#include "ps2.h"
#include "timer.h"
+#include "registers.h"
+
/* PRIVATE VARIABLES **********************************************************/
PBIOS_DATA_AREA Bda;
static BOOLEAN BiosKbdBufferPush(WORD Data)
{
- /* Get the location of the element after the head */
- WORD NextElement = Bda->KeybdBufferHead + 2;
+ /* Get the location of the element after the tail */
+ WORD NextElement = Bda->KeybdBufferTail + sizeof(WORD);
/* Wrap it around if it's at or beyond the end */
if (NextElement >= Bda->KeybdBufferEnd) NextElement = Bda->KeybdBufferStart;
/* If it's full, fail */
- if (NextElement == Bda->KeybdBufferTail) return FALSE;
+ if (NextElement == Bda->KeybdBufferHead) return FALSE;
/* Put the value in the queue */
*((LPWORD)((ULONG_PTR)Bda + Bda->KeybdBufferTail)) = Data;
BOOLEAN BiosInitialize(VOID)
{
- INT i;
+ USHORT i;
WORD Offset = 0;
- LPWORD IntVecTable = (LPWORD)((ULONG_PTR)BaseAddress);
- LPBYTE BiosCode = (LPBYTE)((ULONG_PTR)BaseAddress + TO_LINEAR(BIOS_SEGMENT, 0));
+ LPWORD IntVecTable = (LPWORD)BaseAddress;
+ LPBYTE BiosCode = (LPBYTE)SEG_OFF_TO_PTR(BIOS_SEGMENT, 0);
/* Initialize the BDA */
- Bda = (PBIOS_DATA_AREA)((ULONG_PTR)BaseAddress + TO_LINEAR(BDA_SEGMENT, 0));
+ Bda = (PBIOS_DATA_AREA)SEG_OFF_TO_PTR(BDA_SEGMENT, 0);
Bda->EquipmentList = BIOS_EQUIPMENT_LIST;
Bda->KeybdBufferStart = FIELD_OFFSET(BIOS_DATA_AREA, KeybdBuffer);
Bda->KeybdBufferEnd = Bda->KeybdBufferStart + BIOS_KBD_BUFFER_SIZE * sizeof(WORD);
/* Generate ISR stubs and fill the IVT */
- for (i = 0; i < 256; i++)
+ for (i = 0x00; i <= 0xFF; i++)
{
IntVecTable[i * 2] = Offset;
IntVecTable[i * 2 + 1] = BIOS_SEGMENT;
- BiosCode[Offset++] = 0xFA; // cli
+ BiosCode[Offset++] = 0xFB; // sti
BiosCode[Offset++] = 0x6A; // push i
- BiosCode[Offset++] = (BYTE)i;
+ BiosCode[Offset++] = (UCHAR)i;
+
+ BiosCode[Offset++] = 0x6A; // push 0
+ BiosCode[Offset++] = 0x00;
+
+// BOP_SEQ:
+ BiosCode[Offset++] = 0xF8; // clc
BiosCode[Offset++] = LOBYTE(EMULATOR_BOP); // BOP sequence
BiosCode[Offset++] = HIBYTE(EMULATOR_BOP);
- BiosCode[Offset++] = LOBYTE(EMULATOR_INT_BOP);
- BiosCode[Offset++] = HIBYTE(EMULATOR_INT_BOP);
+ BiosCode[Offset++] = EMULATOR_INT_BOP;
- BiosCode[Offset++] = 0x44; // inc sp
- BiosCode[Offset++] = 0x44; // inc sp
+ BiosCode[Offset++] = 0x73; // jnc EXIT (offset +3)
+ BiosCode[Offset++] = 0x03;
+
+ // HACK: The following instruction should be HLT!
+ BiosCode[Offset++] = 0x90; // nop
+
+ BiosCode[Offset++] = 0xEB; // jmp BOP_SEQ (offset -9)
+ BiosCode[Offset++] = 0xF7;
+
+// EXIT:
+ BiosCode[Offset++] = 0x83; // add sp, 4
+ BiosCode[Offset++] = 0xC4;
+ BiosCode[Offset++] = 0x04;
BiosCode[Offset++] = 0xCF; // iret
}
WORD BiosPeekCharacter(VOID)
{
- WORD CharacterData;
-
- /* Check if there is a key available */
- if (Bda->KeybdBufferHead == Bda->KeybdBufferTail) return 0xFFFF;
+ WORD CharacterData = 0;
/* Get the key from the queue, but don't remove it */
- BiosKbdBufferTop(&CharacterData);
-
- return CharacterData;
+ if (BiosKbdBufferTop(&CharacterData)) return CharacterData;
+ else return 0xFFFF;
}
WORD BiosGetCharacter(VOID)
{
- WORD CharacterData;
- INPUT_RECORD InputRecord;
- DWORD Count;
+ WORD CharacterData = 0;
/* Check if there is a key available */
if (Bda->KeybdBufferHead != Bda->KeybdBufferTail)
}
else
{
- VgaRefreshDisplay(); // HACK: Waiting here blocks the emulator!!!
