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[NTVDM]
- Add dummy INT 18h (ROM Basic) and INT 19h (Bootstrap loader) interrupts. If INT 18h will never be implemented, INT 19h can be used one day... - Add the standard bootstrap code snippets at F000:FFF0 and F000:E05B. - For compatibility purposes, and nice info reporting via tools like Microsoft Diagnostics, or Symantec SysInfo, or whatever else..., register nice BIOS Copyright and Version strings. Also add a version string at the end of the BIOS. - Fix our reported BIOS model. - Add some temporary documentation (from Bochs BIOS) about the ROM BIOS compatibility entry-points that some apps may use (instead of passing through more documented & standard interfaces). svn path=/trunk/; revision=64185
This commit is contained in:
Hermès Bélusca-Maïto
parent
549d7bbce6
commit
7697e22142
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@ -112,8 +112,8 @@ typedef struct _BIOS_CONFIG_TABLE
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WORD Length; // 0x00
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BYTE Model; // 0x02
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BYTE SubModel; // 0x03
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BYTE BiosRevision; // 0x04
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BYTE BiosFeature[5]; // 0x05 -- 0x09
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BYTE Revision; // 0x04
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BYTE Feature[5]; // 0x05 -- 0x09
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// Other BIOSes may extend this table. We don't.
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} BIOS_CONFIG_TABLE, *PBIOS_CONFIG_TABLE;
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@ -10,6 +10,9 @@
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#define NDEBUG
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/* For BIOS Version number */
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#include <reactos/buildno.h>
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#include "emulator.h"
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#include "callback.h"
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#include "bop.h"
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@ -31,6 +34,105 @@
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CALLBACK16 BiosContext;
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/*
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Bochs BIOS, see rombios.h
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=========================
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// model byte 0xFC = AT
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#define SYS_MODEL_ID 0xFC
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#define SYS_SUBMODEL_ID 0x00
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#define BIOS_REVISION 1
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#define BIOS_CONFIG_TABLE 0xe6f5
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#ifndef BIOS_BUILD_DATE
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# define BIOS_BUILD_DATE "06/23/99"
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#endif
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// 1K of base memory used for Extended Bios Data Area (EBDA)
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// EBDA is used for PS/2 mouse support, and IDE BIOS, etc.
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#define EBDA_SEG 0x9FC0
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#define EBDA_SIZE 1 // In KiB
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#define BASE_MEM_IN_K (640 - EBDA_SIZE)
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See rombios.c
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=============
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ROM BIOS compatibility entry points:
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===================================
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$e05b ; POST Entry Point
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$e2c3 ; NMI Handler Entry Point
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$e3fe ; INT 13h Fixed Disk Services Entry Point
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$e401 ; Fixed Disk Parameter Table
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$e6f2 ; INT 19h Boot Load Service Entry Point
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$e6f5 ; Configuration Data Table
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$e729 ; Baud Rate Generator Table
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$e739 ; INT 14h Serial Communications Service Entry Point
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$e82e ; INT 16h Keyboard Service Entry Point
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$e987 ; INT 09h Keyboard Service Entry Point
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$ec59 ; INT 13h Diskette Service Entry Point
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$ef57 ; INT 0Eh Diskette Hardware ISR Entry Point
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$efc7 ; Diskette Controller Parameter Table
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$efd2 ; INT 17h Printer Service Entry Point
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$f045 ; INT 10 Functions 0-Fh Entry Point
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$f065 ; INT 10h Video Support Service Entry Point
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$f0a4 ; MDA/CGA Video Parameter Table (INT 1Dh)
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$f841 ; INT 12h Memory Size Service Entry Point
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$f84d ; INT 11h Equipment List Service Entry Point
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$f859 ; INT 15h System Services Entry Point
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$fa6e ; Character Font for 320x200 & 640x200 Graphics (lower 128 characters)
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$fe6e ; INT 1Ah Time-of-day Service Entry Point
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$fea5 ; INT 08h System Timer ISR Entry Point
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$fef3 ; Initial Interrupt Vector Offsets Loaded by POST
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$ff53 ; IRET Instruction for Dummy Interrupt Handler
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$ff54 ; INT 05h Print Screen Service Entry Point
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$fff0 ; Power-up Entry Point
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$fff5 ; ASCII Date ROM was built - 8 characters in MM/DD/YY
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$fffe ; System Model ID
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*/
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/*
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* See Ralf Brown: http://www.ctyme.com/intr/rb-1594.htm#Table515
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* for more information.
