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io: add display unit

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added rendering for modes 3,4,5
also changed how memory structuring works

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
This commit is contained in:
Amneesh Singh
2024-06-22 04:16:12 +05:30
parent 54fc472399
commit 58a503d2c4
13 changed files with 652 additions and 275 deletions
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359
src/io/io.cc
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@@ -76,6 +76,24 @@ ADDR FIFO_A_H = 0x40000A2;
ADDR FIFO_B_L = 0x40000A4;
ADDR FIFO_B_H = 0x40000A6;
// dma
ADDR DMA0SAD = 0x40000B0;
ADDR DMA0DAD = 0x40000B4;
ADDR DMA0CNT_L = 0x40000B8;
ADDR DMA0CNT_H = 0x40000BA;
ADDR DMA1SAD = 0x40000BC;
ADDR DMA1DAD = 0x40000C0;
ADDR DMA1CNT_L = 0x40000C4;
ADDR DMA1CNT_H = 0x40000C6;
ADDR DMA2SAD = 0x40000C8;
ADDR DMA2DAD = 0x40000CC;
ADDR DMA2CNT_L = 0x40000D0;
ADDR DMA2CNT_H = 0x40000D2;
ADDR DMA3SAD = 0x40000D4;
ADDR DMA3DAD = 0x40000D8;
ADDR DMA3CNT_L = 0x40000DC;
ADDR DMA3CNT_H = 0x40000DE;
// system
ADDR POSTFLG = 0x4000300;
ADDR IME = 0x4000208;
@@ -130,45 +148,87 @@ IoDevices::read_halfword(uint32_t address) const {
case name: \
return var;
// lcd
READ(DISPCNT, lcd.lcd_control)
READ(DISPSTAT, lcd.general_lcd_status)
READ(VCOUNT, lcd.vertical_counter)
READ(WININ, lcd.inside_win_0_1)
READ(WINOUT, lcd.outside_win)
READ(BLDCNT, lcd.color_special_effects_selection)
READ(BLDALPHA, lcd.alpha_blending_coefficients)
// lcd
case DISPCNT:
return display.lcd_control.read();
case DISPSTAT:
return display.general_lcd_status.read();
case BG0CNT:
return display.bg_control[0].read();
case BG1CNT:
return display.bg_control[1].read();
case BG2CNT:
return display.bg_control[2].read();
case BG3CNT:
return display.bg_control[3].read();
// sound
READ(SOUND1CNT_L, sound.ch1_sweep)
READ(SOUND1CNT_H, sound.ch1_duty_length_env)
READ(SOUND1CNT_X, sound.ch1_freq_control)
READ(SOUND2CNT_L, sound.ch2_duty_length_env)
READ(SOUND2CNT_H, sound.ch2_freq_control)
READ(SOUND3CNT_L, sound.ch3_stop_wave_ram_select)
READ(SOUND3CNT_H, sound.ch3_length_volume)
READ(SOUND3CNT_X, sound.ch3_freq_control)
READ(WAVE_RAM0_L, sound.ch3_wave_pattern[0]);
READ(WAVE_RAM0_H, sound.ch3_wave_pattern[1]);
READ(WAVE_RAM1_L, sound.ch3_wave_pattern[2]);
READ(WAVE_RAM1_H, sound.ch3_wave_pattern[3]);
READ(WAVE_RAM2_L, sound.ch3_wave_pattern[4]);
READ(WAVE_RAM2_H, sound.ch3_wave_pattern[5]);
READ(WAVE_RAM3_L, sound.ch3_wave_pattern[6]);
READ(WAVE_RAM3_H, sound.ch3_wave_pattern[7]);
READ(SOUND4CNT_L, sound.ch4_length_env);
READ(SOUND4CNT_H, sound.ch4_freq_control);
READ(SOUNDCNT_L, sound.ctrl_stereo_volume);
READ(SOUNDCNT_H, sound.ctrl_mixing);
READ(SOUNDCNT_X, sound.ctrl_sound_on_off);
READ(SOUNDBIAS, sound.pwm_control);
READ(VCOUNT, display.vertical_counter)
