Dumping character ROM

Jo Even
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Dumping character ROM

Post by Jo Even »

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 4740 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 140 times
Jo Even
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Posts: 145
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Re: Dumping character ROM

Post by Jo Even »

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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Pacman
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Joined: Mon Feb 05, 2018 2:59 pm

Re: Dumping character ROM

Post by Pacman »

Hello,

By analyzing Swedish characters, I realized that there were duplicate characters (pink color) and poorly copied characters (in red) compared to Western originals (attached image).
Did I analyze the file incorrectly?
jeu_suede.png
jeu_suede.png (18.69 KiB) Viewed 4590 times
hlide
Posts: 508
Joined: Thu Jan 25, 2018 9:31 pm

Re: Dumping character ROM

Post by hlide »

I'm not sure the Swedish font was an official one and was fully qualified. It is probably a third-party selling MZ-700 with a Swedish keyboard and a monitor rom and a font rom they altered.
hlide
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Re: Dumping character ROM

Post by hlide »

Jo Even wrote: 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.
Are they Japanese? could be a trick to not publish the original font file as such...
S_U_C
Posts: 38
Joined: Sun Feb 17, 2019 6:41 pm

Re: Dumping character ROM

Post by S_U_C »

Hi this may help
Attachments
Mitsubishi M5L2732K.zip
(157.28 KiB) Downloaded 107 times
UncleBod
Posts: 22
Joined: Tue Sep 18, 2018 1:26 pm

Re: Dumping character ROM

Post by UncleBod »

The Swedish original font ROM was definitely official in the 700. It was installed by ADDO Sharp, the Swedish distributor. This could, of cause, be a non official ROM anyway. How was it labeled?
/UncleBod
Last edited by UncleBod on Fri Oct 25, 2019 6:23 am, edited 1 time in total.
hlide
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Re: Dumping character ROM

Post by hlide »

UncleBod
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Re: Dumping character ROM

Post by UncleBod »

I am more interested in the label on the prom. Besides, the MZ-800 were slightly late on the market, and I am not sure if they went through the ADDO Sharp office or any other way.
/UncleBod
Jo Even
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Re: Dumping character ROM

Post by Jo Even »

Pacman wrote: Thu Oct 24, 2019 9:45 am By analyzing Swedish characters, I realized that there were duplicate characters (pink color) and poorly copied characters (in red) compared to Western originals (attached image).
The duplicate characters are there to avoid patching software. Take a look at my Swedish keyboard and you'll see what I mean :)
2019-11-04 21.00.30.jpg
2019-11-04 21.00.30.jpg (168.41 KiB) Viewed 4450 times
The downside is of course that programming on this machine is a b*tch.
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