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cc65/libsrc/plus4/readjoy.s
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30 lines
394 B
ArmAsm

;
; Ullrich von Bassewitz, 23.09.1998
;
; unsigned readjoy (unsigned char joy);
;
.export _readjoy
.include "plus4.inc"
.proc _readjoy
ldy #$FA ; Load index for joystick #1
tax ; Test joystick number
beq L1
ldy #$FB ; Load index for joystick #2
L1: sei
sty TED_KBD
lda TED_KBD
cli
ldx #$00 ; Clear high byte
and #$1F
eor #$1F
rts
.endproc