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Re: College Slam - Does not detect cd

The disc label is checked with a call to INT 21h/4Eh CX=8, resulting in a "no more files" error with an image mount. Even though the label is blank (spaces) there should not be an error. A blank label is returned with no error when the same image is mounted in Daemon Tools and that drive MOUNTed in …

Re: Hi-Octane + General MIDI = crash?

in DOS
There is a bug in the main executable causing it to react badly to the relatively small size of the MPU401.MDI driver. A low-tech fix is to pad the driver with zero bytes so it's as large as the other MIDI drivers. I've attached an archive with the padded driver for convenience; it avoids the bug …

Re: Bumble Games (1983) - locks dosbox up

That means the .BAS file being loaded into the interpreter has a line that is too long. I suspect the file is either corrupt or has been modified from its original form, possibly to convert it to other BASIC dialects (e.g. QBasic). Check the date stamps on the .BAS and make sure they all have a 1983 …

Re: TV Sports Football - freeze on gameplay

This game actually has a few known issues. The hang is caused by a game bug that reads the interrupt table from a null pointer, and is avoided on real systems because of how the interrupt table is typically arranged. A workaround program is attached for the issue. There are some graphics that appear …

Re: Christoph Kolumbus

Would probably be more relevant to report results with DOS-era video hardware. The legacy support in modern video cards can be... spotty. The problem does not occur in DOSBox when loading an S3, Tseng, Western Digital, Trident, or IBM VGA BIOS. I put in logging to confirm that palette indexes 0xf8 …

Re: SVN Directory handling

The change was made to fix the "Dactylus" installer, but it is only necessary at the function level. In MS-DOS the trailing backslash behavior is applied to both the command line and the function call, but DOSBox could depart from the compatible behavior at the shell level if no game is known to …

Re: SVN Directory handling

If a trailing backslash on the path when changing the default directory is the issue (the thread starter did not mention that or use it in an example) then the behavior was intentionally changed to be more compatible. In MS-DOS 5/6 the rule is: a trailing backslash is only valid if the path resolves …

Re: SVN Directory handling

I created a three-level folder structure. If I type "cd .\folder\folder" from C:\ my default becomes C:\FOLDER\FOLDER, and if type the same command from C:\FOLDER my default becomes C:\FOLDER\FOLDER\FOLDER. So, I'm not seeing any problem here with current SVN source. Please, whenever possible ( …

Re: Christoph Kolumbus

The game relies on a behavior of real video BIOSes where the upper 8 entries of the VGA palette are not initialized when setting mode 13h. It uses the upper entries for font and mouse pointer colors, and the DOSBox internal video BIOS sets them to black when mode 13h is set. case M_VGA: case M_LIN8: …

Re: International Sports Challenge Sound

I don't think you should delete START.DAT, the setup options are in the SETUP.DAT file. SETUP.EXE doesn't look at SETUP.DAT, it always defaults to speaker. Change the sound option by pressing space on it and then on "Done". If you look at what is written in SETUP.DAT, no distinction is made between …

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