READ(WININ, display.inside_win_0_1)
READ(WINOUT, display.outside_win)
READ(BLDCNT, display.color_special_effects_selection)
READ(BLDALPHA, display.alpha_blending_coefficients)
// system
READ(POSTFLG, system.post_boot_flag)
READ(IME, system.interrupt_master_enabler)
READ(IE, system.interrupt_enable);
READ(IF, system.interrupt_request_flags);
READ(WAITCNT, system.waitstate_control);
// sound
READ(SOUND1CNT_L, sound.ch1_sweep)
READ(SOUND1CNT_H, sound.ch1_duty_length_env)
READ(SOUND1CNT_X, sound.ch1_freq_control)
READ(SOUND2CNT_L, sound.ch2_duty_length_env)
READ(SOUND2CNT_H, sound.ch2_freq_control)
READ(SOUND3CNT_L, sound.ch3_stop_wave_ram_select)
READ(SOUND3CNT_H, sound.ch3_length_volume)
READ(SOUND3CNT_X, sound.ch3_freq_control)
READ(WAVE_RAM0_L, sound.ch3_wave_pattern[0]);
READ(WAVE_RAM0_H, sound.ch3_wave_pattern[1]);
READ(WAVE_RAM1_L, sound.ch3_wave_pattern[2]);
READ(WAVE_RAM1_H, sound.ch3_wave_pattern[3]);
READ(WAVE_RAM2_L, sound.ch3_wave_pattern[4]);
READ(WAVE_RAM2_H, sound.ch3_wave_pattern[5]);
READ(WAVE_RAM3_L, sound.ch3_wave_pattern[6]);
READ(WAVE_RAM3_H, sound.ch3_wave_pattern[7]);
READ(SOUND4CNT_L, sound.ch4_length_env);
READ(SOUND4CNT_H, sound.ch4_freq_control);
READ(SOUNDCNT_L, sound.ctrl_stereo_volume);
READ(SOUNDCNT_H, sound.ctrl_mixing);
READ(SOUNDCNT_X, sound.ctrl_sound_on_off);
READ(SOUNDBIAS, sound.pwm_control);
// dma
case DMA0CNT_H:
return dma.channels[0].control.read();
case DMA1CNT_H:
return dma.channels[1].control.read();
case DMA2CNT_H:
return dma.channels[2].control.read();
case DMA3CNT_H:
return dma.channels[3].control.read();
READ(DMA0SAD, dma.channels[0].source[0]);
READ(DMA0SAD + 2, dma.channels[0].source[1]);
READ(DMA0DAD, dma.channels[0].destination[0]);
READ(DMA0DAD + 2, dma.channels[0].destination[1]);
READ(DMA0CNT_L, dma.channels[0].word_count);
READ(DMA1SAD, dma.channels[1].source[0]);
READ(DMA1SAD + 2, dma.channels[1].source[1]);
READ(DMA1DAD, dma.channels[1].destination[0]);
READ(DMA1DAD + 2, dma.channels[1].destination[1]);
READ(DMA1CNT_L, dma.channels[1].word_count);
READ(DMA2SAD, dma.channels[2].source[0]);
READ(DMA2SAD + 2, dma.channels[2].source[1]);
READ(DMA2DAD, dma.channels[2].destination[0]);
READ(DMA2DAD + 2, dma.channels[2].destination[1]);
READ(DMA2CNT_L, dma.channels[2].word_count);
READ(DMA3SAD, dma.channels[3].source[0]);
READ(DMA3SAD + 2, dma.channels[3].source[1]);
READ(DMA3DAD, dma.channels[3].destination[0]);
READ(DMA3DAD + 2, dma.channels[3].destination[1]);
READ(DMA3CNT_L, dma.channels[3].word_count);
// system
READ(POSTFLG, system.post_boot_flag)
READ(IME, system.interrupt_master_enabler)
READ(IE, system.interrupt_enable);
READ(IF, system.interrupt_request_flags);
READ(WAITCNT, system.waitstate_control);
#undef READ
@@ -181,6 +241,18 @@ IoDevices::read_halfword(uint32_t address) const {
void
IoDevices::write_halfword(uint32_t address, uint16_t halfword) {
