[hbelusca] 64185: [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 bootstra...
18 Sep
2014
18 Sep
'14
12:16 a.m.
Author: hbelusca
Date: Thu Sep 18 00:16:17 2014
New Revision: 64185
URL: http://svn.reactos.org/svn/reactos?rev=64185&view=rev
Log:
[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).
Modified:
trunk/reactos/subsystems/ntvdm/bios/bios.h
trunk/reactos/subsystems/ntvdm/bios/bios32/bios32.c
trunk/reactos/subsystems/ntvdm/bios/bios32/bios32p.h
Modified: trunk/reactos/subsystems/ntvdm/bios/bios.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/bios/bios…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/bios/bios.h [iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/bios/bios.h [iso-8859-1] Thu Sep 18 00:16:17 2014
@@ -112,8 +112,8 @@
WORD Length; // 0x00
BYTE Model; // 0x02
BYTE SubModel; // 0x03
- BYTE BiosRevision; // 0x04
- BYTE BiosFeature[5]; // 0x05 -- 0x09
+ BYTE Revision; // 0x04
+ BYTE Feature[5]; // 0x05 -- 0x09
// Other BIOSes may extend this table. We don't.
} BIOS_CONFIG_TABLE, *PBIOS_CONFIG_TABLE;
Modified: trunk/reactos/subsystems/ntvdm/bios/bios32/bios32.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/bios/bios…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/bios/bios32/bios32.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/bios/bios32/bios32.c [iso-8859-1] Thu Sep 18 00:16:17
2014
@@ -10,6 +10,9 @@
#define NDEBUG
+/* For BIOS Version number */
+#include <reactos/buildno.h>
+
#include "emulator.h"
#include "callback.h"
#include "bop.h"
@@ -30,6 +33,105 @@
/* PRIVATE VARIABLES **********************************************************/
CALLBACK16 BiosContext;
+
+/*
+
+Bochs BIOS, see rombios.h
+=========================
+
+// model byte 0xFC = AT
+#define SYS_MODEL_ID 0xFC
+#define SYS_SUBMODEL_ID 0x00
+#define BIOS_REVISION 1
+#define BIOS_CONFIG_TABLE 0xe6f5
+
+#ifndef BIOS_BUILD_DATE
+# define BIOS_BUILD_DATE "06/23/99"
+#endif
+
+// 1K of base memory used for Extended Bios Data Area (EBDA)
+// EBDA is used for PS/2 mouse support, and IDE BIOS, etc.
+#define EBDA_SEG 0x9FC0
+#define EBDA_SIZE 1 // In KiB
+#define BASE_MEM_IN_K (640 - EBDA_SIZE)
+
+
+See rombios.c
+=============
+
+ROM BIOS compatibility entry points:
+===================================
+$e05b ; POST Entry Point
+$e2c3 ; NMI Handler Entry Point
+$e3fe ; INT 13h Fixed Disk Services Entry Point
+$e401 ; Fixed Disk Parameter Table
+$e6f2 ; INT 19h Boot Load Service Entry Point
+$e6f5 ; Configuration Data Table
+$e729 ; Baud Rate Generator Table
+$e739 ; INT 14h Serial Communications Service Entry Point
+$e82e ; INT 16h Keyboard Service Entry Point
+$e987 ; INT 09h Keyboard Service Entry Point
+$ec59 ; INT 13h Diskette Service Entry Point
+$ef57 ; INT 0Eh Diskette Hardware ISR Entry Point
+$efc7 ; Diskette Controller Parameter Table
+$efd2 ; INT 17h Printer Service Entry Point
+$f045 ; INT 10 Functions 0-Fh Entry Point
+$f065 ; INT 10h Video Support Service Entry Point
+$f0a4 ; MDA/CGA Video Parameter Table (INT 1Dh)
+$f841 ; INT 12h Memory Size Service Entry Point
+$f84d ; INT 11h Equipment List Service Entry Point
+$f859 ; INT 15h System Services Entry Point
+$fa6e ; Character Font for 320x200 & 640x200 Graphics (lower 128 characters)
+$fe6e ; INT 1Ah Time-of-day Service Entry Point
+$fea5 ; INT 08h System Timer ISR Entry Point
+$fef3 ; Initial Interrupt Vector Offsets Loaded by POST
+$ff53 ; IRET Instruction for Dummy Interrupt Handler
+$ff54 ; INT 05h Print Screen Service Entry Point
+$fff0 ; Power-up Entry Point
+$fff5 ; ASCII Date ROM was built - 8 characters in MM/DD/YY
+$fffe ; System Model ID
+
+*/
+
+/*
+ * See Ralf Brown: http://www.ctyme.com/intr/rb-1594.htm#Table515
+ * for more information.
