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Initial setup for mode 320x240x256

mode-320-240
Ryan Kennedy 2020-04-04 22:53:36 -05:00
parent 8b68414385
commit ee23c6162e
5 changed files with 175 additions and 4 deletions
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76
src/configurations.rs
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@ -316,7 +316,7 @@ pub const MODE_640X480X16_CONFIGURATION: VgaConfiguration = VgaConfiguration {
],
};
/// Register values for Vga mode 640x480x16 Graphics.
/// Register values for Vga mode 320x200x256 Graphics.
pub const MODE_320X200X256_CONFIGURATION: VgaConfiguration = VgaConfiguration {
// Configuration values acquired from https://www.singlix.com/trdos/archive/vga/Graphics%20in%20pmode.pdf
miscellaneous_output: 0x63,
@ -389,3 +389,77 @@ pub const MODE_320X200X256_CONFIGURATION: VgaConfiguration = VgaConfiguration {
(AttributeControllerIndex::ColorSelect, 0x00),
],
};
/// Register values for Vga mode 320x200x256x Graphics.
pub const MODE_320X240X256_CONFIGURATION: VgaConfiguration = VgaConfiguration {
// Configuration values acquired from https://www.singlix.com/trdos/archive/vga/Graphics%20in%20pmode.pdf
miscellaneous_output: 0x63,
sequencer_registers: &[
(SequencerIndex::SequencerReset, 0x03),
(SequencerIndex::ClockingMode, 0x01),
(SequencerIndex::PlaneMask, 0x0F),
(SequencerIndex::CharacterFont, 0x00),
(SequencerIndex::MemoryMode, 0x06),
],
crtc_controller_registers: &[
(CrtcControllerIndex::HorizontalTotal, 0x5F),
(CrtcControllerIndex::HorizontalDisplayEnableEnd, 0x4F),
(CrtcControllerIndex::HorizontalBlankingStart, 0x50),
(CrtcControllerIndex::HorizontalBlankingEnd, 0x82),
(CrtcControllerIndex::HorizontalSyncStart, 0x54),
(CrtcControllerIndex::HorizontalSyncEnd, 0x80),
(CrtcControllerIndex::VeritcalTotal, 0xBF),
(CrtcControllerIndex::Overflow, 0x1F),
(CrtcControllerIndex::PresetRowScan, 0x00),
(CrtcControllerIndex::MaximumScanLine, 0x41),
(CrtcControllerIndex::TextCursorStart, 0x00),
(CrtcControllerIndex::TextCursorEnd, 0x00),
(CrtcControllerIndex::StartAddressHigh, 0x00),
(CrtcControllerIndex::StartAddressLow, 0x00),
(CrtcControllerIndex::TextCursorLocationHigh, 0x00),
(CrtcControllerIndex::TextCursorLocationLow, 0x00),
(CrtcControllerIndex::VerticalSyncStart, 0x9C),
(CrtcControllerIndex::VerticalSyncEnd, 0x0E),
(CrtcControllerIndex::VerticalDisplayEnableEnd, 0x8F),
(CrtcControllerIndex::Offset, 0x28),
(CrtcControllerIndex::UnderlineLocation, 0x00),
(CrtcControllerIndex::VerticalBlankingStart, 0x96),
(CrtcControllerIndex::VerticalBlankingEnd, 0xB9),
(CrtcControllerIndex::ModeControl, 0xe3),
(CrtcControllerIndex::LineCompare, 0xFF),
],
graphics_controller_registers: &[
(GraphicsControllerIndex::SetReset, 0x00),
(GraphicsControllerIndex::EnableSetReset, 0x00),
(GraphicsControllerIndex::ColorCompare, 0x00),
(GraphicsControllerIndex::DataRotate, 0x00),
(GraphicsControllerIndex::ReadPlaneSelect, 0x00),
(GraphicsControllerIndex::GraphicsMode, 0x40),
(GraphicsControllerIndex::Miscellaneous, 0x05),
(GraphicsControllerIndex::ColorDontCare, 0x0F),
(GraphicsControllerIndex::BitMask, 0xFF),
],
attribute_controller_registers: &[
(AttributeControllerIndex::PaletteRegister0, 0x00),
(AttributeControllerIndex::PaletteRegister1, 0x01),
(AttributeControllerIndex::PaletteRegister2, 0x02),
(AttributeControllerIndex::PaletteRegister3, 0x03),
(AttributeControllerIndex::PaletteRegister4, 0x04),
(AttributeControllerIndex::PaletteRegister5, 0x05),
(AttributeControllerIndex::PaletteRegister6, 0x06),
(AttributeControllerIndex::PaletteRegister7, 0x07),
(AttributeControllerIndex::PaletteRegister8, 0x08),
(AttributeControllerIndex::PaletteRegister9, 0x09),
(AttributeControllerIndex::PaletteRegisterA, 0x0A),
(AttributeControllerIndex::PaletteRegisterB, 0x0B),
(AttributeControllerIndex::PaletteRegisterC, 0x0C),
(AttributeControllerIndex::PaletteRegisterD, 0x0D),
(AttributeControllerIndex::PaletteRegisterE, 0x0E),
(AttributeControllerIndex::PaletteRegisterF, 0x0F),
(AttributeControllerIndex::ModeControl, 0x41),
(AttributeControllerIndex::OverscanColor, 0x00),
(AttributeControllerIndex::MemoryPlaneEnable, 0x0F),
(AttributeControllerIndex::HorizontalPixelPanning, 0x00),
(AttributeControllerIndex::ColorSelect, 0x00),
],
};

