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Re: PCE Compatibility Cartridge
Posted: Wed Oct 06, 2021 12:15 pm
by robdaemon
jscrow wrote: ↑Sat Sep 18, 2021 11:54 am
Ok I was able to combine the files to one ROM image and it works! I tried the files in different orders and it seem to work about the same no matter which order the files are arranged.
Oooh, my raphnetlabs cart PCB comes in today. Was there anything special you did, or was it just a binary concatenation of all the files together?
(and I'm guessing specific jumper settings on the PCB too)?
Re: PCE Compatibility Cartridge
Posted: Wed Oct 06, 2021 7:15 pm
by Lumpy
Remove the PCJRCART header from each of the files and copy and paste two of these files to the end of first file. Burn the combined file to an EPROM or EEPROM. I haven't tried different jumper settings although I suspect others will work but the one I used was D0000-D7FFF.
Re: PCE Compatibility Cartridge
Posted: Sat Oct 09, 2021 11:26 am
by robdaemon
Lumpy wrote: ↑Wed Oct 06, 2021 7:15 pm
Remove the PCJRCART header from each of the files and copy and paste two of these files to the end of first file. Burn the combined file to an EPROM or EEPROM. I haven't tried different jumper settings although I suspect others will work but the one I used was D0000-D7FFF.
Great, thanks. I think I did something wrong in my first pass, the PCjr doesn't do anything with the cart in. If I swap the EPROM for the pure compatibility cart ROM posted here, that works. Unfortunately I'm using 27C256R chips so I can't erase / reprogram the bad one. Oops.
I stripped the headers off three of the five files (I figured I didn't need the jrIDE or Racore images):
note to anyone reading this - this did NOT net me a working ROM image, don't try exactly this at home!
Code: Select all
tail -c +128 D800.BIN > D800.BIN.trunc
tail -c +128 DA00.BIN > DA00.BIN.trunc
tail -c +128 DE00.BIN > DE00.BIN.trunc
cat D800.BIN.trunc DA00.BIN.trunc DE00.BIN.trunc >> combo-cart.bin
Leaving me with a 24,579 byte combo-cart.bin file.
Re: PCE Compatibility Cartridge
Posted: Wed Nov 24, 2021 8:30 pm
by jboard146
I was able to combine 3 of the file on to one EERPOM AT28C256 using HXD.
D800.BIN (Compatibility Cart 1.5)
DA00.BIN (jr Video)
DE00.BIN (jr Synchro Enhanced KB)
The names above are just what I'm getting out of of the headers.
The only way I could get it to boot was I had to set the cartage for CS5 (E8000-EFFFF).
I've got a jrIDE so that BIOS is also loading.