+ */
+#define BIOS_MODEL 0xFC // PC-AT
+#define BIOS_SUBMODEL 0x01 // AT models 319,339 8 MHz, Enh Keyb, 3.5"
+#define BIOS_REVISION 0x00
+// FIXME: Find a nice PS/2 486 + 487 BIOS combination!
+
+/*
+ * WARNING! For compatibility purposes the string "IBM" should be at F000:E00E
.
+ * Some programs alternatively look at "COPR. IBM" that is at F000:E008 .
+ */
+static const CHAR BiosCopyright[] = "0000000 NTVDM IBM Compatible 486 32-bit BIOS
Copyright (C) ReactOS Team 1996-2014";
+static const CHAR BiosVersion[] = "ReactOS NTVDM 32-bit BIOS
"KERNEL_VERSION_STR" (Build "KERNEL_VERSION_BUILD_STR")";
+static const CHAR BiosDate[] = "06/17/13";
+
+C_ASSERT(sizeof(BiosCopyright)-1 <= 0x5B); // Ensures that we won't overflow on
the POST Code starting at F000:E05B
+C_ASSERT(sizeof(BiosDate)-1 == 0x08);
+
+/* 16-bit bootstrap code at F000:FFF0 */
+static BYTE Bootstrap[] =
+{
+ 0xEA, // jmp far ptr
+ 0x5B, 0xE0, 0x00, 0xF0, // F000:E05B
+};
+
+/*
+ * Normally at F000:E05B there is the POST that finally calls the bootstrap
+ * interrupt. It should also check the value of Bda->SoftReset. Since we do
+ * all the POST in 32 bit from the start, we just place there the bootstrap
+ * interrupt call.
+ */
+static BYTE PostCode[] =
+{
+ 0xCD, 0x19, // int 0x19, the bootstrap loader interrupt
+// LOBYTE(EMULATOR_BOP), HIBYTE(EMULATOR_BOP), BOP_UNSIMULATE
+};
+
/* PRIVATE FUNCTIONS **********************************************************/
@@ -141,6 +243,30 @@
getAH());
}
}
+}
+
+static VOID WINAPI BiosRomBasic(LPWORD Stack)
+{
+ /* ROM Basic is unsupported, display a message to the user */
+ DisplayMessage(L"NTVDM doesn't support ROM Basic. The VDM is
closing.");
+
+ /* Stop the VDM */
+ EmulatorTerminate();
+ return;
+}
+
+static VOID WINAPI BiosBootstrapLoader(LPWORD Stack)
+{
+ /*
+ * In real bioses one loads the bootsector read from a diskette
+ * or from a disk, to 0000:7C00 and then one runs it.
+ * Since we are 32-bit VM and we hardcode our DOS at the moment,
+ * just call the DOS 32-bit initialization code.
