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now returns a pointer to the entry in sectsizetab

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git-svn-id: svn://svn.cc65.org/cc65/trunk@383 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cpg 2000-10-18 23:51:29 +00:00
parent 6b6e282283
commit 2690dfc172
1 changed files with 45 additions and 10 deletions
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55
libsrc/atari/diopncls.s
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@ -3,44 +3,79 @@
;
; This file provides the __dio_open and __dio_close functions
; Since on the Atari no real open and close is necessary, they
; do not much. The __dio_open queries the sector size of the
; do not much. The __dio_open sets the sector size of the
; drive which is later used by the _dio_read and _dio_write
; functions.
;
; unsigned char __fastcall__ _dio_open (_driveid_t drive_id);
; unsigned char __fastcall__ _dio_close (_driveid_t drive_id);
; _dhandle_t __fastcall__ _dio_open (_driveid_t drive_id);
; unsigned char __fastcall__ _dio_close (_dhandle_t handle);
;
.export __dio_open,__dio_close
.export sectsizetab
.import __oserror
.importzp ptr1,tmp1
.include "atari.inc"
.bss
sectsizetab:
.res NUMDRVS * 2
.res NUMDRVS * sst_size
.code
.proc __dio_open
asl a ; make index from drive id
cmp #NUMDRVS ; valid drive id?
bcs _inv_drive
tay ; drive #
asl a ; make index from drive id
asl a
tax
lda #128 ; currently hardcoded (until I get an 815 :-)
sta sectsizetab,x
lda #128 ; currently hardcoded (until I get an 815 :-)
sta sectsizetab+sst_sectsize,x
sta sectsizetab+sst_flag,x ; set flag that drive is "open"
lda #0
sta sectsizetab+1,x
sta sectsizetab+sst_sectsize+1,x
sta __oserror ; success
tya
sta sectsizetab+sst_driveno,x
; lda #SSTIDVAL
; sta sectsizetab+sst_id+1,x
stx tmp1
lda #<sectsizetab
clc
adc tmp1
sta tmp1
lda #>sectsizetab
adc #0
tax
lda tmp1
rts
; fall thru to __dio_close
_inv_drive:
lda #NONDEV ; non-existent device
sta __oserror
lda #0
tax
rts ; return NULL
.endproc
.proc __dio_close
sta ptr1
stx ptr1+1
lda #0
ldy #sst_flag
sta (ptr1),y
; ldy #sst_id
; sta (ptr1),y
sta __oserror ; success
tax
rts ; return no error
rts ; return no error
.endproc