1 files changed, 123 insertions, 0 deletions
diff --git a/private/mvdm/v86/scaffold/i386/fakeinit.c b/private/mvdm/v86/scaffold/i386/fakeinit.c
new file mode 100644
index 000000000..ae5d586de
--- /dev/null
+++ b/private/mvdm/v86/scaffold/i386/fakeinit.c
@@ -0,0 +1,123 @@
+//
+// Fake Bios support initialization.
+//
+// This file provides interrim support for rom bios services initialization.
+// It is only intended for use until Insignia produces proper rom support
+// for NTVDM
+//
+
+#include <windows.h>
+#include <stdio.h>
+#include <conio.h>
+#include <string.h>
+#include "softpc.h"
+#include "bop.h"
+#include "xguest.h"
+#include "xbios.h"
+#include "xbiosdsk.h"
+#include "fun.h"
+
+#define SERVICE_LENGTH 4
+static BYTE ServiceRoutine[] = { 0xC4 , 0xC4, BOP_UNIMPINT, 0xCF };
+
+#define RESET_LENGTH 16
+static BYTE ResetRoutine[] = { 0xEA, 0x00, 0x00, 0x00, 0xE0, // jmpf E000:0
+                               BIOSDATE_MINE,
+                               0, 0xFE, 0 };
+
+static BYTE WarmBoot[] = {
+    OPX_MOVAX,      BYTESOFFSET(0x30),
+    OPX_MOV2SEG,    MODREGRM(MOD_REGISTER,REG_SS,REG_AX),
+    OPX_MOVSP,      BYTESOFFSET(0x100),
+    OPX_MOVAX,      0x00, 0x00,
+    OPX_MOV2SEG,    MODREGRM(MOD_REGISTER,REG_DS,REG_AX),
+    OPX_MOV2SEG,    MODREGRM(MOD_REGISTER,REG_ES,REG_AX),
+    OPX_MOVDX,      DRIVE_FD0, 0x00,    // WARNING: sync with BIOSBOOT_DRIVE
+    OPX_MOVCX,      0x01, 0x00,
+    OPX_MOVBX,      BYTESOFFSET(BIOSDATA_BOOT),
+    OPX_MOVAX,      0x01, DSKFUNC_READSECTORS,
+    OPX_INT,        BIOSINT_DSK,
+    OPX_JB,         -7,
+    OPX_JMPF,       BYTESCOMPOSITE(0, BIOSDATA_BOOT)
+};
+#define WARMBOOT_LENGTH sizeof(WarmBoot)
+
+static BYTE EquipmentRoutine[] = {   // INT 11h code
+    OPX_PUSHDS,
+    OPX_MOVAX,      0x00, 0x00,
+    OPX_MOV2SEG,    MODREGRM(MOD_REGISTER,REG_DS,REG_AX),
+    OPX_MOVAXOFF,   BYTESOFFSET(BIOSDATA_EQUIP_FLAG),
+    OPX_POPDS,
+    OPX_IRET
+};
+#define EQUIPMENT_LENGTH sizeof(EquipmentRoutine)
+
+static BYTE MemoryRoutine[] = {      // INT 12h code
+    OPX_PUSHDS,
+    OPX_MOVAX,      0x00, 0x00,
+    OPX_MOV2SEG,    MODREGRM(MOD_REGISTER,REG_DS,REG_AX),
+    OPX_MOVAXOFF,   BYTESOFFSET(BIOSDATA_MEMORY_SIZE),
+    OPX_POPDS,
+    OPX_IRET
+};
+#define MEMORY_LENGTH sizeof(MemoryRoutine)
+
+
+VOID BiosInit(int argc, char *argv[]) {
+
+    PVOID Address, RomAddress;
+
+    // set up IVT with unimplemented interrupt handler
+
+    for (Address = NULL; Address < (PVOID)(0x1D * 4); (PCHAR)Address += 4) {
+        *(PWORD)Address = 0x100;
+        *(((PWORD)Address) + 1) = 0xF000;
+    }
+
+    RomAddress = (PVOID)(0xE000 << 4);
+
+    // set up warm boot handler
+    memcpy(RomAddress, WarmBoot, WARMBOOT_LENGTH);
+    Address = RMSEGOFFTOLIN(0, BIOSINT_WBOOT * 4);
+    *((PWORD)Address) = 0;
+    *((PWORD)Address + 1) = 0xE000;
+    (PCHAR)RomAddress += WARMBOOT_LENGTH;
+
+    // set up equipment interrupt handler
+    memcpy(RomAddress, EquipmentRoutine, EQUIPMENT_LENGTH);
+    Address = RMSEGOFFTOLIN(0, BIOSINT_EQUIP * 4);
+    *((PWORD)Address) = RMOFF(RomAddress);
+    *((PWORD)Address + 1) = RMSEG(RomAddress);
+    (PCHAR)RomAddress += EQUIPMENT_LENGTH;
+
+    // set up memory size interrupt handler
+    memcpy(RomAddress, MemoryRoutine, MEMORY_LENGTH);
+    Address = RMSEGOFFTOLIN(0, BIOSINT_MEMORY * 4);
+    *((PWORD)Address) = RMOFF(RomAddress);
+    *((PWORD)Address + 1) = RMSEG(RomAddress);
+ 
+    RomAddress = (PVOID)((0xF000 << 4) + 0x100);
+
+    Address = (PBYTE)RomAddress + 0xFE53;
+    *(PCHAR)Address = 0xCF;         // IRET at f000:ff53
+
+    // set up unimplemented interrupt handler
+
+    memcpy(RomAddress, ServiceRoutine, SERVICE_LENGTH);
+    (PCHAR)RomAddress += SERVICE_LENGTH;
+
+    // set up reset code
+    memcpy(RMSEGOFFTOLIN(BIOSROM_SEG, BIOSROM_RESET), ResetRoutine, RESET_LENGTH);
+
+    // set up equipment byte and memory size
+
+    *(PWORD)RMSEGOFFTOLIN(BIOSDATA_SEG, BIOSDATA_EQUIP_FLAG) = 
+        BIOSEQUIP_32KPLANAR;
+    *(PWORD)RMSEGOFFTOLIN(BIOSDATA_SEG, BIOSDATA_MEMORY_SIZE) = 
+        640;
+    
+    // Initialize individual rom modules
+
+    BiosKbdInit(argc, argv, &RomAddress);
+    BiosVidInit(argc, argv, &RomAddress);
+}