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*/
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#define BIOS_MODEL 0xFC // PC-AT
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#define BIOS_SUBMODEL 0x01 // AT models 319,339 8 MHz, Enh Keyb, 3.5"
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#define BIOS_REVISION 0x00
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// FIXME: Find a nice PS/2 486 + 487 BIOS combination!
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/*
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* WARNING! For compatibility purposes the string "IBM" should be at F000:E00E .
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* Some programs alternatively look at "COPR. IBM" that is at F000:E008 .
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*/
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static const CHAR BiosCopyright[] = "0000000 NTVDM IBM Compatible 486 32-bit BIOS Copyright (C) ReactOS Team 1996-2014";
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static const CHAR BiosVersion[] = "ReactOS NTVDM 32-bit BIOS "KERNEL_VERSION_STR" (Build "KERNEL_VERSION_BUILD_STR")";
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static const CHAR BiosDate[] = "06/17/13";
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C_ASSERT(sizeof(BiosCopyright)-1 <= 0x5B); // Ensures that we won't overflow on the POST Code starting at F000:E05B
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C_ASSERT(sizeof(BiosDate)-1 == 0x08);
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/* 16-bit bootstrap code at F000:FFF0 */
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static BYTE Bootstrap[] =
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{
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0xEA, // jmp far ptr
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0x5B, 0xE0, 0x00, 0xF0, // F000:E05B
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};
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/*
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* Normally at F000:E05B there is the POST that finally calls the bootstrap
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* interrupt. It should also check the value of Bda->SoftReset. Since we do
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* all the POST in 32 bit from the start, we just place there the bootstrap
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* interrupt call.
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*/
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static BYTE PostCode[] =
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{
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0xCD, 0x19, // int 0x19, the bootstrap loader interrupt
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// LOBYTE(EMULATOR_BOP), HIBYTE(EMULATOR_BOP), BOP_UNSIMULATE
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};
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/* PRIVATE FUNCTIONS **********************************************************/
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static VOID WINAPI BiosException(LPWORD Stack)
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@ -143,6 +245,30 @@ static VOID WINAPI BiosMiscService(LPWORD Stack)
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}
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}
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static VOID WINAPI BiosRomBasic(LPWORD Stack)
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{
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/* ROM Basic is unsupported, display a message to the user */
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DisplayMessage(L"NTVDM doesn't support ROM Basic. The VDM is closing.");
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/* Stop the VDM */
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EmulatorTerminate();
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return;
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}
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static VOID WINAPI BiosBootstrapLoader(LPWORD Stack)
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{
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/*
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* In real bioses one loads the bootsector read from a diskette
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* or from a disk, to 0000:7C00 and then one runs it.
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* Since we are 32-bit VM and we hardcode our DOS at the moment,
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* just call the DOS 32-bit initialization code.
