bool CALLBACK_Setup(Bitu callback,CallBack_Handler handler,Bitu type,const char* descr) {
if (callback>=CB_MAX) return false;
CALLBACK_SetupExtra(callback,type,CALLBACK_PhysPointer(callback)+0,(handler!=NULL));
CallBack_Handlers[callback]=handler;
CALLBACK_SetDescription(callback,descr);
return true;
}
Bitu CALLBACK_Setup(Bitu callback,CallBack_Handler handler,Bitu type,PhysPt addr,const char* descr) {
if (callback>=CB_MAX) return 0;
Bitu csize=CALLBACK_SetupExtra(callback,type,addr,(handler!=NULL));
if (csize>0) {
CallBack_Handlers[callback]=handler;
CALLBACK_SetDescription(callback,descr);
}
return csize;
}
void BIOS_Init()
{
Mem_rStosb(0x400, 0, 0x200); // Clear the Bios Data Area (0x400-0x5ff, 0x600- is accounted to DOS)
// Setup all the interrupt handlers the Bios controls
CALLBACK_SetupExtra(0, CB_IRQ0, dWord2Ptr(BIOS_DEFAULT_IRQ0_LOCATION));
RealSetVec(0x08, BIOS_DEFAULT_IRQ0_LOCATION);
BIOS_HostTimeSync(); // Initialize the timer ticks
CALLBACK_Install(0x11, &INT11_Handler, CB_IRET); // INT 11 Get equipment list
CALLBACK_Install(0x12, &INT12_Handler, CB_IRET); // INT 12 Memory size default at 640 kb
Mem_Stosw(BIOS_MEMORY_SIZE, 640);
CALLBACK_Install(0x13, &INT13_DiskHandler, CB_IRET_STI); // INT 13 BIOS Disk support
Mem_Stosb(BIOS_HARDDISK_COUNT, 2); // Setup the Bios Area
CALLBACK_Install(0x14, &INT14_Handler, CB_IRET_STI); // INT 14 Serial ports
CALLBACK_Install(0x15, &INT15_Handler, CB_IRET_STI); // INT 15 Misc calls
BIOS_SetupKeyboard(); // INT 16 Keyboard handled in another file
CALLBACK_Install(0x17, &INT17_Handler, CB_IRET_STI); // INT 17 Printer Routines
CALLBACK_Install(0x1a, &INT1A_Handler, CB_IRET_STI); // INT 1A Time and some other functions
// These are already setup as dummy by CALLBACK_Init()
// CALLBACK_SetupDummyIRET(0x1c); // INT 1C System timer tick called from INT 8
// CALLBACK_Install(0x71, NULL, CB_IRQ9); // Irq 9 rerouted to irq 2
// CALLBACK_SetupDummyIRET(0x18); // Reboot dummies
// CALLBACK_SetupDummyIRET(0x19);
// set system BIOS entry point too
Mem_aStosb(0xffff0, 0xEA); // FAR JMP
Mem_aStosd(0xffff1, Mem_Lodsd(0x18*4));
Bitu cbID = CALLBACK_Allocate(); // Irq 2
CALLBACK_Setup(cbID, NULL, CB_IRET_EOI_PIC1, dWord2Ptr(BIOS_DEFAULT_IRQ2_LOCATION));
RealSetVec(0x0a, BIOS_DEFAULT_IRQ2_LOCATION);
Mem_aStosb(BIOS_DEFAULT_HANDLER_LOCATION, 0xcf); // BIOS default interrupt vector location -> IRET
Mem_aWrites(0xfff00, "vDos BIOS", 9); // System BIOS identification
Mem_aWrites(0xffff5, "01/01/99\x00\xfc\x24", 11); // System BIOS date + signature
for (Bitu i = BIOS_COM1_TIMEOUT; i <= BIOS_COM4_TIMEOUT; i++) // Port timeouts
Mem_Stosb(i, 1);
}
