[hbelusca] 63367: [NTVDM] - Initialize the BIOS Configuration Table, see http://www.ctyme.com/intr/rb-1594.htm for more information. - Implement INT 15h, AH=C0h "GET CONFIGURATION".
19 May
2014
19 May
'14
2:21 a.m.
Author: hbelusca
Date: Mon May 19 02:21:49 2014
New Revision: 63367
URL: http://svn.reactos.org/svn/reactos?rev=63367&view=rev
Log:
[NTVDM]
- Initialize the BIOS Configuration Table, see http://www.ctyme.com/intr/rb-1594.htm for
more information.
- Implement INT 15h, AH=C0h "GET CONFIGURATION".
Modified:
trunk/reactos/subsystems/ntvdm/bios/bios.c
trunk/reactos/subsystems/ntvdm/bios/bios.h
trunk/reactos/subsystems/ntvdm/bios/bios32/bios32.c
Modified: trunk/reactos/subsystems/ntvdm/bios/bios.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/bios/bios…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/bios/bios.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/bios/bios.c [iso-8859-1] Mon May 19 02:21:49 2014
@@ -37,6 +37,7 @@
static CALLBACK16 __BiosContext;
PBIOS_DATA_AREA Bda;
+PBIOS_CONFIG_TABLE Bct;
/* PRIVATE FUNCTIONS **********************************************************/
@@ -134,8 +135,10 @@
/* Disable interrupts */
setIF(0);
- /* Initialize the BDA pointer */
- Bda = (PBIOS_DATA_AREA)SEG_OFF_TO_PTR(BDA_SEGMENT, 0);
+ /* Initialize the BDA and the BCT pointers */
+ Bda = (PBIOS_DATA_AREA)SEG_OFF_TO_PTR(BDA_SEGMENT, 0x0000);
+ // The BCT is found at F000:E6F5 for 100% compatible BIOSes.
+ Bct = (PBIOS_CONFIG_TABLE)SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xE6F5);
/* Register the BIOS support BOPs */
RegisterBop(BOP_BIOSINIT , BiosInitBop);
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] Mon May 19 02:21:49 2014
@@ -22,6 +22,8 @@
#define BIOS_EQUIPMENT_LIST 0x2C // HACK: Disable FPU for now
+#pragma pack(push, 1)
+
/*
* BIOS Data Area at 0040:XXXX
*
@@ -29,7 +31,6 @@
* and: http://www.bioscentral.com/misc/bda.htm
* for more information.
*/
-#pragma pack(push, 1)
typedef struct
{
WORD SerialPorts[4]; // 0x00
@@ -96,13 +97,30 @@
BYTE Reserved17[15]; // 0x121
BYTE Reserved18[3]; // 0x130
} BIOS_DATA_AREA, *PBIOS_DATA_AREA;
+C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x133);
+
+/*
+ * BIOS Configuration Table at F000:E6F5 for 100% compatible BIOSes.
+ *
+ * See: http://www.ctyme.com/intr/rb-1594.htm
+ * for more information.
+ */
+typedef struct _BIOS_CONFIG_TABLE
+{
+ WORD Length; // 0x00
+ BYTE Model; // 0x02
+ BYTE SubModel; // 0x03
+ BYTE BiosRevision; // 0x04
+ BYTE BiosFeature[5]; // 0x05 -- 0x09
+ // Other BIOSes may extend this table. We don't.
+} BIOS_CONFIG_TABLE, *PBIOS_CONFIG_TABLE;
+
#pragma pack(pop)
-
-C_ASSERT(sizeof(BIOS_DATA_AREA) == 0x133);
/* FUNCTIONS ******************************************************************/
extern PBIOS_DATA_AREA Bda;
+extern PBIOS_CONFIG_TABLE Bct;
VOID WINAPI BiosEquipmentService(LPWORD Stack);
VOID WINAPI BiosGetMemorySize(LPWORD Stack);
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] Mon May 19 02:21:49
2014
@@ -107,6 +107,20 @@
setAX(MAKEWORD(Low, High));
/* Clear CF */
+ Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
+
+ break;
+ }
+
+ /* Get Configuration */
+ case 0xC0:
+ {
+ /* Return the BIOS ROM Configuration Table address in ES:BX */
+ setES(HIWORD(Bct));
+ setBX(LOWORD(Bct));
+
+ /* Call successful; clear CF */
+ setAH(0x00);
Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
break;
@@ -336,25 +350,22 @@
((PULONG)BaseAddress)[0x49] = (ULONG)NULL;
}
-/* PUBLIC FUNCTIONS ***********************************************************/
-
-/*
- * The BIOS POST (Power On-Self Test)
- */
-BOOLEAN Bios32Initialize(VOID)
-{
- BOOLEAN Success;
+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;
+}
+
+static VOID InitializeBiosData(VOID)
+{
UCHAR Low, High;
-
- /* Initialize the stack */
- // That's what says IBM... (stack at 30:00FF going downwards)
- // setSS(0x0000);
- // setSP(0x0400);
- setSS(0x0050); // Stack at 50:0400, going downwards
- setSP(0x0400);
-
- /* Set data segment */
- setDS(BDA_SEGMENT);
/* Initialize the BDA contents */
Bda->EquipmentList = BIOS_EQUIPMENT_LIST;
@@ -368,6 +379,30 @@
IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_BASE_MEMORY_HIGH);
High = IOReadB(CMOS_DATA_PORT);
Bda->MemorySize = MAKEWORD(Low, High);
+}
+
+/* PUBLIC FUNCTIONS ***********************************************************/
+
+/*
+ * The BIOS POST (Power On-Self Test)
+ */
+BOOLEAN Bios32Initialize(VOID)
+{
+ BOOLEAN Success;
+
+ /* Initialize the stack */
+ // That's what says IBM... (stack at 30:00FF going downwards)
+ // setSS(0x0000);
+ // setSP(0x0400);
+ setSS(0x0050); // Stack at 50:0400, going downwards
+ setSP(0x0400);
+
+ /* Set data segment */
+ setDS(BDA_SEGMENT);
+
+ /* Initialize the BDA and the BIOS ROM Information */
+ InitializeBiosData();
+ InitializeBiosInfo();
/* Register the BIOS 32-bit Interrupts */
InitializeBiosInt32();
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