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*/
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DPRINT1("BiosBootstrapLoader -->\n");
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DPRINT1("<-- BiosBootstrapLoader\n");
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}
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static VOID WINAPI BiosTimeService(LPWORD Stack)
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{
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switch (getAH())
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@ -240,7 +366,7 @@ static VOID WINAPI BiosHandleMasterPicIRQ(LPWORD Stack)
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IOWriteB(PIC_MASTER_CMD, PIC_OCW3_READ_ISR /* == 0x0B */);
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IrqNumber = IOReadB(PIC_MASTER_CMD);
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DPRINT("Master - IrqNumber = 0x%x\n", IrqNumber);
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DPRINT("Master - IrqNumber = 0x%02X\n", IrqNumber);
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PicIRQComplete(Stack);
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}
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@ -252,7 +378,7 @@ static VOID WINAPI BiosHandleSlavePicIRQ(LPWORD Stack)
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IOWriteB(PIC_SLAVE_CMD, PIC_OCW3_READ_ISR /* == 0x0B */);
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IrqNumber = IOReadB(PIC_SLAVE_CMD);
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DPRINT("Slave - IrqNumber = 0x%x\n", IrqNumber);
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DPRINT("Slave - IrqNumber = 0x%02X\n", IrqNumber);
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PicIRQComplete(Stack);
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}
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@ -348,6 +474,8 @@ static VOID InitializeBiosInt32(VOID)
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RegisterBiosInt32(BIOS_EQUIPMENT_INTERRUPT, BiosEquipmentService );
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RegisterBiosInt32(BIOS_MEMORY_SIZE , BiosGetMemorySize );
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RegisterBiosInt32(BIOS_MISC_INTERRUPT , BiosMiscService );
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RegisterBiosInt32(BIOS_ROM_BASIC , BiosRomBasic );
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RegisterBiosInt32(BIOS_BOOTSTRAP_LOADER , BiosBootstrapLoader );
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RegisterBiosInt32(BIOS_TIME_INTERRUPT , BiosTimeService );
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RegisterBiosInt32(BIOS_SYS_TIMER_INTERRUPT, BiosSystemTimerInterrupt);
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@ -361,21 +489,33 @@ static VOID InitializeBiosInt32(VOID)
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static VOID InitializeBiosInfo(VOID)
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{
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Bct->Length = sizeof(*Bct);
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Bct->Model = 0xFC; // PC-AT; see http://www.ctyme.com/intr/rb-1594.htm#Table515
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Bct->SubModel = 0x00;
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Bct->BiosRevision = 0x01;
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Bct->BiosFeature[0] = 0x64; // At the moment we don't support "INT 15/AH=4Fh called upon INT 09h" nor "wait for external event (INT 15/AH=41h) supported"; see http://www.ctyme.com/intr/rb-1594.htm#Table510
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Bct->BiosFeature[1] = 0x00; // We don't support anything from here; see http://www.ctyme.com/intr/rb-1594.htm#Table511
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Bct->BiosFeature[2] = 0x00;
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Bct->BiosFeature[3] = 0x00;
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Bct->BiosFeature[4] = 0x00;
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Bct->Length = sizeof(*Bct);
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Bct->Model = BIOS_MODEL;
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Bct->SubModel = BIOS_SUBMODEL;
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Bct->Revision = BIOS_REVISION;
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Bct->Feature[0] = 0x64; // At the moment we don't support "INT 15/AH=4Fh called upon INT 09h" nor "wait for external event (INT 15/AH=41h) supported"; see http://www.ctyme.com/intr/rb-1594.htm#Table510
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Bct->Feature[1] = 0x00; // We don't support anything from here; see http://www.ctyme.com/intr/rb-1594.htm#Table511
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Bct->Feature[2] = 0x00;
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Bct->Feature[3] = 0x00;
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Bct->Feature[4] = 0x00;
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}
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static VOID InitializeBiosData(VOID)
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{
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UCHAR Low, High;
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/* System BIOS Copyright */
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RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xE000), BiosCopyright, sizeof(BiosCopyright)-1);
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/* System BIOS Version */
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RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xE080), BiosVersion, sizeof(BiosVersion)-1); // FIXME: or E061, or E100 ??
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/* System BIOS Date */
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RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xFFF5), BiosDate, sizeof(BiosDate)-1);
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/* System BIOS Model (same as Bct->Model) */
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*(PBYTE)(SEG_OFF_TO_PTR(0xF000, 0xFFFE)) = BIOS_MODEL;
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/* Initialize the BDA contents */
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Bda->EquipmentList = BIOS_EQUIPMENT_LIST;
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@ -431,6 +571,10 @@ BOOLEAN Bios32Initialize(VOID)
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SearchAndInitRoms(&BiosContext);
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/* Bootstrap code */
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RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xE05B), PostCode , sizeof(PostCode ));
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RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xFFF0), Bootstrap, sizeof(Bootstrap));
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/* We are done */
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return TRUE;
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}
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@ -24,6 +24,8 @@
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#define BIOS_EQUIPMENT_INTERRUPT 0x11
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#define BIOS_MEMORY_SIZE 0x12
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#define BIOS_MISC_INTERRUPT 0x15
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#define BIOS_ROM_BASIC 0x18
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#define BIOS_BOOTSTRAP_LOADER 0x19
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#define BIOS_TIME_INTERRUPT 0x1A
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#define BIOS_SYS_TIMER_INTERRUPT 0x1C
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