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Author Topic: Dumping Rom on i8502?  (Read 562 times)

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Offline jpyeronTopic starter

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Dumping Rom on i8502?
« on: May 20, 2023, 08:25:48 pm »
If I am reading the 1988 data sheet correctly, the reading protection is only on the eprom variants. Anyone else have experience before I solder the only working chip I have?

Goal: patch firmware (new chip) and replace.
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Offline PCB.Wiz

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Re: Dumping Rom on i8502?
« Reply #1 on: May 21, 2023, 04:25:55 am »
If you meant i8052, google finds this
https://phk.freebsd.dk/hacks/reading_i8052/
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Offline jpyeronTopic starter

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Re: Dumping Rom on i8502?
« Reply #2 on: May 21, 2023, 04:24:52 pm »
yes, I read that too, the data sheet was ordered and worded in a way to introduce doubt.
Quote from: PCB.Wiz on May 21, 2023, 04:25:55 am
https://phk.freebsd.dk/hacks/reading_i8052/

There are other sites that indicate later versions "added protections" and "may not follow the datasheet".

I thought it was worth a second opinion.
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