-
- while (TRUE)
- {
- /* Wait for a console event */
- WaitForSingleObject(BiosConsoleInput, INFINITE);
-
- /* Read the event, and make sure it's a keypress */
- if (!ReadConsoleInput(BiosConsoleInput, &InputRecord, 1, &Count)) continue;
- if (InputRecord.EventType != KEY_EVENT) continue;
- if (!InputRecord.Event.KeyEvent.bKeyDown) continue;
-
- /* Save the scan code and end the loop */
- CharacterData = (InputRecord.Event.KeyEvent.wVirtualScanCode << 8)
- | InputRecord.Event.KeyEvent.uChar.AsciiChar;
-
- break;
- }
+ /* Set the handler CF to repeat the BOP */
+ EmulatorSetFlag(EMULATOR_FLAG_CF);
}
return CharacterData;
VOID BiosVideoService(LPWORD Stack)
{
- DWORD Eax = EmulatorGetRegister(EMULATOR_REG_AX);
- DWORD Ecx = EmulatorGetRegister(EMULATOR_REG_CX);
- DWORD Edx = EmulatorGetRegister(EMULATOR_REG_DX);
- DWORD Ebx = EmulatorGetRegister(EMULATOR_REG_BX);
-
- switch (HIBYTE(Eax))
+ switch (getAH())
{
/* Set Video Mode */
case 0x00:
{
- BiosSetVideoMode(LOBYTE(Eax));
+ BiosSetVideoMode(getAL());
VgaClearMemory();
break;
}
case 0x01:
{
/* Update the BDA */
- Bda->CursorStartLine = HIBYTE(Ecx);
- Bda->CursorEndLine = LOBYTE(Ecx);
+ Bda->CursorStartLine = getCH();
+ Bda->CursorEndLine = getCL();
/* Modify the CRTC registers */
VgaWritePort(VGA_CRTC_INDEX, VGA_CRTC_CURSOR_START_REG);
/* Set Cursor Position */
case 0x02:
{
- BiosSetCursorPosition(HIBYTE(Edx), LOBYTE(Edx), HIBYTE(Ebx));
+ BiosSetCursorPosition(getDH(), getDL(), getBH());
break;
}
case 0x03:
{
/* Make sure the selected video page exists */
- if (HIBYTE(Ebx) >= BIOS_MAX_PAGES) break;
+ if (getBH() >= BIOS_MAX_PAGES) break;
/* Return the result */
- EmulatorSetRegister(EMULATOR_REG_AX, 0);
- EmulatorSetRegister(EMULATOR_REG_CX,
- (Bda->CursorStartLine << 8) | Bda->CursorEndLine);
- EmulatorSetRegister(EMULATOR_REG_DX, Bda->CursorPosition[HIBYTE(Ebx)]);
-
+ setAX(0);
+ setCX(MAKEWORD(Bda->CursorEndLine, Bda->CursorStartLine));
+ setDX(Bda->CursorPosition[getBH()]);
break;
}
* On modern BIOSes, this function returns 0
* so that we can ignore the other registers.
