80486DX2-66/86Box-fork
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DDC work

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This commit is contained in:
Cacodemon345
2024-01-30 23:33:55 +06:00
parent 439c1152fb
commit 2ee97bf1e1
1 changed files with 39 additions and 5 deletions
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44
src/video/vid_c&t_69000.c
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@@ -10,11 +10,9 @@
*
*
*
* Authors: Sarah Walker, <https://pcem-emulator.co.uk/>
* Miran Grca, <mgrca8@gmail.com>
* Authors: Cacodemon345
*
* Copyright 2008-2018 Sarah Walker.
* Copyright 2016-2018 Miran Grca.
* Copyright 2023-2024 Cacodemon345
*/
#include <stdio.h>
#include <stdint.h>
@@ -34,6 +32,8 @@
#include <86box/vid_svga_render.h>
#include <86box/pci.h>
#include <86box/thread.h>
#include <86box/i2c.h>
#include <86box/vid_ddc.h>
#include <assert.h>
typedef struct chips_69000_t {
@@ -81,6 +81,8 @@ typedef struct chips_69000_t {
};
rom_t bios_rom;
void* i2c_ddc, *ddc;
} chips_69000_t;
static video_timings_t timing_sis = { .type = VIDEO_PCI, .write_b = 2, .write_w = 2, .write_l = 4, .read_b = 20, .read_w = 20, .read_l = 35 };
@@ -666,7 +668,16 @@ chips_69000_read_ext_reg(chips_69000_t* chips)
case 0x0A:
return chips->ext_regs[index] & 0x37;
case 0x63:
return 0xFF;
{
uint8_t val = chips->ext_regs[index];
if (!(chips->ext_regs[0x62] & 0x8))
val = (val & ~8) | (i2c_gpio_get_scl(chips->i2c_ddc) << 3);
if (!(chips->ext_regs[0x62] & 0x4))
val = (val & ~4) | (i2c_gpio_get_sda(chips->i2c_ddc) << 2);
return val;
}
case 0x70:
return 0x3;
case 0x71:
@@ -711,6 +722,24 @@ chips_69000_write_ext_reg(chips_69000_t* chips, uint8_t val)
case 0x62:
chips->ext_regs[chips->ext_index] = val & 0x9C;
break;
case 0x63:
{
uint8_t scl = 0, sda = 0;
if (chips->ext_regs[0x62] & 0x8)
scl = !!(val & 8);
else
scl = i2c_gpio_get_scl(chips->i2c_ddc);
if (chips->ext_regs[0x62] & 0x4)
sda = !!(val & 4);
else
scl = i2c_gpio_get_sda(chips->i2c_ddc);
i2c_gpio_set(chips->i2c_ddc, scl, sda);
chips->ext_regs[chips->ext_index] = val & 0x9F;
break;
}
case 0x67:
chips->ext_regs[chips->ext_index] = val & 0x2;
break;
@@ -1285,6 +1314,9 @@ chips_69000_init(const device_t *info)
timer_add(&chips->decrement_timer, chips_69000_decrement_timer, chips, 0);
timer_on_auto(&chips->decrement_timer, 1000000. / 2000.);
chips->i2c_ddc = i2c_gpio_init("c&t_69000_mga");
chips->ddc = ddc_init(i2c_gpio_get_bus(chips->i2c_ddc));
return chips;
}
@@ -1302,6 +1334,8 @@ chips_69000_close(void *p)
chips->quit = 1;
// thread_set_event(chips->fifo_event);
// thread_wait(chips->accel_thread);
ddc_close(chips->ddc);
i2c_gpio_close(chips->i2c_ddc);
svga_close(&chips->svga);
free(chips);