Added the "fixed" Rabbit code

2020-06-06 07:50:11 +03:00
parent 53ffc9ae72
commit 66c4ea194d
1 changed files with 119 additions and 0 deletions
--- a/src/chipset/rabbit.c
+++ b/src/chipset/rabbit.c
@@ -0,0 +1,119 @@
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#define HAVE_STDARG_H
+#include <86box/86box.h>
+#include "cpu.h"
+#include <86box/timer.h>
+#include <86box/io.h>
+#include <86box/device.h>
+#include <86box/keyboard.h>
+#include <86box/mem.h>
+#include <86box/fdd.h>
+#include <86box/fdc.h>
+#include <86box/chipset.h>
+
+
+typedef struct
+{
+    uint8_t	cur_reg,
+		regs[16];
+} rabbit_t;
+
+/*
+static void
+rabbit_recalcmapping(rabbit_t *dev)
+{
+    uint32_t base;
+    uint32_t i, shflags = 0;
+
+    shadowbios = 0;
+    shadowbios_write = 0;
+
+    for (i = 0; i < 8; i++) {
+	base = 0xc0000 + (i << 15);
+
+	if (dev->regs[0x00] & 0x08) {
+		shadowbios |= (base >= 0xe0000) && (dev->regs[0x02] & 0x80);
+		shadowbios_write |= (base >= 0xe0000) && !(dev->regs[0x02] & 0x40);
+		shflags = (dev->regs[0x00] & 0x01) ? MEM_READ_INTERNAL : MEM_READ_EXTANY;
+		shflags |= (dev->regs[0x00] & 0x08) ? MEM_WRITE_EXTANY : MEM_WRITE_INTERNAL;
+		mem_set_mem_state(base, 0x8000, shflags);
+	} else
+		mem_set_mem_state(base, 0x8000, MEM_READ_EXTANY | MEM_WRITE_EXTERNAL);
+    }
+
+    flushmmucache();
+}
+*/
+
+static void
+rabbit_write(uint16_t addr, uint8_t val, void *priv)
+{
+    rabbit_t *dev = (rabbit_t *) priv;
+
+    switch (addr) {
+	case 0x22:
+		dev->cur_reg = val;
+		break;
+	case 0x23:
+			dev->regs[dev->cur_reg] = val;
+            /*
+			if (dev->cur_reg == 0x00) {
+				rabbit_recalcmapping(dev);
+			}
+            */
+		break;
+		}
+}
+
+
+static uint8_t
+rabbit_read(uint16_t addr, void *priv)
+{
+    uint8_t ret = 0xff;
+    rabbit_t *dev = (rabbit_t *) priv;
+
+    switch (addr) {
+	case 0x23:
+			ret = dev->regs[dev->cur_reg];
+		break;
+    }
+
+    return ret;
+}
+
+
+static void
+rabbit_close(void *priv)
+{
+    rabbit_t *dev = (rabbit_t *) priv;
+
+    free(dev);
+}
+
+
+static void *
+rabbit_init(const device_t *info)
+{
+    rabbit_t *dev = (rabbit_t *) malloc(sizeof(rabbit_t));
+    memset(dev, 0, sizeof(rabbit_t));
+
+    io_sethandler(0x0022, 0x0001, rabbit_read, NULL, NULL, rabbit_write, NULL, NULL, dev);
+    io_sethandler(0x0023, 0x0001, rabbit_read, NULL, NULL, rabbit_write, NULL, NULL, dev);
+
+    return dev;
+}
+
+
+const device_t rabbit_device = {
+    "SiS Rabbit",
+    0,
+    0,
+    rabbit_init, rabbit_close, NULL,
+    NULL, NULL, NULL,
+    NULL
+};