*/
- EmulatorSetRegister(EMULATOR_REG_AX, 0);
+ setAX(0);
break;
}
/* Select Active Display Page */
case 0x05:
{
- BiosSetVideoPage(LOBYTE(Eax));
+ BiosSetVideoPage(getAL());
break;
}
case 0x06:
case 0x07:
{
- SMALL_RECT Rectangle =
- {
- LOBYTE(Ecx),
- HIBYTE(Ecx),
- LOBYTE(Edx),
- HIBYTE(Edx)
- };
+ SMALL_RECT Rectangle = { getCL(), getCH(), getDL(), getDH() };
/* Call the internal function */
- BiosScrollWindow((HIBYTE(Eax) == 0x06) ? SCROLL_DIRECTION_UP
- : SCROLL_DIRECTION_DOWN,
- LOBYTE(Eax),
+ BiosScrollWindow((getAH() == 0x06) ? SCROLL_DIRECTION_UP
+ : SCROLL_DIRECTION_DOWN,
+ getAL(),
Rectangle,
Bda->VideoPage,
- HIBYTE(Ebx));
+ getBH());
break;
}
case 0x09:
case 0x0A:
{
- WORD CharacterData = MAKEWORD(LOBYTE(Eax), LOBYTE(Ebx));
- BYTE Page = HIBYTE(Ebx);
+ WORD CharacterData = MAKEWORD(getAL(), getBL());
+ BYTE Page = getBH();
DWORD Offset;
/* Check if the page exists */
if (Page >= BIOS_MAX_PAGES) break;
/* Find the offset of the character */
- Offset = Page * Bda->VideoPageSize
- + (HIBYTE(Bda->CursorPosition[Page]) * Bda->ScreenColumns
- + LOBYTE(Bda->CursorPosition[Page])) * 2;
+ Offset = Page * Bda->VideoPageSize +
+ (HIBYTE(Bda->CursorPosition[Page]) * Bda->ScreenColumns +
+ LOBYTE(Bda->CursorPosition[Page])) * 2;
- if (HIBYTE(Eax) == 0x08)
+ if (getAH() == 0x08)
{
/* Read from the video memory */
VgaReadMemory(TO_LINEAR(TEXT_VIDEO_SEG, Offset),
sizeof(WORD));
/* Return the character in AX */
- EmulatorSetRegister(EMULATOR_REG_AX, CharacterData);
+ setAX(CharacterData);
}
else
{
/* Write to video memory */
VgaWriteMemory(TO_LINEAR(TEXT_VIDEO_SEG, Offset),
(LPVOID)&CharacterData,
- (HIBYTE(Ebx) == 0x09) ? sizeof(WORD) : sizeof(BYTE));
+ (getBH() == 0x09) ? sizeof(WORD) : sizeof(BYTE));
}
break;
/* Teletype Output */
case 0x0E:
{
- BiosPrintCharacter(LOBYTE(Eax), LOBYTE(Ebx), HIBYTE(Ebx));
+ BiosPrintCharacter(getAL(), getBL(), getBH());
break;
}
/* Get Current Video Mode */
case 0x0F:
{
- EmulatorSetRegister(EMULATOR_REG_AX,
- MAKEWORD(Bda->VideoMode, Bda->ScreenColumns));
- EmulatorSetRegister(EMULATOR_REG_BX,
- MAKEWORD(LOBYTE(Ebx), Bda->VideoPage));
-
+ setAX(MAKEWORD(Bda->VideoMode, Bda->ScreenColumns));
+ setBX(MAKEWORD(getBL(), Bda->VideoPage));
break;
}
/* Scroll Window */
case 0x12:
{
- SMALL_RECT Rectangle =
- {
- LOBYTE(Ecx),
- HIBYTE(Ecx),
- LOBYTE(Edx),
- HIBYTE(Edx)
- };
+ SMALL_RECT Rectangle = { getCL(), getCH(), getDL(), getDH() };
/* Call the internal function */
- BiosScrollWindow(LOBYTE(Ebx),
- LOBYTE(Eax),
+ BiosScrollWindow(getBL(),
+ getAL(),
Rectangle,
Bda->VideoPage,
DEFAULT_ATTRIBUTE);
/* Display combination code */
case 0x1A:
{
- switch(LOBYTE(Eax))
+ switch(getAL())
{
case 0x00: /* Get Display combiantion code */
- EmulatorSetRegister(EMULATOR_REG_AX, MAKEWORD(0x1A, 0x1A));
- EmulatorSetRegister(EMULATOR_REG_BX, MAKEWORD(0x08, 0x0)); /* VGA w/ color analog display */
+ setAX(MAKEWORD(0x1A, 0x1A));
+ setBX(MAKEWORD(0x08, 0x00)); /* VGA w/ color analog display */
break;
case 0x01: /* Set Display combination code */
DPRINT1("Set Display combination code - Unsupported\n");
default:
{
DPRINT1("BIOS Function INT 10h, AH = 0x%02X NOT IMPLEMENTED\n",
- HIBYTE(Eax));
+ getAH());
}
}
}
VOID BiosKeyboardService(LPWORD Stack)
{
- DWORD Eax = EmulatorGetRegister(EMULATOR_REG_AX);
-
- switch (HIBYTE(Eax))
+ switch (getAH())
{
+ /* Wait for keystroke and read */
case 0x00:
+ /* Wait for extended keystroke and read */
