Posted By
Harry Potter
on 2022-07-12
17:10:03
|  Re: Harry Potter CC65 Thread
Hi, again! I am having a problem with my MemBankP4 library: the getkey() function isn't working properly: the screen keeps refreshing, as if I keep pressing a key, then, when I press a key, I get a JAM execution error at $0004. Following is the gertkey.s code:
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.segment "LOWCODE"
.proc _getkey
sta ENABLE_ROM
@lp:
;inc $0C00
jsr $ffe4 ;Call the getin kernal routine to
;lda #$E4
;jsr callkernal
;get the key-press.
cmp #0 ;Continue until key pressed.
beq @lp
ldx #0 ;Clear MSB because I keep seeing
;this done in cc65's source code.
;sta $C00
sta ENABLE_RAM
rts ;Return.
.endproc
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BTW, I'm testing on WinVice 3.0.
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