mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-09-11 09:54:37 +00:00
50 lines
2.4 KiB
ArmAsm
50 lines
2.4 KiB
ArmAsm
; Demo 1: HELLO, WORLDS! / 2018 hxlnt
|
|
; Inspired by Adam Trionfo Hello World
|
|
; http://www.ballyalley.com/ml/ml_homebrew/helloworld/hello.asm
|
|
; From: https://github.com/hxlnt/astrocade
|
|
|
|
; need these in 1st file sdcc linker sees
|
|
.area _HOME
|
|
.area _INITIALIZER
|
|
.area _DATA
|
|
.area _INITIALIZED
|
|
.area _BSEG
|
|
.area _BSS
|
|
.area _HEAP
|
|
.area _CODE
|
|
|
|
.include "astrocade.inc"
|
|
.globl _main
|
|
_main:
|
|
.db 0x55 ; ... with the code for a normal menued cartridge
|
|
.dw MENUST ; Initialize menu
|
|
.dw PrgName ; ... with string at PrgName
|
|
.dw PrgStart ; ... such that selecting the program enters PrgStart
|
|
PrgName: .ascii "HELLO, WORLDS!"; String
|
|
.db 0 ; ... which must be followed by 0
|
|
PrgStart: DI ; Disable interrupts
|
|
LD SP,#0x4fce ; position stack below BIOS vars
|
|
ld hl,#0x20d ; small font -> IX
|
|
push hl
|
|
pop ix
|
|
SYSTEM INTPC ; Begin interpreter mode
|
|
DO SETOUT ; Set output ports
|
|
.db 100*2 ; ... with VBLANK line set to line 100
|
|
.db 112/4 ; ... with color boundary 112 pixels from the left of the screen
|
|
.db 0b00001000 ; ... with screen interrupts reenabled
|
|
DO COLSET ; Set color palettes
|
|
.dw Palettes ; ... with the values at Palettes
|
|
DO FILL ; Set background fill
|
|
.dw NORMEM ; ... starting at the beginning of screen RAM
|
|
.dw 99*BYTEPL ; ... and going for 100 lines
|
|
.db 0b00010010 ; ... with a fill pattern of three different colored pixels
|
|
DO STRDIS ; Set string display
|
|
.db 0 ; ... starting 0 pixels from the left of the screen
|
|
.db 32 ; ... and 32 pixels from the top of the screen
|
|
.db 0b00001100 ; ... with no enlargement, foreground color = 11, background color = 00
|
|
.dw PrgName ; ... to show string at PrgName
|
|
DONT XINTC
|
|
Loop: JP Loop ; Play infinite loop
|
|
Palettes: .db 0xBF,0x00,0x00,0x00 ; Left color palette (11b, 10b, 01b, 00b)
|
|
.db 0xE7,0x9A,0x39,0x19 ; Right color palette (11b, 10b, 01b, 00b)
|