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cc65/libsrc/c16/readjoy.s
cuz e41c0adbb2 New target c16
git-svn-id: svn://svn.cc65.org/cc65/trunk@1563 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-11-21 21:22:26 +00:00

30 lines
403 B
ArmAsm

;
; Ullrich von Bassewitz, 23.09.1998
;
; unsigned readjoy (unsigned char joy);
;
.export _readjoy
.include "../plus4/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