void set_cursor(int offset){
offset /= 2;
//select the internal register 14 and 15 of display
//to write the high byte and low byte of the new
//cursor offset.
write_port_byte(DISPLAY_CTRL_PORT, CURSOR_LOW_BYTE);
write_port_byte(DISPLAY_DATA_PORT, (unsigned char)offset);
write_port_byte(DISPLAY_CTRL_PORT, CURSOR_HIGH_BYTE);
write_port_byte(DISPLAY_DATA_PORT, (unsigned char)(offset >> 8));
}
int get_cursor(){
//select the internal register 14 and 15 of display
//to read the high byte and low byte of the cursor
//offset.
int offset;
write_port_byte(DISPLAY_CTRL_PORT, CURSOR_HIGH_BYTE);
offset = read_port_byte(DISPLAY_DATA_PORT) << 8;
write_port_byte(DISPLAY_CTRL_PORT, CURSOR_LOW_BYTE);
offset += read_port_byte(DISPLAY_DATA_PORT);
return offset * 2;
}
static void PREFIX186(_outsb)(i8086_state *cpustate) /* Opcode 0x6e */
{
#ifdef I80286
if (PM && (CPL>IOPL)) throw TRAP(GENERAL_PROTECTION_FAULT, 0);
#endif
ICOUNT -= timing.outs8;
write_port_byte(cpustate->regs.w[DX],GetMemB(DS,cpustate->regs.w[SI]));
cpustate->regs.w[SI] += cpustate->DirVal; /* GOL 11/27/01 */
}
static void PREFIX186(_outsb)(void) /* Opcode 0x6e */
{
ICOUNT -= cycles.outs8;
write_port_byte(I.regs.w[DX],GetMemB(DS,I.regs.w[SI]));
I.regs.w[SI] += I.DirVal; /* GOL 11/27/01 */
}
static void PREFIX186(_outsb)(i8086_state *cpustate) /* Opcode 0x6e */
{
ICOUNT -= timing.outs8;
write_port_byte(cpustate->regs.w[DX],GetMemB(DS,cpustate->regs.w[SI]));
cpustate->regs.w[SI] += cpustate->DirVal; /* GOL 11/27/01 */
}
