66 lines
1.9 KiB
ArmAsm
66 lines
1.9 KiB
ArmAsm
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; Default mouse callbacks for the CX16
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; 2019-11-09, Greg King
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;
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; All functions in this module should be interrupt safe
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; because they might be called from an interrupt handler.
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;
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.export _mouse_def_callbacks
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.include "cbm_kernal.inc"
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.include "cx16.inc"
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; --------------------------------------------------------------------------
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; Hide the mouse pointer. Always called with interrupts disabled.
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.code
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hide: ldx #$00 ; Don't change sprite's scale
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lda #$00 ; Disable sprite
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jmp MOUSE
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; --------------------------------------------------------------------------
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; Show the mouse pointer. Always called with interrupts disabled.
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show: ldx #$00
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lda #<-$01 ; Enable sprite
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jmp MOUSE
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; --------------------------------------------------------------------------
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; Prepare to move the mouse pointer. Always called with interrupts disabled.
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prep: ; Fall through
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; --------------------------------------------------------------------------
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; Draw the mouse pointer. Always called with interrupts disabled.
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draw: ; Fall through
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; --------------------------------------------------------------------------
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; Move the mouse pointer X position to the value in .XA . Always called with
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; interrupts disabled.
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movex: ; Already set by drivers
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; Fall through
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; --------------------------------------------------------------------------
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; Move the mouse pointer Y position to the value in .XA . Always called with
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; interrupts disabled.
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movey: rts ; Already set by drivers
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; --------------------------------------------------------------------------
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; Callback structure
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.rodata
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_mouse_def_callbacks:
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.addr hide
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.addr show
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.addr prep
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.addr draw
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.addr movex
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.addr movey
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