Machine code restructure, models are now machines instead and the init functions are in the machine files rather than in machine.c (former model.c), also moved the machine stuff into the machine/ subdirectory.

2017-09-02 20:39:57 +02:00
parent be16ee33ba
commit 3e10570bbd
90 changed files with 2390 additions and 2388 deletions
--- a/src/machine/machine_at_neat.c
+++ b/src/machine/machine_at_neat.c
@@ -0,0 +1,90 @@
+/* Copyright holders: Sarah Walker
+   see COPYING for more details
+*/
+/*This is the chipset used in the AMI 286 clone model*/
+#include "../ibm.h"
+
+#include "../cpu/cpu.h"
+#include "../io.h"
+
+#include "machine_at.h"
+#include "machine_at_neat.h"
+
+
+static uint8_t neat_regs[256];
+static int neat_index;
+static int neat_emspage[4];
+
+
+static void neat_write(uint16_t port, uint8_t val, void *priv)
+{
+        switch (port)
+        {
+                case 0x22:
+                neat_index = val;
+                break;
+                
+                case 0x23:
+                neat_regs[neat_index] = val;
+                switch (neat_index)
+                {
+                        case 0x6E: /*EMS page extension*/
+                        neat_emspage[3] = (neat_emspage[3] & 0x7F) | (( val       & 3) << 7);
+                        neat_emspage[2] = (neat_emspage[2] & 0x7F) | (((val >> 2) & 3) << 7);
+                        neat_emspage[1] = (neat_emspage[1] & 0x7F) | (((val >> 4) & 3) << 7);
+                        neat_emspage[0] = (neat_emspage[0] & 0x7F) | (((val >> 6) & 3) << 7);
+                        break;
+                }
+                break;
+
+                case 0x0208: case 0x0209: case 0x4208: case 0x4209:
+                case 0x8208: case 0x8209: case 0xC208: case 0xC209:
+                neat_emspage[port >> 14] = (neat_emspage[port >> 14] & 0x180) | (val & 0x7F);                
+                break;
+        }
+}
+
+
+static uint8_t neat_read(uint16_t port, void *priv)
+{
+        switch (port)
+        {
+                case 0x22:
+                return neat_index;
+                
+                case 0x23:
+                return neat_regs[neat_index];
+        }
+        return 0xff;
+}
+
+
+#if NOT_USED
+static void neat_writeems(uint32_t addr, uint8_t val)
+{
+        ram[(neat_emspage[(addr >> 14) & 3] << 14) + (addr & 0x3FFF)] = val;
+}
+
+
+static uint8_t neat_readems(uint32_t addr)
+{
+        return ram[(neat_emspage[(addr >> 14) & 3] << 14) + (addr & 0x3FFF)];
+}
+#endif
+
+
+static void neat_init(void)
+{
+        io_sethandler(0x0022, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL,  NULL);
+        io_sethandler(0x0208, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL,  NULL);
+        io_sethandler(0x4208, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL,  NULL);
+        io_sethandler(0x8208, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL,  NULL);
+        io_sethandler(0xc208, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL,  NULL);
+}
+
+
+void machine_at_neat_init(void)
+{
+        machine_at_ide_init();
+        neat_init();
+}