Mercurial > repos > blastem
view fake_cpm.sz8 @ 1569:0ec89dadb36d
Add code for loading PNG images. Added 360 controller image. WIP work on gamepad mapping UI
author | Michael Pavone <pavone@retrodev.com> |
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date | Thu, 19 Apr 2018 00:51:10 -0700 |
parents | cf6149b7c6e5 |
children |
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CONSOLE_PORT equ 0 STATUS_PORT equ 1 EXIT_PORT equ 2 org $E400 jp handle_call ld a, (should_exit) dec a jr z, do_exit ld a, 1 ld (should_exit), a jp $100 do_exit: no_impl out (EXIT_PORT), a should_exit: dc.b 0 console_in: in a, (CONSOLE_PORT) ld l, a ret console_out: ld a, e out (CONSOLE_PORT), a ret get_iobyte: ld a, (3) ld l, a ret set_iobyte: ld a, e ld (3), a ret write_string: ld c, '$' jp .start .continue out (CONSOLE_PORT), a inc de .start ld a, (de) cp c jr nz, .continue ;flush output out (STATUS_PORT),a ret read_string: ld a, (de) ld c, a ld b, $A ;newline inc c inc de push de inc de jp .start .continue in a, (CONSOLE_PORT) cp b jr z, .end ld (de), a inc de .start dec c jr nz, .continue ;todo: consume excess characters .end pop hl ex de, hl sbc hl, de ld a, l ld (de), a ret console_status: in a, (STATUS_PORT) ld l, a ret handle_call: ld a, c or a jr z, do_exit dec a jr z, console_in dec a jr z, console_out dec a jr z, no_impl ;aux reader input dec a jr z, no_impl ;aux punch output dec a jr z, no_impl ;printer output dec a jr z, no_impl ;direct console IO dec a jr z, get_iobyte dec a jr z, set_iobyte dec a jr z, write_string dec a jr z, read_string dec a jr z, console_status jp no_impl