void KEYBOARD_Reset() {
/* Init the keyb struct */
keyb.active=true;
keyb.scanning=true;
keyb.pending_key=-1;
keyb.auxactive=false;
keyb.pending_key_state=false;
keyb.command=CMD_NONE;
keyb.aux_command=ACMD_NONE;
keyb.p60changed=false;
keyb.auxchanged=false;
keyb.led_state = 0x00;
keyb.repeat.key=KBD_NONE;
keyb.repeat.pause=200;
keyb.repeat.rate=33;
keyb.repeat.wait=0;
keyb.leftctrl_pressed=false;
keyb.rightctrl_pressed=false;
keyb.scanset=1;
/* command byte */
keyb.cb_override_inhibit=false;
keyb.cb_irq12=false;
keyb.cb_irq1=true;
keyb.cb_xlat=true;
keyb.cb_sys=true;
keyb.reset=false;
/* OK */
KEYBOARD_ClrBuffer();
KEYBOARD_SetLEDs(0);
}
static void KEYBOARD_ResetDelay(Bitu val) {
keyb.reset=false;
KEYBOARD_SetLEDs(0);
KEYBOARD_Add8042Response(0x00); /* BAT */
}
static void write_p60(Bitu port,Bitu val,Bitu iolen) {
switch (keyb.command) {
case CMD_NONE: /* None */
if (keyb.reset)
return;
/* No active command this would normally get sent to the keyboard then */
KEYBOARD_ClrBuffer();
switch (val) {
case 0xed: /* Set Leds */
keyb.command=CMD_SETLEDS;
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
break;
case 0xee: /* Echo */
KEYBOARD_AddBuffer(0xee); /* JC: The correct response is 0xEE, not 0xFA */
break;
case 0xf0: /* set scancode set */
keyb.command=CMD_SETSCANSET;
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
break;
case 0xf2: /* Identify keyboard */
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
KEYBOARD_AddBuffer(0xab); /* ID */
KEYBOARD_AddBuffer(0x83);
break;
case 0xf3: /* Typematic rate programming */
keyb.command=CMD_SETTYPERATE;
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
break;
case 0xf4: /* Enable keyboard,clear buffer, start scanning */
LOG(LOG_KEYBOARD,LOG_NORMAL)("Clear buffer, enable scanning");
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
keyb.scanning=true;
break;
case 0xf5: /* Reset keyboard and disable scanning */
LOG(LOG_KEYBOARD,LOG_NORMAL)("Reset, disable scanning");
keyb.scanning=false;
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
break;
case 0xf6: /* Reset keyboard and enable scanning */
LOG(LOG_KEYBOARD,LOG_NORMAL)("Reset, enable scanning");
keyb.scanning=true; /* JC: Original DOSBox code was wrong, this command enables scanning */
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
break;
case 0xff: /* keyboard resets take a long time (about 250ms), most keyboards flash the LEDs during reset */
KEYBOARD_Reset();
KEYBOARD_Add8042Response(0xFA); /* ACK */
KEYBOARD_Add8042Response(0xAA); /* SELF TEST OK (TODO: Need delay!) */
keyb.reset=true;
KEYBOARD_SetLEDs(7); /* most keyboard I test with tend to flash the LEDs during reset */
PIC_AddEvent(KEYBOARD_ResetDelay,RESETDELAY);
break;
default:
/* Just always acknowledge strange commands */
LOG(LOG_KEYBOARD,LOG_ERROR)("60:Unhandled command %X",(int)val);
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
}
return;
case CMD_SETSCANSET:
keyb.command=CMD_NONE;
if (val == 0) { /* just asking */
if (keyb.cb_xlat) {
switch (keyb.scanset) {
case 1: KEYBOARD_AddBuffer(0x43); break;
case 2: KEYBOARD_AddBuffer(0x41); break;
case 3: KEYBOARD_AddBuffer(0x3F); break;
}
}
else {
KEYBOARD_AddBuffer(keyb.scanset);
}
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
}
else {
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
KEYBOARD_AddBuffer(0xfa); /* Acknowledge again */
if (val > 3) val = 3;
keyb.scanset = val;
}
break;
case CMD_WRITEAUX:
keyb.command=CMD_NONE;
KEYBOARD_AUX_Write(val);
break;
case CMD_WRITEOUTPUT:
keyb.command=CMD_NONE;
KEYBOARD_ClrBuffer();
KEYBOARD_AddBuffer(val); /* and now you return the byte as if it were typed in */
break;
case CMD_WRITEAUXOUT:
KEYBOARD_AddBuffer(AUX|val); /* stuff into AUX output */
break;
case CMD_SETOUTPORT:
if (!(val & 1)) {
if (allow_keyb_reset) {
LOG_MSG("Restart by keyboard controller requested\n");
On_Software_CPU_Reset();
}
else {
LOG_MSG("WARNING: Keyboard output port written with bit 1 clear. Is the guest OS or application attempting to reset the system?\n");
}
}
MEM_A20_Enable((val & 2)>0);
keyb.command = CMD_NONE;
break;
case CMD_SETTYPERATE:
if (keyb.reset)
return;
{
static const int delay[] = { 250, 500, 750, 1000 };
static const int repeat[] =
{ 33,37,42,46,50,54,58,63,67,75,83,92,100,
109,118,125,133,149,167,182,200,217,233,
250,270,303,333,370,400,435,476,500 };
keyb.repeat.pause = delay[(val >> 5) & 3];
keyb.repeat.rate = repeat[val & 0x1f];
keyb.command = CMD_NONE;
KEYBOARD_ClrBuffer();
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
}
break;
case CMD_SETLEDS:
if (keyb.reset)
return;
keyb.command=CMD_NONE;
KEYBOARD_ClrBuffer();
KEYBOARD_AddBuffer(0xfa); /* Acknowledge */
KEYBOARD_SetLEDs(val&7);
break;
case CMD_SETCOMMAND: /* 8042 command, not keyboard */
/* TODO: If biosps2=true and aux=false, disallow the guest OS from changing AUX port parameters including IRQ */
keyb.command=CMD_NONE;
keyb.cb_xlat = (val >> 6) & 1;
keyb.auxactive = !((val >> 5) & 1);
keyb.active = !((val >> 4) & 1);
keyb.cb_sys = (val >> 2) & 1;
keyb.cb_irq12 = (val >> 1) & 1;
keyb.cb_irq1 = (val >> 0) & 1;
if (keyb.used && !keyb.scheduled && !keyb.p60changed && keyb.active) {
keyb.scheduled=true;
PIC_AddEvent(KEYBOARD_TransferBuffer,KEYDELAY);
}
break;
}
}