2
src/registers/sequencer.rs
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@ -96,7 +96,7 @@ impl SequencerRegisters {
/// Sets the plane mask of the sequencer controller, as specified by `plane_mask`.
pub fn set_plane_mask(&mut self, plane_mask: PlaneMask) {
let original_value = self.read(SequencerIndex::PlaneMask);
let original_value = self.read(SequencerIndex::PlaneMask) & 0xF0;
self.write(
SequencerIndex::PlaneMask,
original_value | u8::from(plane_mask),

14
src/vga.rs
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@ -2,8 +2,9 @@
use super::{
configurations::{
VgaConfiguration, MODE_320X200X256_CONFIGURATION, MODE_40X25_CONFIGURATION,
MODE_40X50_CONFIGURATION, MODE_640X480X16_CONFIGURATION, MODE_80X25_CONFIGURATION,
VgaConfiguration, MODE_320X200X256_CONFIGURATION, MODE_320X240X256_CONFIGURATION,
MODE_40X25_CONFIGURATION, MODE_40X50_CONFIGURATION, MODE_640X480X16_CONFIGURATION,
MODE_80X25_CONFIGURATION,
},
fonts::VgaFont,
registers::{
@ -59,6 +60,8 @@ pub enum VideoMode {
Mode80x25,
/// Represents graphics mode 320x200x256.
Mode320x200x256,
/// Represents graphics mode 320x240x256.
Mode320x240x256,
/// Represents graphics mode 640x480x16.
Mode640x480x16,
}
@ -101,6 +104,7 @@ impl Vga {
VideoMode::Mode40x50 => self.set_video_mode_40x50(),
VideoMode::Mode80x25 => self.set_video_mode_80x25(),
VideoMode::Mode320x200x256 => self.set_video_mode_320x200x256(),
VideoMode::Mode320x240x256 => self.set_video_mode_320x240x256(),
VideoMode::Mode640x480x16 => self.set_video_mode_640x480x16(),
}
}
@ -275,6 +279,12 @@ impl Vga {
self.most_recent_video_mode = Some(VideoMode::Mode320x200x256);
}
/// Sets the video card to Mode 320x200x256x.
fn set_video_mode_320x240x256(&mut self) {
self.set_registers(&MODE_320X240X256_CONFIGURATION);
self.most_recent_video_mode = Some(VideoMode::Mode320x240x256);
}
/// Sets the video card to Mode 640x480x16.
fn set_video_mode_640x480x16(&mut self) {
self.set_registers(&MODE_640X480X16_CONFIGURATION);