// set lower 16 bits for reference points (BG 2/3)
auto ref_low = [](uint32_t original, uint16_t low) {
return static_cast<int32_t>((original & 0xFFFF0000) | low);
};
// set upper 12 bits for reference points (BG 2/3)
// and sign extend
auto ref_high = [](uint32_t original, uint16_t high) {
return static_cast<int32_t>(
((((high & 0xFFF) << 16) | (original & 0xFFFF)) << 4) >> 4);
};
switch (address) {
#define WRITE(name, var) \
@@ -194,82 +266,146 @@ IoDevices::write_halfword(uint32_t address, uint16_t halfword) {
break;
// lcd
WRITE(DISPCNT, lcd.lcd_control)
WRITE(DISPSTAT, lcd.general_lcd_status)
WRITE(BG0CNT, lcd.bg0_control)
WRITE(BG1CNT, lcd.bg1_control)
WRITE(BG2CNT, lcd.bg2_control)
WRITE(BG3CNT, lcd.bg3_control)
WRITE(BG0HOFS, lcd.bg0_x_offset)
WRITE(BG0VOFS, lcd.bg0_y_offset)
WRITE(BG1HOFS, lcd.bg1_x_offset)
WRITE(BG1VOFS, lcd.bg1_y_offset)
WRITE(BG2HOFS, lcd.bg2_x_offset)
WRITE(BG2VOFS, lcd.bg2_y_offset)
WRITE(BG3HOFS, lcd.bg3_x_offset)
WRITE(BG3VOFS, lcd.bg3_y_offset)
WRITE(BG2PA, lcd.bg2_rot_scaling_parameters[0])
WRITE(BG2PB, lcd.bg2_rot_scaling_parameters[1])
WRITE(BG2PC, lcd.bg2_rot_scaling_parameters[2])
WRITE(BG2PD, lcd.bg2_rot_scaling_parameters[3])
WRITE(BG2X_L, lcd.bg2_reference_x[0])
WRITE(BG2X_H, lcd.bg2_reference_x[1])
WRITE(BG2Y_L, lcd.bg2_reference_y[0])
WRITE(BG2Y_H, lcd.bg2_reference_y[1])
WRITE(BG3PA, lcd.bg3_rot_scaling_parameters[0])
WRITE(BG3PB, lcd.bg3_rot_scaling_parameters[1])
WRITE(BG3PC, lcd.bg3_rot_scaling_parameters[2])
WRITE(BG3PD, lcd.bg3_rot_scaling_parameters[3])
WRITE(BG3X_L, lcd.bg3_reference_x[0])
WRITE(BG3X_H, lcd.bg3_reference_x[1])
WRITE(BG3Y_L, lcd.bg3_reference_y[0])
WRITE(BG3Y_H, lcd.bg3_reference_y[1])
WRITE(WIN0H, lcd.win0_horizontal_dimensions)
WRITE(WIN1H, lcd.win1_horizontal_dimensions)
WRITE(WIN0V, lcd.win0_vertical_dimensions)
WRITE(WIN1V, lcd.win1_vertical_dimensions)
WRITE(WININ, lcd.inside_win_0_1)
WRITE(WINOUT, lcd.outside_win)
WRITE(MOSAIC, lcd.mosaic_size)
WRITE(BLDCNT, lcd.color_special_effects_selection)
WRITE(BLDALPHA, lcd.alpha_blending_coefficients)
WRITE(BLDY, lcd.brightness_coefficient)
case DISPCNT:
display.lcd_control.write(halfword);
break;
case DISPSTAT:
display.general_lcd_status.write(halfword);
break;
case BG0CNT:
display.bg_control[0].write(halfword);
break;
case BG1CNT:
display.bg_control[1].write(halfword);
break;
case BG2CNT:
display.bg_control[2].write(halfword);
break;
case BG3CNT:
display.bg_control[3].write(halfword);
break;
// sound
WRITE(SOUND1CNT_L, sound.ch1_sweep)
WRITE(SOUND1CNT_H, sound.ch1_duty_length_env)
WRITE(SOUND1CNT_X, sound.ch1_freq_control)
WRITE(SOUND2CNT_L, sound.ch2_duty_length_env)
WRITE(SOUND2CNT_H, sound.ch2_freq_control)
WRITE(SOUND3CNT_L, sound.ch3_stop_wave_ram_select)
WRITE(SOUND3CNT_H, sound.ch3_length_volume)
WRITE(SOUND3CNT_X, sound.ch3_freq_control)