+ case 0x10: // FIXME: Temporarily do the same as INT 16h, 00h
{
/* Read the character (and wait if necessary) */
- EmulatorSetRegister(EMULATOR_REG_AX, BiosGetCharacter());
-
+ setAX(BiosGetCharacter());
break;
}
+ /* Get keystroke status */
case 0x01:
+ /* Get extended keystroke status */
+ case 0x11: // FIXME: Temporarily do the same as INT 16h, 01h
{
WORD Data = BiosPeekCharacter();
if (Data != 0xFFFF)
{
/* There is a character, clear ZF and return it */
- EmulatorSetRegister(EMULATOR_REG_AX, Data);
Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_ZF;
+ setAX(Data);
}
else
{
break;
}
-
+
+ /* Get shift status */
+ case 0x02:
+ {
+ /* Return the lower byte of the keyboard shift status word */
+ setAL(LOBYTE(Bda->KeybdShiftFlags));
+ break;
+ }
+
+ /* Reserved */
+ case 0x04:
+ {
+ DPRINT1("BIOS Function INT 16h, AH = 0x04 is RESERVED\n");
+ break;
+ }
+
+ /* Push keystroke */
+ case 0x05:
+ {
+ /* Return 0 if success, 1 if failure */
+ setAL(BiosKbdBufferPush(getCX()) == FALSE);
+ break;
+ }
+
+ /* Get extended shift status */
+ case 0x12:
+ {
+ /*
+ * Be careful! The returned word is similar to Bda->KeybdShiftFlags
+ * but the high byte is organized differently:
+ * the bytes 2 and 3 of the high byte are not the same...
+ */
+ WORD KeybdShiftFlags = (Bda->KeybdShiftFlags & 0xF3FF);
+
+ /* Return the extended keyboard shift status word */
+ setAX(KeybdShiftFlags);
+ break;
+ }
+
default:
{
DPRINT1("BIOS Function INT 16h, AH = 0x%02X NOT IMPLEMENTED\n",
- HIBYTE(Eax));
+ getAH());
}
}
}
VOID BiosTimeService(LPWORD Stack)
{
- DWORD Eax = EmulatorGetRegister(EMULATOR_REG_AX);
- DWORD Ecx = EmulatorGetRegister(EMULATOR_REG_CX);
- DWORD Edx = EmulatorGetRegister(EMULATOR_REG_DX);
-
- switch (HIBYTE(Eax))
+ switch (getAH())
{
case 0x00:
{
/* Set AL to 1 if midnight had passed, 0 otherwise */
- Eax &= 0xFFFFFF00;
- if (Bda->MidnightPassed) Eax |= 1;
+ setAL(Bda->MidnightPassed ? 0x01 : 0x00);
/* Return the tick count in CX:DX */
- EmulatorSetRegister(EMULATOR_REG_AX, Eax);
- EmulatorSetRegister(EMULATOR_REG_CX, HIWORD(Bda->TickCounter));
- EmulatorSetRegister(EMULATOR_REG_DX, LOWORD(Bda->TickCounter));
+ setCX(HIWORD(Bda->TickCounter));
+ setDX(LOWORD(Bda->TickCounter));
/* Reset the midnight flag */
Bda->MidnightPassed = FALSE;
case 0x01:
{
/* Set the tick count to CX:DX */
- Bda->TickCounter = MAKELONG(LOWORD(Edx), LOWORD(Ecx));
+ Bda->TickCounter = MAKELONG(getDX(), getCX());
/* Reset the midnight flag */
Bda->MidnightPassed = FALSE;
default:
{
DPRINT1("BIOS Function INT 1Ah, AH = 0x%02X NOT IMPLEMENTED\n",
- HIBYTE(Eax));
+ getAH());
}
}
}
VOID BiosEquipmentService(LPWORD Stack)
{
/* Return the equipment list */
- EmulatorSetRegister(EMULATOR_REG_AX, Bda->EquipmentList);
+ setAX(Bda->EquipmentList);
}
VOID BiosHandleIrq(BYTE IrqNumber, LPWORD Stack)
{
/* Perform the system timer interrupt */
EmulatorInterrupt(BIOS_SYS_TIMER_INTERRUPT);
-
break;
}
{
BYTE ScanCode, VirtualKey;
WORD Character;
-
- /* Check if there is a scancode available */
- if (!(KeyboardReadStatus() & 1)) break;
- /* Get the scan code and virtual key code */
- ScanCode = KeyboardReadData();
- VirtualKey = MapVirtualKey(ScanCode & 0x7F, MAPVK_VSC_TO_VK);
-
- /* Check if this is a key press or release */
- if (!(ScanCode & (1 << 7)))
+ /* Loop while there is a scancode available */
+ do
{
- /* Key press */
- if (VirtualKey == VK_NUMLOCK
- || VirtualKey == VK_CAPITAL