85
src/writers/graphics_320x240x256.rs Normal file
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@ -0,0 +1,85 @@
use super::{GraphicsWriter, Screen};
use crate::{
colors::DEFAULT_PALETTE,
drawing::{Bresenham, Point},
registers::PlaneMask,
vga::{Vga, VideoMode, VGA},
};
use font8x8::UnicodeFonts;
use spinning_top::SpinlockGuard;
const WIDTH: usize = 320;
const HEIGHT: usize = 200;
const SIZE: usize = (WIDTH * HEIGHT) / 4;
#[derive(Debug, Clone, Copy, Default)]
pub struct Graphics320x240x256;
impl Screen for Graphics320x240x256 {
const WIDTH: usize = WIDTH;
const HEIGHT: usize = HEIGHT;
const SIZE: usize = SIZE;
}
impl GraphicsWriter<u8> for Graphics320x240x256 {
fn clear_screen(&self, color: u8) {
let (_vga, frame_buffer) = self.get_frame_buffer();
unsafe {
frame_buffer.write_bytes(color, Self::SIZE);
}
}
fn draw_line(&self, start: Point<isize>, end: Point<isize>, color: u8) {
for (x, y) in Bresenham::new(start, end) {
self.set_pixel(x as usize, y as usize, color);
}
}
fn set_pixel(&self, x: usize, y: usize, color: u8) {
let (mut vga, frame_buffer) = self.get_frame_buffer();
unsafe {
let offset = (WIDTH * y + x) / 4;
let plane_mask = 0x1 << (x & 3);
vga.sequencer_registers
.set_plane_mask(PlaneMask::from_bits(plane_mask).unwrap());
frame_buffer.add(offset).write_volatile(color);
}
}
fn draw_character(&self, x: usize, y: usize, character: char, color: u8) {
let character = match font8x8::BASIC_FONTS.get(character) {
Some(character) => character,
// Default to a filled block if the character isn't found
None => font8x8::unicode::BLOCK_UNICODE[8].byte_array(),
};
for (row, byte) in character.iter().enumerate() {
for bit in 0..8 {
match *byte & 1 << bit {
0 => (),
_ => self.set_pixel(x + bit, y + row, color),
}
}
}
}
fn set_mode(&self) {
let mut vga = VGA.lock();
vga.set_video_mode(VideoMode::Mode320x240x256);
// Some bios mess up the palette when switching modes,
// so explicitly set it.
vga.color_palette_registers.load_palette(&DEFAULT_PALETTE);
}
}
impl Graphics320x240x256 {
pub const fn new() -> Graphics320x240x256 {
Graphics320x240x256
}
/// Returns the start of the `FrameBuffer` as `*mut u8` as
/// well as a lock to the vga driver. This ensures the vga
/// driver stays locked while the frame buffer is in use.
fn get_frame_buffer(self) -> (SpinlockGuard<'static, Vga>, *mut u8) {
let mut vga = VGA.lock();
let frame_buffer = vga.get_frame_buffer();
(vga, u32::from(frame_buffer) as *mut u8)
}
}

2
src/writers/mod.rs
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@ -1,5 +1,6 @@
//! Writers for common vga modes.
mod graphics_320x200x256;
mod graphics_320x240x256;
mod graphics_640x480x16;
mod text_40x25;
mod text_40x50;
@ -14,6 +15,7 @@ use super::{
use spinning_top::SpinlockGuard;
pub use graphics_320x200x256::Graphics320x200x256;
pub use graphics_320x240x256::Graphics320x240x256;
pub use graphics_640x480x16::Graphics640x480x16;
pub use text_40x25::Text40x25;
pub use text_40x50::Text40x50;