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fix ldx and stx instructions and small refactor to vram

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This commit is contained in:
FranLMSP
2023-10-06 23:08:03 -05:00
parent 8f05a21ebc
commit 5c8bd6afca
3 changed files with 16 additions and 15 deletions
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snes-frontend/src/ppu.rs
+8 -7
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@@ -70,14 +70,15 @@ fn render_background_char_2bpp(bgdebug: &mut BgDebug, registers: &PPURegisters)
let current_char_row = y.rem_euclid(8);
// 8x8 pixels, 2 bitplanes, each word (16bit) holds 8 pixels
// so 1 char is 8 bytes x 2
let char_base_vram_address = current_char * 8 * 2;
let char_base_vram_address = current_char * 8;
let effective_vram_address = vram_base_address + (
char_base_vram_address + (current_char_row * 2)
char_base_vram_address + (current_char_row)
);
let current_pixel = x + (y * width);
let lsb_bitplane= vram[effective_vram_address];
let msb_bitplane= vram[effective_vram_address + 1];
let vram_word = vram[effective_vram_address];
let lsb_bitplane= vram_word as u8;
let msb_bitplane= (vram_word >> 8) as u8;
let pixels = [
(
(lsb_bitplane >> 7) |
@@ -296,12 +297,12 @@ pub fn vram_window(ppu_registers: &PPURegisters, vram_debug: &mut VRAMMap, show_
let address_end = vram_debug.address_end;
let mut header = String::from(" | ");
for page in 0x00..=0x0F {
header = format!("{}{:02X} ", header, page);
header = format!("{} {:02X} ", header, page);
}
ui.text(header);
let mut divider = String::from("-----|-");
for _ in 0x00..=0x0F {
divider = format!("{}---", divider);
divider = format!("{}-----", divider);
}
ui.text(divider);
let vector = (address_start..=address_end).collect::<Vec<u16>>();
@@ -309,7 +310,7 @@ pub fn vram_window(ppu_registers: &PPURegisters, vram_debug: &mut VRAMMap, show_
for row in chunks {
let mut address_row = format!("{:04X} | ", row[0]);
for address in row {
address_row = format!("{}{:02X} ", address_row, ppu_registers.vram()[(*address) as usize]);
address_row = format!("{}{:04X} ", address_row, ppu_registers.vram()[(*address) as usize]);
}
ui.text(address_row);
}