mirror/86Box
1
0
Fork 0
mirror of https://github.com/86Box/86Box.git synced 2026-02-24 10:28:19 -07:00
Code Issues Packages Projects Releases Activity

Generalized PC87307 GPIO handler (#6331)

Browse Source
This commit is contained in:
Cacodemon345
2025-10-13 00:39:02 +06:00
committed by GitHub
parent b6879768ee
commit 50c9fd6a0d
1 changed files with 16 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
src/sio/sio_pc87307.c
View File

@@ -34,6 +34,7 @@
#include <86box/fdc.h>
#include <86box/keyboard.h>
#include <86box/sio.h>
#include <86box/random.h>
#include <86box/plat_fallthrough.h>
#include "cpu.h"
@@ -108,6 +109,15 @@ pc87307_gpio_write(uint16_t port, uint8_t val, void *priv)
CS, cpu_state.pc, port, bank, val);
dev->gpio[bank][port & 0x0007] = val;
if (bank == 0) {
if ((port & 0x7) >= 4) {
/* Bit 31 to indicate write to second GPIO set. Only lower 16 bits are returned on reads so it does not matter much. */
machine_handle_gpio(1, (1 << 31) | (dev->gpio[0][5] & dev->gpio[0][4]));
} else {
machine_handle_gpio(1, (dev->gpio[0][0] & dev->gpio[0][1]));
}
}
}
uint8_t
@@ -118,18 +128,18 @@ pc87307_gpio_read(uint16_t port, void *priv)
uint8_t bank = !!(dev->regs[0x22] & 0x80);
uint8_t ret = dev->gpio[bank][port & 0x0007];
switch (port & 0x0003) {
switch (port & 0x0007) {
case 0x0000:
if (bank == 0) {
uint8_t mask = dev->gpio[0][1];
pins = 0x7f;
pins = machine_handle_gpio(0, 0xFFFF) & 0xFF;
ret = (ret & mask) | (pins & ~mask);
}
break;
case 0x0004:
if (bank == 0) {
uint8_t mask = dev->gpio[0][5];
pins = 0xfb;
pins = (machine_handle_gpio(0, 0xFFFF) >> 8) & 0xFF;
ret = (ret & mask) | (pins & ~mask);
} else
ret = 0xff;
@@ -152,13 +162,13 @@ static void
pc87307_gpio_remove(pc87307_t *dev)
{
if (dev->gpio_base != 0xffff) {
io_removehandler(dev->gpio_base, 0x0002,
io_removehandler(dev->gpio_base, 0x0008,
pc87307_gpio_read, NULL, NULL, pc87307_gpio_write, NULL, NULL, dev);
dev->gpio_base = 0xffff;
}
if (dev->gpio_base2 != 0xffff) {
io_removehandler(dev->gpio_base2, 0x0002,
io_removehandler(dev->gpio_base2, 0x0008,
pc87307_gpio_read, NULL, NULL, pc87307_gpio_write, NULL, NULL, dev);
dev->gpio_base2 = 0xffff;
}
@@ -171,7 +181,7 @@ pc87307_gpio_init(pc87307_t *dev, int bank, uint16_t addr)
*bank_base = addr;
io_sethandler(*bank_base, 0x0002,
io_sethandler(*bank_base, 0x0008,
pc87307_gpio_read, NULL, NULL, pc87307_gpio_write, NULL, NULL, dev);
}