WRITE(WAVE_RAM0_L, sound.ch3_wave_pattern[0]);
WRITE(WAVE_RAM0_H, sound.ch3_wave_pattern[1]);
WRITE(WAVE_RAM1_L, sound.ch3_wave_pattern[2]);
WRITE(WAVE_RAM1_H, sound.ch3_wave_pattern[3]);
WRITE(WAVE_RAM2_L, sound.ch3_wave_pattern[4]);
WRITE(WAVE_RAM2_H, sound.ch3_wave_pattern[5]);
WRITE(WAVE_RAM3_L, sound.ch3_wave_pattern[6]);
WRITE(WAVE_RAM3_H, sound.ch3_wave_pattern[7]);
WRITE(SOUND4CNT_L, sound.ch4_length_env);
WRITE(SOUND4CNT_H, sound.ch4_freq_control);
WRITE(SOUNDCNT_L, sound.ctrl_stereo_volume);
WRITE(SOUNDCNT_H, sound.ctrl_mixing);
WRITE(SOUNDCNT_X, sound.ctrl_sound_on_off);
WRITE(SOUNDBIAS, sound.pwm_control);
WRITE(FIFO_A_L, sound.fifo_a[0]);
WRITE(FIFO_A_H, sound.fifo_a[1]);
WRITE(FIFO_B_L, sound.fifo_b[0]);
WRITE(FIFO_B_H, sound.fifo_b[1]);
WRITE(BG0HOFS, display.bg0_offset.x)
WRITE(BG0VOFS, display.bg0_offset.y)
WRITE(BG1HOFS, display.bg1_offset.x)
WRITE(BG1VOFS, display.bg1_offset.y)
WRITE(BG2HOFS, display.bg2_offset.x)
WRITE(BG2VOFS, display.bg2_offset.y)
WRITE(BG3HOFS, display.bg3_offset.x)
WRITE(BG3VOFS, display.bg3_offset.y)
WRITE(BG2PA, display.bg2_rot_scale.a)
WRITE(BG2PB, display.bg2_rot_scale.b)
WRITE(BG2PC, display.bg2_rot_scale.c)
WRITE(BG2PD, display.bg2_rot_scale.d)
WRITE_2(BG2X_L,
display.bg2_rot_scale.ref.x,
ref_low(display.bg2_rot_scale.ref.x, halfword));
WRITE_2(BG2X_H,
display.bg2_rot_scale.ref.x,
ref_high(display.bg2_rot_scale.ref.x, halfword));
WRITE_2(BG2Y_L,
display.bg2_rot_scale.ref.y,
ref_low(display.bg2_rot_scale.ref.y, halfword));
WRITE_2(BG2Y_H,
display.bg2_rot_scale.ref.y,
ref_high(display.bg2_rot_scale.ref.y, halfword));
WRITE(BG3PA, display.bg3_rot_scale.a)
WRITE(BG3PB, display.bg3_rot_scale.b)
WRITE(BG3PC, display.bg3_rot_scale.c)
WRITE(BG3PD, display.bg3_rot_scale.d)
WRITE_2(BG3X_L,
display.bg3_rot_scale.ref.x,
ref_low(display.bg3_rot_scale.ref.x, halfword));
WRITE_2(BG3X_H,
display.bg3_rot_scale.ref.x,
ref_high(display.bg3_rot_scale.ref.x, halfword));
WRITE_2(BG3Y_L,
display.bg3_rot_scale.ref.y,
ref_low(display.bg3_rot_scale.ref.y, halfword));
WRITE_2(BG3Y_H,
display.bg3_rot_scale.ref.y,
ref_high(display.bg3_rot_scale.ref.y, halfword));
WRITE(WIN0H, display.win0_horizontal_dimensions)
WRITE(WIN1H, display.win1_horizontal_dimensions)
WRITE(WIN0V, display.win0_vertical_dimensions)
WRITE(WIN1V, display.win1_vertical_dimensions)
WRITE(WININ, display.inside_win_0_1)
WRITE(WINOUT, display.outside_win)
WRITE(MOSAIC, display.mosaic_size)
WRITE(BLDCNT, display.color_special_effects_selection)
WRITE(BLDALPHA, display.alpha_blending_coefficients)
WRITE(BLDY, display.brightness_coefficient)
// system
WRITE_2(POSTFLG, system.post_boot_flag, halfword & 1)
WRITE_2(IME, system.interrupt_master_enabler, halfword & 1)
WRITE(IE, system.interrupt_enable);
WRITE(IF, system.interrupt_request_flags);
WRITE(WAITCNT, system.waitstate_control);
