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cc65/libsrc/pet/kbrepeat.s

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ArmAsm
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;
; unsigned char __fastcall__ kbrepeat (unsigned char mode);
;
; 2017-06-16, Groepaz
; 2017-09-05, Greg King
;
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.export _kbrepeat
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.include "pet.inc"
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_kbrepeat:
ldx #>$0000
ldy SCR_LINELEN
cpy #40 + 1
bcc L1 ; branch if screen is 40 columns wide
ldy KBDREPEAT80 ; get old value
sta KBDREPEAT80 ; store new value
tya ; return old value
rts
L1: tay
lda KBDREPEAT40B ; get REPEAT-key flag (used by some editor ROMs)
lsr a ; move bit 0 into bit 7
ror a
ora KBDREPEAT40 ; combine with old key-REPEAT flags
sty KBDREPEAT40
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rts