On further checking, I noticed that is was reading from port 0020h, but it never writes in a OCW3. After searching through several resources, including Ralph Brown's Int list, this appears to be an undefined behavior.

hmmm it looks like masking and unmaking of an irq. It hangs in this part ? Yes, it quits with "PIC:Unhandled command 0x80"

I found out why it wasn't working. 7CoG uses a direct method of resetting the keyboard at the port level. The method, which is actually shown in my Asm book, 7CoG uses is: in al,20h ; read current value of port 20h or al, 80h ; set 7th bit to 1 jmp $+2 ; delay out 20h, al ; send value with 7th bit …

It calls EmptyCache so it should, but CD mounts already can tell if they are changed. And as for floppies, RESCAN can't be used when an install program in running.

Tried installing X-wing, but couldn't get it to see disk 2. Turns out that it was a simple behavior issue with getting the volume name. When a label isn't found, it should return an error, not "". Adding the following code fixes X-wing installer. In the file "drive_local.cpp" In the function " …

UPDATE - Another installer based bug found in post #2 If using an actual floppy to install multi-disk game(In my case "Tie Fighter"), it can't find the 2nd disk because the search cache is still reporting the 1st disk. I know no way of quickly checking if the media changed, so the solution would be …

Ok, with IOTCL I have a solution: In cdrom_iotcl_win32.cpp line 78ish: attr = (toc.TrackData[track-1].Adr << 4) | toc.TrackData[track].Control; should be attr = (toc.TrackData[track-1].Control << 4) & 0xEF; Why? Adr only specifies the type of data read in and is defined. ADR Code Description 0h Q …

Yes! I got it to work. Firstly, WoZ definitely requries the 0x40 bit to set to indicate "data track". Second, it has to be able to read the copyright name. SDL fails because ReadSectors() isn't implemented(always returns false). To bypass, I used -Ioctl, and also had to hack the bit for "data track" …

*Win32 build* UPDATE and summary - Found the ioctl bug, and provided solution in 3rd post. - No solution to SDL found, since SDL doesn't have API for CD data reading, which is required to bypass protection. END UPDATE Well I wanted to play Might and Magic: World of Xeen(from RPG collections set), …