173 lines
3.4 KiB
C
173 lines
3.4 KiB
C
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#include "enduser.h"
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VOID
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UpdateMasterDiskState(
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IN HDISK DiskHandle,
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IN UINT NewState
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)
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{
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MasterDiskInfo.State = NewState;
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memset(IoBuffer,0,512);
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memcpy(IoBuffer,&MasterDiskInfo,sizeof(MASTER_DISK));
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if(!WriteDisk(DiskHandle,1,1,IoBuffer)) {
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FatalError(textWriteFailedAtSector,1,1L);
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}
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}
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UINT
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LocateMasterDisk(
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IN UINT UserSpecifiedInt13Unit OPTIONAL
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)
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{
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UINT DiskCount;
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UINT i;
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BYTE Int13Unit;
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BYTE spt;
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USHORT h,cyl;
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ULONG ext;
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BYTE UnitToMatch;
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UnitToMatch = (BYTE)(UserSpecifiedInt13Unit ? UserSpecifiedInt13Unit : 0x80);
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DiskCount = InitializeDiskList();
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for(i=0; i<DiskCount; i++) {
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if(IsMasterDisk(i,IoBuffer)) {
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//
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// Want unit 80h
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//
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if(GetDiskInfoById(i,0,&Int13Unit,&spt,&h,&cyl,&ext)
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&& (Int13Unit == UnitToMatch)) {
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return(i);
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}
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}
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}
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FatalError(textCantFindMasterDisk);
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}
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VOID
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FatalError(
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IN FPCHAR FormatString,
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...
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)
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{
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char strng[250];
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va_list arglist;
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unsigned p;
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DispClearClientArea(NULL);
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DispPositionCursor(TEXT_LEFT_MARGIN,TEXT_TOP_LINE);
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DispSetCurrentPixelValue(VGAPIX_LIGHT_YELLOW);
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DispWriteString(textFatalError1);
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DispWriteString("\n\n");
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DispWriteString(textFatalError2);
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DispSetCurrentPixelValue(VGAPIX_LIGHT_RED);
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va_start(arglist,FormatString);
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vsprintf(strng,FormatString,arglist);
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va_end(arglist);
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DispWriteString("\n\n");
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DispWriteString(strng);
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//
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// Hanging this way prevents control-c because DOS isn't involved.
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//
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// We allow a special way to get out of this screen and exit
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// the program, for testing.
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//
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strcpy(strng,"I am TEDM");
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p = (unsigned)strng;
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_asm {
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y:
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mov si,p
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x:
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push si
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xor ax,ax ; get keystroke
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int 16h
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pop si
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push ss
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pop ds
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cmp byte ptr [si],0 ; reached and of match string?
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jnz not0 ; no, try to match chars
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cmp al,ASCI_CR ; see if user hit ENTER
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je bustout ; user entered magic code, exit to DOS
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jne y ; start all over
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not0:
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cmp [si],al ; still on target for magic sequence?
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jne y ; no, start over
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inc si ; yes, set up for next iteration
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jmp short x
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bustout:
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mov ax,3
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int 10h
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}
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exit(0);
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}
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USHORT
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GetKey(
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VOID
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)
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{
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USHORT c;
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_asm {
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mov ah,0
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int 16h
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mov c,ax
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}
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switch(c) {
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case 0x5000:
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return(DN_KEY_DOWN);
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case 0x4800:
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return(DN_KEY_UP);
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case 0x4200:
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return(DN_KEY_F8);
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default:
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return(c & 0x00ff);
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}
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}
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VOID
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DrainKeyboard(
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VOID
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)
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{
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_asm {
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drain:
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mov ah,1 ; get keyboard status
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int 16h ; zero flag set = no key waiting
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jz drained ; no key waiting, we're done
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mov ah,0 ; get keypress, we know one is there
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int 16h
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jmp short drain ; see if there are more keys waiting
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drained:
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}
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}
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