- || VirtualKey == VK_SCROLL)
- {
- /* For toggle keys, toggle the lowest bit in the keyboard map */
- BiosKeyboardMap[VirtualKey] ^= ~(1 << 0);
- }
+ /* Get the scan code and virtual key code */
+ ScanCode = KeyboardReadData();
+ VirtualKey = MapVirtualKey(ScanCode & 0x7F, MAPVK_VSC_TO_VK);
- /* Set the highest bit */
- BiosKeyboardMap[VirtualKey] |= (1 << 7);
-
- /* Find out which character this is */
- if (ToAscii(VirtualKey, ScanCode, BiosKeyboardMap, &Character, 0) > 0)
+ /* Check if this is a key press or release */
+ if (!(ScanCode & (1 << 7)))
{
+ /* Key press */
+ if (VirtualKey == VK_NUMLOCK ||
+ VirtualKey == VK_CAPITAL ||
+ VirtualKey == VK_SCROLL ||
+ VirtualKey == VK_INSERT)
+ {
+ /* For toggle keys, toggle the lowest bit in the keyboard map */
+ BiosKeyboardMap[VirtualKey] ^= ~(1 << 0);
+ }
+
+ /* Set the highest bit */
+ BiosKeyboardMap[VirtualKey] |= (1 << 7);
+
+ /* Find out which character this is */
+ Character = 0;
+ if (ToAscii(VirtualKey, ScanCode, BiosKeyboardMap, &Character, 0) == 0)
+ {
+ /* Not ASCII */
+ Character = 0;
+ }
+
/* Push it onto the BIOS keyboard queue */
- BiosKbdBufferPush((ScanCode << 8) | (Character & 0xFF));
+ BiosKbdBufferPush(MAKEWORD(Character, ScanCode));
+ }
+ else
+ {
+ /* Key release, unset the highest bit */
+ BiosKeyboardMap[VirtualKey] &= ~(1 << 7);
}
}
- else
- {
- /* Key release, unset the highest bit */
- BiosKeyboardMap[VirtualKey] &= ~(1 << 7);
- }
+ while (KeyboardReadStatus() & 1);
+
+ /* Clear the keyboard flags */
+ Bda->KeybdShiftFlags = 0;
+
+ /* Set the appropriate flags based on the state */
+ if (BiosKeyboardMap[VK_RSHIFT] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_RSHIFT;
+ if (BiosKeyboardMap[VK_LSHIFT] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_LSHIFT;
+ if (BiosKeyboardMap[VK_CONTROL] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_CTRL;
+ if (BiosKeyboardMap[VK_MENU] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_ALT;
+ if (BiosKeyboardMap[VK_SCROLL] & (1 << 0)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_SCROLL_ON;
+ if (BiosKeyboardMap[VK_NUMLOCK] & (1 << 0)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_NUMLOCK_ON;
+ if (BiosKeyboardMap[VK_CAPITAL] & (1 << 0)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_CAPSLOCK_ON;
+ if (BiosKeyboardMap[VK_INSERT] & (1 << 0)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_INSERT_ON;
+ if (BiosKeyboardMap[VK_RMENU] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_RALT;
+ if (BiosKeyboardMap[VK_LMENU] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_LALT;
+ if (BiosKeyboardMap[VK_SNAPSHOT] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_SYSRQ;
+ if (BiosKeyboardMap[VK_PAUSE] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_PAUSE;
+ if (BiosKeyboardMap[VK_SCROLL] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_SCROLL;
+ if (BiosKeyboardMap[VK_NUMLOCK] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_NUMLOCK;
+ if (BiosKeyboardMap[VK_CAPITAL] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_CAPSLOCK;
+ if (BiosKeyboardMap[VK_INSERT] & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_INSERT;
break;
}
}
/* Send End-of-Interrupt to the PIC */
- if (IrqNumber > 8) PicWriteCommand(PIC_SLAVE_CMD, PIC_OCW2_EOI);
+ if (IrqNumber >= 8) PicWriteCommand(PIC_SLAVE_CMD, PIC_OCW2_EOI);
PicWriteCommand(PIC_MASTER_CMD, PIC_OCW2_EOI);
}
projects / reactos.git / blobdiff