mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-08-19 01:28:56 +00:00
36 lines
2.3 KiB
NASM
36 lines
2.3 KiB
NASM
; Demo 1: HELLO, WORLDS! / 2018 hxlnt
|
|
; Inspired by Adam Trionfo's Hello World
|
|
; http://www.ballyalley.com/ml/ml_homebrew/helloworld/hello.asm
|
|
; Assemble with Zmac 1.3
|
|
; From: https://github.com/hxlnt/astrocade
|
|
|
|
INCLUDE "hvglib.h" ; Include HVGLIB library
|
|
ORG FIRSTC ; Initialize at beginning of cartridge ROM area
|
|
DB $55 ; ... 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: DB "HELLO, WORLDS!"; String
|
|
DB 0 ; ... which must be followed by 0
|
|
PrgStart: DI ; Disable interrupts
|
|
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 00001000b ; ... 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 100*BYTEPL ; ... and going for 100 lines
|
|
DB 00010010b ; ... 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 00001100b ; ... with no enlargement, foreground color = 11, background color = 00
|
|
DW PrgName ; ... to show string at PrgName
|
|
EXIT ; Exit interpreter mode
|
|
Loop: JP Loop ; Play infinite loop
|
|
Palettes: DB $BF,$00,$00,$00 ; Left color palette (11b, 10b, 01b, 00b)
|
|
DB $E7,$9A,$39,$19 ; Right color palette (11b, 10b, 01b, 00b)
|