86Box/src/mouse_serial.c

/* Copyright holders: Sarah Walker
   see COPYING for more details
*/
#include "ibm.h"
#include "mouse.h"
#include "pic.h"
#include "serial.h"
#include "timer.h"

static int oldb=0;

void mouse_serial_poll(int x, int y, int b)
{
        uint8_t mousedat[3];
        
        if (!(serial1.ier & 1))
                return;
        if (!x && !y && b==oldb) return;

        oldb=b;
        if (x>127) x=127;
        if (y>127) y=127;
        if (x<-128) x=-128;
        if (y<-128) y=-128;

        /*Use Microsoft format*/
        mousedat[0]=0x40;
        mousedat[0]|=(((y / 64)&3)<<2);
        mousedat[0]|=((x / 64)&3);
        if (b&1) mousedat[0]|=0x20;
        if (b&2) mousedat[0]|=0x10;
        mousedat[1]=x&0x3F;
        mousedat[2]=y&0x3F;
        
        if (!(serial1.mctrl&0x10))
        {
                // pclog("Serial data %02X %02X %02X\n", mousedat[0], mousedat[1], mousedat[2]);
                serial_write_fifo(&serial1, mousedat[0]);
                serial_write_fifo(&serial1, mousedat[1]);
                serial_write_fifo(&serial1, mousedat[2]);
        }
}

void mouse_serial_rcr(void *p)
{
        mousepos=-1;
        mousedelay=5000 * (1 << TIMER_SHIFT);
}
        
void mousecallback(void *p)
{
        SERIAL *serial = (SERIAL *)p;
	mousedelay = 0;
        if (mousepos == -1)
        {
                mousepos = 0;
/*                serial_fifo_read = serial_fifo_write = 0;
                serial.lsr &= ~1;*/
                serial_write_fifo(serial, 'M');
        }
/*        else if (serial_fifo_read != serial_fifo_write)
        {
                serial.iir=4;
                serial.lsr|=1;
                if (serial.mctrl&8) picint(0x10);
        }*/
}

void mouse_serial_init()
{
        mouse_poll = mouse_serial_poll;
        serial1.rcr_callback = mouse_serial_rcr;
        timer_add(mousecallback, &mousedelay, &mousedelay, &serial1);
}