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