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cc65/libsrc/sym1/bitio.s
2021-05-09 16:34:53 -05:00

231 lines
9.1 KiB
ArmAsm

; ---------------------------------------------------------------------------
; bitio.s
;
; for Sym-1
;
; Wayne Parham
;
; wayne@parhamdata.com
; ---------------------------------------------------------------------------
.include "sym1.inc"
.export _set_DDR1A, _get_DDR1A, _set_IOR1A, _get_IOR1A
.export _set_DDR1B, _get_DDR1B, _set_IOR1B, _get_IOR1B
.export _set_DDR2A, _get_DDR2A, _set_IOR2A, _get_IOR2A
.export _set_DDR2B, _get_DDR2B, _set_IOR2B, _get_IOR2B
.export _set_DDR3A, _get_DDR3A, _set_IOR3A, _get_IOR3A
.export _set_DDR3B, _get_DDR3B, _set_IOR3B, _get_IOR3B
.segment "CODE"
.proc _set_DDR1A: near
; ---------------------------------------------------------------------------
sta DDR1A ; Write data direction register for port 1A
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_DDR1A: near
; ---------------------------------------------------------------------------
lda DDR1A ; Read data direction register for port 1A
ldx #$00 ;
rts ; Return DDR1A
; ---------------------------------------------------------------------------
.endproc
.proc _set_IOR1A: near
; ---------------------------------------------------------------------------
sta OR1A ; Write I/O register for port 1A
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_IOR1A: near
; ---------------------------------------------------------------------------
lda OR1A ; Read I/O register for port 1A
ldx #$00 ;
rts ; Return OR1A
; ---------------------------------------------------------------------------
.endproc
.proc _set_DDR1B: near
; ---------------------------------------------------------------------------
sta DDR1B ; Write data direction register for port 1B
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_DDR1B: near
; ---------------------------------------------------------------------------
lda DDR1B ; Read data direction register for port 1B
ldx #$00 ;
rts ; Return DDR1B
; ---------------------------------------------------------------------------
.endproc
.proc _set_IOR1B: near
; ---------------------------------------------------------------------------
sta OR1B ; Write I/O register for port 1B
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_IOR1B: near
; ---------------------------------------------------------------------------
lda OR1B ; Read I/O register for port 1B
ldx #$00 ;
rts ; Return OR1B
; ---------------------------------------------------------------------------
.endproc
.proc _set_DDR2A: near
; ---------------------------------------------------------------------------
sta DDR2A ; Write data direction register for port 2A
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_DDR2A: near
; ---------------------------------------------------------------------------
lda DDR2A ; Read data direction register for port 2A
ldx #$00 ;
rts ; Return DDR2A
; ---------------------------------------------------------------------------
.endproc
.proc _set_IOR2A: near
; ---------------------------------------------------------------------------
sta OR2A ; Write I/O register for port 2A
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_IOR2A: near
; ---------------------------------------------------------------------------
lda OR2A ; Read I/O register for port 2A
ldx #$00 ;
rts ; Return OR2A
; ---------------------------------------------------------------------------
.endproc
.proc _set_DDR2B: near
; ---------------------------------------------------------------------------
sta DDR2B ; Write data direction register for port 2B
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_DDR2B: near
; ---------------------------------------------------------------------------
lda DDR2B ; Read data direction register for port 2B
ldx #$00 ;
rts ; Return DDR2B
; ---------------------------------------------------------------------------
.endproc
.proc _set_IOR2B: near
; ---------------------------------------------------------------------------
sta OR2B ; Write I/O register for port 2B
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_IOR2B: near
; ---------------------------------------------------------------------------
lda OR2B ; Read I/O register for port 2B
ldx #$00 ;
rts ; Return OR2B
; ---------------------------------------------------------------------------
.endproc
.proc _set_DDR3A: near
; ---------------------------------------------------------------------------
sta DDR3A ; Write data direction register for port 3A
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_DDR3A: near
; ---------------------------------------------------------------------------
lda DDR3A ; Read data direction register for port 3A
ldx #$00 ;
rts ; Return DDR3A
; ---------------------------------------------------------------------------
.endproc
.proc _set_IOR3A: near
; ---------------------------------------------------------------------------
sta OR3A ; Write I/O register for port 3A
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_IOR3A: near
; ---------------------------------------------------------------------------
lda OR3A ; Read I/O register for port 3A
ldx #$00 ;
rts ; Return OR3A
; ---------------------------------------------------------------------------
.endproc
.proc _set_DDR3B: near
; ---------------------------------------------------------------------------
sta DDR3B ; Write data direction register for port 3B
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_DDR3B: near
; ---------------------------------------------------------------------------
lda DDR3B ; Read data direction register for port 3B
ldx #$00 ;
rts ; Return DDR3B
; ---------------------------------------------------------------------------
.endproc
.proc _set_IOR3B: near
; ---------------------------------------------------------------------------
sta OR3B ; Write I/O register for port 3B
lda #$00 ;
ldx #$00 ;
rts ; Return 0000
; ---------------------------------------------------------------------------
.endproc
.proc _get_IOR3B: near
; ---------------------------------------------------------------------------
lda OR3B ; Read I/O register for port 3B
ldx #$00 ;
rts ; Return OR3B
; ---------------------------------------------------------------------------
.endproc