ceda-demo/src/io_a.asm

SECTION code
PUBLIC _io_out

_io_out:
    push    ix
    ld      ix,$0000
    add     ix,sp

    push bc

    ld      c,(ix+$04)
    ld      b,(ix+$05)
    out     (c),b

    pop     bc

    pop ix
    ret

PUBLIC _io_in
_io_in:
    push    ix
    ld      ix,$0000
    add     ix,sp

    push    bc

    ld      c,(ix+$04)
    in      l,(c)

    pop     bc

    pop     ix
    ret
Introduce I/O module for C (out). 2023-10-13 07:44:39 +00:00			`SECTION code`
			`PUBLIC _io_out`

			`_io_out:`
			`push ix`
			`ld ix,$0000`
			`add ix,sp`

			`push bc`

			`ld c,(ix+$04)`
			`ld b,(ix+$05)`
			`out (c),b`

			`pop bc`

			`pop ix`
			`ret`
Add routine to read from IO space from C. 2023-10-16 20:12:08 +00:00
			`PUBLIC _io_in`
			`_io_in:`
			`push ix`
			`ld ix,$0000`
			`add ix,sp`

			`push bc`

			`ld c,(ix+$04)`
			`in l,(c)`

			`pop bc`

			`pop ix`
			`ret`