Dumping character ROM

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Jo Even
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Posts: 88
Joined: Wed Jan 17, 2018 9:28 pm

Dumping character ROM

Post by Jo Even » Sun Aug 18, 2019 10:46 am

I have an MZ-700 with a Swedish character ROM I want to dump. The ROM is a Mitsubishi M5L2732K, for which my EPROM programming software (MiniPro) does not have a profile for. I have tried to dump it with some other 2732 DIP24 profiles, and while it seems to work the bit-order appears to be reversed when I test it in an emulator.
MZ700 reversed characters.png
MZ700 reversed characters.png (15.83 KiB) Viewed 69 times
This is a DOS emulator called MZ700EMU. Any idea if this is a problem with the dumped ROM or the emulator?
Attachments
MZ700-swe-char-rom.zip
(2.82 KiB) Downloaded 5 times

Jo Even
Site Admin
Posts: 88
Joined: Wed Jan 17, 2018 9:28 pm

Re: Dumping character ROM

Post by Jo Even » Sun Aug 18, 2019 11:04 am

Ok, it seems to be an emulator "feature".

https://www.sharpmz.no/articles/the-mz- ... ators-rom/
Some authors have mirrored the bit combination in each column of the characters.

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