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8bitworkshop/presets/msx/hello.wiz
2022-01-24 18:51:39 -06:00

76 lines
2.8 KiB
Plaintext

import "msx";
bank rom @ 0x4000 : [constdata; 0x4000];
bank ram @ 0xE000 : [vardata; 0x2000];
in ram {}
in rom {
// FIXME: add support for MSX ROM header format directly in Wiz.
namespace header {
const id = "AB";
const init_handler = main;
const statement_handler = 0u16;
const expansion_handler = 0u16;
const basic_start = 0u16;
const padding = [0u8; 6];
}
#[fallthrough] func main() {
interrupt = false;
// Set border color.
msx.bios.border_color = a = msx.vdp.color.BLACK;
msx.bios.vdp_apply_colors();
// Init screen mode.
load_inc_repeat(
de = <>:&msx.bios.screen_2_nametable,
hl = <>:&screen_init_data,
bc = sizeof(typeof(screen_init_data)));
msx.bios.init_screen_2(
msx.bios.screen_2_nametable,
msx.bios.screen_2_tile_color_table,
msx.bios.screen_2_tile_pattern_table,
msx.bios.screen_2_sprite_attribute_table,
msx.bios.screen_2_sprite_pattern_table
);
// Disable the screen so we can access VRAM. (Initializing the screen mode also enables the screen).
msx.bios.disable_screen();
// Load tileset colors.
let COLOR_ATTRIBUTE = (msx.vdp.color.WHITE << 4) | msx.vdp.color.LIGHT_BLUE;
msx.bios.vdp_vram_fill_block(msx.vdp.screen2.TILESET_COLOR_RAM_ADDRESS, COLOR_ATTRIBUTE, msx.vdp.screen2.TILESET_COLOR_RAM_SIZE);
// Load tileset patterns.
msx.bios.vdp_vram_write_block(msx.vdp.screen2.TILESET_PATTERN_BANK_TOP_ADDRESS, &bkg_tileset[0], sizeof(typeof(bkg_tileset)));
msx.bios.vdp_vram_write_block(msx.vdp.screen2.TILESET_PATTERN_BANK_MIDDLE_ADDRESS, &bkg_tileset[0], sizeof(typeof(bkg_tileset)));
msx.bios.vdp_vram_write_block(msx.vdp.screen2.TILESET_PATTERN_BANK_BOTTOM_ADDRESS, &bkg_tileset[0], sizeof(typeof(bkg_tileset)));
// Clear nametable.
msx.bios.vdp_vram_fill_block(msx.vdp.screen2.NAMETABLE_ADDRESS, 0, msx.vdp.screen2.NAMETABLE_SIZE);
// Write text to nametable.
let START_OFFSET_Y = 8;
let START_OFFSET_X = 10;
let MESSAGE_DEST_ADDRESS = msx.vdp.screen2.NAMETABLE_ADDRESS + START_OFFSET_Y * 32 + START_OFFSET_X;
msx.bios.vdp_vram_write_block(MESSAGE_DEST_ADDRESS, &message[0], sizeof(typeof(message)));
// Turn screen on.
msx.bios.enable_screen();
interrupt = true;
while true {
halt();
}
}
const screen_init_data : [u16] = [
msx.vdp.screen2.NAMETABLE_ADDRESS,
msx.vdp.screen2.TILESET_COLOR_RAM_ADDRESS,
msx.vdp.screen2.TILESET_PATTERN_RAM_ADDRESS,
msx.vdp.screen2.SPRITE_ATTRIBUTE_ADDRESS,
msx.vdp.screen2.SPRITE_PATTERN_ADDRESS,
];
const message = "HELLO WORLD";
const bkg_tileset = embed "hello_tiles.chr";
}