WRITE_2(HALTCNT, system.low_power_mode, get_bit(halfword, 7));
// sound
WRITE(SOUND1CNT_L, sound.ch1_sweep)
WRITE(SOUND1CNT_H, sound.ch1_duty_length_env)
WRITE(SOUND1CNT_X, sound.ch1_freq_control)
WRITE(SOUND2CNT_L, sound.ch2_duty_length_env)
WRITE(SOUND2CNT_H, sound.ch2_freq_control)
WRITE(SOUND3CNT_L, sound.ch3_stop_wave_ram_select)
WRITE(SOUND3CNT_H, sound.ch3_length_volume)
WRITE(SOUND3CNT_X, sound.ch3_freq_control)
WRITE(WAVE_RAM0_L, sound.ch3_wave_pattern[0]);
WRITE(WAVE_RAM0_H, sound.ch3_wave_pattern[1]);
WRITE(WAVE_RAM1_L, sound.ch3_wave_pattern[2]);
WRITE(WAVE_RAM1_H, sound.ch3_wave_pattern[3]);
WRITE(WAVE_RAM2_L, sound.ch3_wave_pattern[4]);
WRITE(WAVE_RAM2_H, sound.ch3_wave_pattern[5]);
WRITE(WAVE_RAM3_L, sound.ch3_wave_pattern[6]);
WRITE(WAVE_RAM3_H, sound.ch3_wave_pattern[7]);
WRITE(SOUND4CNT_L, sound.ch4_length_env);
WRITE(SOUND4CNT_H, sound.ch4_freq_control);
WRITE(SOUNDCNT_L, sound.ctrl_stereo_volume);
WRITE(SOUNDCNT_H, sound.ctrl_mixing);
WRITE(SOUNDCNT_X, sound.ctrl_sound_on_off);
WRITE(SOUNDBIAS, sound.pwm_control);
WRITE(FIFO_A_L, sound.fifo_a[0]);
WRITE(FIFO_A_H, sound.fifo_a[1]);
WRITE(FIFO_B_L, sound.fifo_b[0]);
WRITE(FIFO_B_H, sound.fifo_b[1]);
// dma
case DMA0CNT_H:
dma.channels[0].control.write(halfword);
break;
case DMA1CNT_H:
dma.channels[1].control.write(halfword);
break;
case DMA2CNT_H:
dma.channels[2].control.write(halfword);
break;
case DMA3CNT_H:
dma.channels[3].control.write(halfword);
break;
WRITE(DMA0SAD, dma.channels[0].source[0]);
WRITE(DMA0SAD + 2, dma.channels[0].source[1]);
WRITE(DMA0DAD, dma.channels[0].destination[0]);
WRITE(DMA0DAD + 2, dma.channels[0].destination[1]);
WRITE(DMA0CNT_L, dma.channels[0].word_count);
WRITE(DMA1SAD, dma.channels[1].source[0]);
WRITE(DMA1SAD + 2, dma.channels[1].source[1]);
WRITE(DMA1DAD, dma.channels[1].destination[0]);
WRITE(DMA1DAD + 2, dma.channels[1].destination[1]);
WRITE(DMA1CNT_L, dma.channels[1].word_count);
WRITE(DMA2SAD, dma.channels[2].source[0]);
WRITE(DMA2SAD + 2, dma.channels[2].source[1]);
WRITE(DMA2DAD, dma.channels[2].destination[0]);
WRITE(DMA2DAD + 2, dma.channels[2].destination[1]);
WRITE(DMA2CNT_L, dma.channels[2].word_count);
WRITE(DMA3SAD, dma.channels[3].source[0]);
WRITE(DMA3SAD + 2, dma.channels[3].source[1]);
WRITE(DMA3DAD, dma.channels[3].destination[0]);
WRITE(DMA3DAD + 2, dma.channels[3].destination[1]);
WRITE(DMA3CNT_L, dma.channels[3].word_count);
// system
WRITE_2(POSTFLG, system.post_boot_flag, halfword & 1)
WRITE_2(IME, system.interrupt_master_enabler, halfword & 1)
WRITE(IE, system.interrupt_enable);
WRITE(IF, system.interrupt_request_flags);
WRITE(WAITCNT, system.waitstate_control);
WRITE_2(HALTCNT, system.low_power_mode, get_bit(halfword, 7));
#undef WRITE
#undef WRITE_2
@@ -279,4 +415,5 @@ IoDevices::write_halfword(uint32_t address, uint16_t halfword) {
}
return;
}
}