Initial submission of the PCem-Experimental source code.

src/gameport.c

@@ -0,0 +1,223 @@
+#include <stdlib.h>
+#include "ibm.h"
+#include "device.h"
+#include "io.h"
+#include "plat-joystick.h"
+#include "timer.h"
+
+#include "gameport.h"
+#include "joystick_standard.h"
+#include "joystick_sw_pad.h"
+
+int joystick_type;
+
+static joystick_if_t *joystick_list[] =
+{
+        &joystick_standard,
+        &joystick_standard_4button,
+        &joystick_standard_6button,
+        &joystick_standard_8button,
+        &joystick_sw_pad,
+        NULL
+};
+
+char *joystick_get_name(int joystick)
+{
+        if (!joystick_list[joystick])
+                return NULL;
+        return joystick_list[joystick]->name;
+}
+
+int joystick_get_max_joysticks(int joystick)
+{
+        return joystick_list[joystick]->max_joysticks;
+}
+        
+int joystick_get_axis_count(int joystick)
+{
+        return joystick_list[joystick]->axis_count;
+}
+
+int joystick_get_button_count(int joystick)
+{
+        return joystick_list[joystick]->button_count;
+}
+
+char *joystick_get_axis_name(int joystick, int id)
+{
+        return joystick_list[joystick]->axis_names[id];
+}
+
+char *joystick_get_button_name(int joystick, int id)
+{
+        return joystick_list[joystick]->button_names[id];
+}
+
+typedef struct gameport_axis_t
+{
+        int count;
+        int axis_nr;
+        struct gameport_t *gameport;
+} gameport_axis_t;
+        
+typedef struct gameport_t
+{
+        uint8_t state;
+        
+        gameport_axis_t axis[4];
+        
+        joystick_if_t *joystick;
+        void *joystick_dat;
+} gameport_t;
+
+static gameport_t *gameport_global = NULL;
+
+static int gameport_time(int axis)
+{
+        if (axis == AXIS_NOT_PRESENT)
+                return 0;
+
+        axis += 32768;
+        axis = (axis * 100) / 65; /*Axis now in ohms*/
+        axis = (axis * 11) / 1000;
+        return TIMER_USEC * (axis + 24); /*max = 11.115 ms*/
+}
+
+void gameport_write(uint16_t addr, uint8_t val, void *p)
+{
+        gameport_t *gameport = (gameport_t *)p;
+
+        timer_clock();
+        gameport->state |= 0x0f;
+//        pclog("gameport_write : joysticks_present=%i\n", joysticks_present);
+        
+        gameport->axis[0].count = gameport_time(gameport->joystick->read_axis(gameport->joystick_dat, 0));
+        gameport->axis[1].count = gameport_time(gameport->joystick->read_axis(gameport->joystick_dat, 1));
+        gameport->axis[2].count = gameport_time(gameport->joystick->read_axis(gameport->joystick_dat, 2));
+        gameport->axis[3].count = gameport_time(gameport->joystick->read_axis(gameport->joystick_dat, 3));
+
+        gameport->joystick->write(gameport->joystick_dat);
+        
+        cycles -= ISA_CYCLES(8);
+}
+
+uint8_t gameport_read(uint16_t addr, void *p)
+{
+        gameport_t *gameport = (gameport_t *)p;
+        uint8_t ret;
+
+        timer_clock();
+//        if (joysticks_present)
+                ret = gameport->state | gameport->joystick->read(gameport->joystick_dat);//0xf0;
+//        else
+//                ret = 0xff;
+
+//        pclog("gameport_read: ret=%02x %08x:%08x isa_cycles=%i  %i\n", ret, cs, cpu_state.pc, isa_cycles, gameport->axis[0].count);
+
+        cycles -= ISA_CYCLES(8);
+
+        return ret;
+}
+
+void gameport_timer_over(void *p)
+{
+        gameport_axis_t *axis = (gameport_axis_t *)p;
+        gameport_t *gameport = axis->gameport;
+        
+        gameport->state &= ~(1 << axis->axis_nr);
+        axis->count = 0;
+        
+        if (axis == &gameport->axis[0])
+                gameport->joystick->a0_over(gameport->joystick_dat);
+}
+
+void *gameport_init_common()
+{
+        gameport_t *gameport = malloc(sizeof(gameport_t));
+        
+        memset(gameport, 0, sizeof(gameport_t));
+        
+        gameport->axis[0].gameport = gameport;
+        gameport->axis[1].gameport = gameport;
+        gameport->axis[2].gameport = gameport;
+        gameport->axis[3].gameport = gameport;
+
+        gameport->axis[0].axis_nr = 0;
+        gameport->axis[1].axis_nr = 1;
+        gameport->axis[2].axis_nr = 2;
+        gameport->axis[3].axis_nr = 3;
+        
+        timer_add(gameport_timer_over, &gameport->axis[0].count, &gameport->axis[0].count, &gameport->axis[0]);
+        timer_add(gameport_timer_over, &gameport->axis[1].count, &gameport->axis[1].count, &gameport->axis[1]);
+        timer_add(gameport_timer_over, &gameport->axis[2].count, &gameport->axis[2].count, &gameport->axis[2]);
+        timer_add(gameport_timer_over, &gameport->axis[3].count, &gameport->axis[3].count, &gameport->axis[3]);
+  
+        gameport->joystick = joystick_list[joystick_type];            
+        gameport->joystick_dat = gameport->joystick->init();
+        
+        gameport_global = gameport;
+        
+        return gameport;
+}
+
+void gameport_update_joystick_type()
+{
+        gameport_t *gameport = gameport_global;
+        
+        gameport->joystick->close(gameport->joystick_dat);        
+        gameport->joystick = joystick_list[joystick_type];
+        gameport->joystick_dat = gameport->joystick->init();
+}
+
+void *gameport_init()
+{
+        gameport_t *gameport = gameport_init_common();
+
+        io_sethandler(0x0200, 0x0008, gameport_read, NULL, NULL, gameport_write, NULL, NULL, gameport);
+
+        return gameport;
+}
+
+void *gameport_201_init()
+{
+        gameport_t *gameport = gameport_init_common();
+
+        io_sethandler(0x0201, 0x0001, gameport_read, NULL, NULL, gameport_write, NULL, NULL, gameport);
+
+        return gameport;
+}
+
+void gameport_close(void *p)
+{
+        gameport_t *gameport = (gameport_t *)p;
+        
+        gameport->joystick->close(gameport->joystick_dat);
+
+        gameport_global = NULL;
+
+        free(gameport);
+}
+
+device_t gameport_device =
+{
+        "Game port",
+        0,
+        gameport_init,
+        gameport_close,
+        NULL,
+        NULL,
+        NULL,
+        NULL
+};
+
+device_t gameport_201_device =
+{
+        "Game port (port 201h only)",
+        0,
+        gameport_201_init,
+        gameport_close,
+        NULL,
+        NULL,
+        NULL,
+        NULL
+};