
cpy XMax
|
||||
sbc XMax+1
|
||||
bmi @L2
|
||||
ldy XMax
|
||||
ldx XMax+1
|
||||
@L2: sty XPos
|
||||
stx XPos+1
|
||||
|
||||
; Calculate the Y movement vector
|
||||
|
||||
ldy #SID_ADConv2
|
||||
lda (sid),y ; Get mouse Y movement
|
||||
ldy OldPotY
|
||||
jsr MoveCheck ; Calculate movement
|
||||
sty OldPotY
|
||||
|
||||
; Calculate the new Y coordinate (--> a/y)
|
||||
|
||||
sta OldValue
|
||||
lda YPos
|
||||
sub OldValue
|
||||
tay
|
||||
stx OldValue
|
||||
lda YPos+1
|
||||
sbc OldValue
|
||||
tax
|
||||
|
||||
cpy YMin
|
||||
sbc YMin+1
|
||||
bpl @L3
|
||||
ldy YMin
|
||||
ldx YMin+1
|
||||
jmp @L4
|
||||
@L3: txa
|
||||
|
||||
cpy YMax
|
||||
sbc YMax+1
|
||||
bmi @L4
|
||||
ldy YMax
|
||||
ldx YMax+1
|
||||
@L4: sty YPos
|
||||
stx YPos+1
|
||||
|
||||
; Move the mouse sprite to the current mouse position. Must be called
|
||||
; with interrupts off and the system bank enabled. MoveSprite1 is an entry
|
||||
; without checking.
|
||||
|
||||
MoveSprite:
|
||||
|
||||
lda Invisible ; Mouse visible?
|
||||
bne Done ; Jump if no
|
||||
|
||||
; Set the high X bit
|
||||
|
||||
MoveSprite1:
|
||||
ldy #VIC_SPR_HI_X
|
||||
lda (vic),y ; Get high X bits of all sprites
|
||||
and #$FE ; Clear bit for sprite #0
|
||||
ldx XPos+1 ; Test Y position
|
||||
beq @L5
|
||||
ora #$01 ; Set high X bit
|
||||
@L5: sta (vic),y ; Set hi X sprite values
|
||||
|
||||
; Set the low X byte
|
||||
|
||||
lda XPos
|
||||
ldy #VIC_SPR0_X
|
||||
sta (vic),y ; Set low byte
|
||||
|
||||
; Set the Y position
|
||||
|
||||
ldy YPos+1 ; Negative or too large?
|
||||
bne Done ; Jump if yes
|
||||
lda YPos
|
||||
ldy #VIC_SPR0_Y
|
||||
sta (vic),y ; Set Y position
|
||||
|
||||
; Done
|
||||
|
||||
Done: rts
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; Move check routine, called for both coordinates.
|
||||
;
|
||||
; Entry: y = old value of pot register
|
||||
; a = current value of pot register
|
||||
; Exit: y = value to use for old value
|
||||
; x/a = delta value for position
|
||||
;
|
||||
|
||||
.proc MoveCheck
|
||||
|
||||
sty OldValue
|
||||
sta NewValue
|
||||
ldx #$00
|
||||
|
||||
sub OldValue ; a = mod64 (new - old)
|
||||
and #%01111111
|
||||
cmp #%01000000 ; if (a > 0)
|
||||
bcs @L1 ;
|
||||
lsr a ; a /= 2;
|
||||
beq @L2 ; if (a != 0)
|
||||
ldy NewValue ; y = NewValue
|
||||
rts ; return
|
||||
|
||||
@L1: ora #%11000000 ; else or in high order bits
|
||||
cmp #$FF ; if (a != -1)
|
||||
beq @L2
|
||||
sec
|
||||
ror a ; a /= 2
|
||||
dex ; high byte = -1 (X = $FF)
|
||||
ldy NewValue
|
||||
rts
|
||||
|
||||
@L2: txa ; A = $00
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
; Data
|
||||
|
||||
.bss
|
||||
|
||||
Initialized: .res 1 ; True if mouse initialized
|
||||
OldInitStatus: .res 1 ; Old IRQ flag value
|
||||
OldValue: .res 1 ; Temp for MoveCheck routine
|
||||
NewValue: .res 1 ; Temp for MoveCheck routine
|
||||
YCorr: .res 1 ; Correction for Y coordinate
|
||||
|
||||
Invisible: .res 1 ; Is the mouse invisible?
|
||||
OldPotX: .res 1 ; Old hw counter values
|
||||
OldPotY: .res 1
|
||||
|
||||
XPos: .res 2 ; Current mouse position, X
|
||||
YPos: .res 2 ; Current mouse position, Y
|
||||
|
||||
XMin: .res 2 ; X1 value of bounding box
|
||||
YMin: .res 2 ; Y1 value of bounding box
|
||||
XMax: .res 2 ; X2 value of bounding box
|
||||
YMax: .res 2 ; Y2 value of bounding box
|
||||
|
||||
|
||||
62
libsrc/cbm510/readjoy.s
Normal file
62
libsrc/cbm510/readjoy.s
Normal file
|
|
@ -0,0 +1,62 @@
|
|||
;
|
||||
; Ullrich von Bassewitz, 23.09.1998
|
||||
;
|
||||
; unsigned readjoy (unsigned char joy);
|
||||
;
|
||||
|
||||
.export _readjoy
|
||||
.import sys_bank, restore_bank
|
||||
.importzp cia2, tmp1
|
||||
|
||||
.include "io.inc"
|
||||
|
||||
; ------------------------------------------------------------------------
|
||||
; unsigned __fastcall__ readjoy (unsigned char joy);
|
||||
|
||||
|
||||
.proc _readjoy
|
||||
|
||||
jsr sys_bank ; Switch to the system bank
|
||||
tax ; Save joystick number
|
||||
|
||||
; Get the direction bits
|
||||
|
||||
ldy #CIA_PRB
|
||||
lda (cia2),y ; Read joystick inputs
|
||||
sta tmp1
|
||||
|
||||
; Get the fire bits
|
||||
|
||||
ldy #CIA_PRA
|
||||
lda (cia2),y
|
||||
|
||||
; Make the result value
|
||||
|
||||
cpx #$00 ; Joystick 0?
|
||||
bne @L1 ; Jump if no
|
||||
|
||||
; Joystick 1, fire is in bit 6, direction in bit 0-3
|
||||
|
||||
asl a
|
||||
jmp @L2
|
||||
|
||||
; Joystick 2, fire is in bit 7, direction in bit 5-7
|
||||
|
||||
@L1: ldy #$00 ; High byte of return value
|
||||
lsr tmp1
|
||||
lsr tmp1
|
||||
lsr tmp1
|
||||
lsr tmp1
|
||||
|
||||
; Mask the relavant bits, get the fire bit
|
||||
|
||||
@L2: asl a ; Fire bit into carry
|
||||
lda tmp1
|
||||
and #$0F
|
||||
bcc @L3
|
||||
ora #$10
|
||||
@L3: eor #$1F ; All bits are inverted
|
||||
jmp restore_bank
|
||||
|
||||
.endproc
|
||||
|
||||
Loading…
Add table
Reference in a new issue