+ */
+
+ DPRINT1("BiosBootstrapLoader -->\n");
+
+ DPRINT1("<-- BiosBootstrapLoader\n");
}
static VOID WINAPI BiosTimeService(LPWORD Stack)
@@ -240,7 +366,7 @@
IOWriteB(PIC_MASTER_CMD, PIC_OCW3_READ_ISR /* == 0x0B */);
IrqNumber = IOReadB(PIC_MASTER_CMD);
- DPRINT("Master - IrqNumber = 0x%x\n", IrqNumber);
+ DPRINT("Master - IrqNumber = 0x%02X\n", IrqNumber);
PicIRQComplete(Stack);
}
@@ -252,7 +378,7 @@
IOWriteB(PIC_SLAVE_CMD, PIC_OCW3_READ_ISR /* == 0x0B */);
IrqNumber = IOReadB(PIC_SLAVE_CMD);
- DPRINT("Slave - IrqNumber = 0x%x\n", IrqNumber);
+ DPRINT("Slave - IrqNumber = 0x%02X\n", IrqNumber);
PicIRQComplete(Stack);
}
@@ -348,6 +474,8 @@
RegisterBiosInt32(BIOS_EQUIPMENT_INTERRUPT, BiosEquipmentService );
RegisterBiosInt32(BIOS_MEMORY_SIZE , BiosGetMemorySize );
RegisterBiosInt32(BIOS_MISC_INTERRUPT , BiosMiscService );
+ RegisterBiosInt32(BIOS_ROM_BASIC , BiosRomBasic );
+ RegisterBiosInt32(BIOS_BOOTSTRAP_LOADER , BiosBootstrapLoader );
RegisterBiosInt32(BIOS_TIME_INTERRUPT , BiosTimeService );
RegisterBiosInt32(BIOS_SYS_TIMER_INTERRUPT, BiosSystemTimerInterrupt);
@@ -361,20 +489,32 @@
static VOID InitializeBiosInfo(VOID)
{
- Bct->Length = sizeof(*Bct);
- Bct->Model = 0xFC; // PC-AT; see
http://www.ctyme.com/intr/rb-1594.htm#Table515
- Bct->SubModel = 0x00;
- Bct->BiosRevision = 0x01;
- 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
- Bct->BiosFeature[1] = 0x00; // We don't support anything from here; see
http://www.ctyme.com/intr/rb-1594.htm#Table511
- Bct->BiosFeature[2] = 0x00;
- Bct->BiosFeature[3] = 0x00;
- Bct->BiosFeature[4] = 0x00;
+ Bct->Length = sizeof(*Bct);
+ Bct->Model = BIOS_MODEL;
+ Bct->SubModel = BIOS_SUBMODEL;
+ Bct->Revision = BIOS_REVISION;
+ 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
+ Bct->Feature[1] = 0x00; // We don't support anything from here; see
http://www.ctyme.com/intr/rb-1594.htm#Table511
+ Bct->Feature[2] = 0x00;
+ Bct->Feature[3] = 0x00;
+ Bct->Feature[4] = 0x00;
}
static VOID InitializeBiosData(VOID)
{
UCHAR Low, High;
+
+ /* System BIOS Copyright */
+ RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xE000), BiosCopyright,
sizeof(BiosCopyright)-1);
+
+ /* System BIOS Version */
+ RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xE080), BiosVersion, sizeof(BiosVersion)-1); //
FIXME: or E061, or E100 ??
+
+ /* System BIOS Date */
+ RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xFFF5), BiosDate, sizeof(BiosDate)-1);
+
+ /* System BIOS Model (same as Bct->Model) */
+ *(PBYTE)(SEG_OFF_TO_PTR(0xF000, 0xFFFE)) = BIOS_MODEL;
/* Initialize the BDA contents */
Bda->EquipmentList = BIOS_EQUIPMENT_LIST;
@@ -431,6 +571,10 @@
SearchAndInitRoms(&BiosContext);
+ /* Bootstrap code */
+ RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xE05B), PostCode , sizeof(PostCode ));
+ RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xFFF0), Bootstrap, sizeof(Bootstrap));
+
/* We are done */
return TRUE;
}
Modified: trunk/reactos/subsystems/ntvdm/bios/bios32/bios32p.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/bios/bios…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/bios/bios32/bios32p.h [iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/bios/bios32/bios32p.h [iso-8859-1] Thu Sep 18 00:16:17
2014
@@ -24,6 +24,8 @@
#define BIOS_EQUIPMENT_INTERRUPT 0x11
#define BIOS_MEMORY_SIZE 0x12
#define BIOS_MISC_INTERRUPT 0x15
+#define BIOS_ROM_BASIC 0x18
+#define BIOS_BOOTSTRAP_LOADER 0x19
#define BIOS_TIME_INTERRUPT 0x1A
#define BIOS_SYS_TIMER_INTERRUPT 0x1C
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