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Re: Dumping and Emulation Issue

Posted: Wed Feb 17, 2021 12:27 am
by plaxamate
Got 86Box to work. I had to convert the psi to td0. Once I did that, I created my PCJr machine properly and started it up. It seems to work perfectly. For those that haven't checked it out, it's pretty cool. I was used to the C64 version.

Re: Dumping and Emulation Issue

Posted: Thu Feb 18, 2021 11:25 am
by Jeff_HxC2001
ScreenShotTrack39.jpg
ZrX wrote: Mon Feb 15, 2021 7:37 pm That's just because the sector header has been altered to tell you the sector is 1024 bytes while the actual sector itself is still just 512 bytes. HxC tries to interpret it according to the header information and makes it look like the next sector is inside it, which also causes the checksum to come out as bad.

Too much automation in a software isn't always a good thing.
But this is just how a normal floppy controller read this. This sector is bad from a CRC point of view. The protection routine expect to find the next sector header in the "bad" sector data. The graphical representation is right.

Re: Dumping and Emulation Issue

Posted: Mon Feb 22, 2021 11:08 am
by ZrX
Matter of perspective. How the disk is built vs how the controller sees the disk.

Re: Dumping and Emulation Issue

Posted: Sun Mar 07, 2021 3:32 am
by rcade
plaxamate wrote: Tue Feb 16, 2021 12:51 am Very interesting! I know that there is a broken copy out there that works on DosBox, so I wasn't sure about mine.

According to this site (https://www.vogons.org/viewtopic.php?t=50664&start=40) the disk won't work at all on any CGA/EGA, etc. past the title (which is what happens on my dump), so maybe it's a good dump and I just have to wait for an emulator to come out since I can't write code. I'm curious, though, since my disk DOES have a notch in it (which I wasn't expecting). Anyone got a PCJr to check it? :-)
I do, but image is deleted now.

Re: Dumping and Emulation Issue

Posted: Sun Mar 07, 2021 6:07 pm
by brightcaster
Here we go:

https://davidkrause.de/GhostbusterPCjr.zip

I also deleted this file (as I do with all the dumps presented here after a short while), but I still had it in my second last backup....


David

Re: Dumping and Emulation Issue

Posted: Sun Mar 07, 2021 6:41 pm
by plaxamate
David beat me to it. I tend to remove the dumps from Dropbox after a time. Please let us know if it works on a real machine!