8051 vs. 68K

[Peter Ullrich]

At 10:50 26.11.1996 +0300, Gimle / sYmptom , Toni Aittoniemi wrote:
>> You can sometimes find surplus 8051s at very reasonable prices (since 
>> they already have code burned into them - thanks Barry :-). But the 
>> part has a pin that you yank low to disable onboard PROM and select 
>> external EEee(whatever)PROM instead, so they're great for the diy-er. 
>
>Well, 8031's don't have internal ROM at all, (you always have to ground
>EA) and they cost something like $6

But normally the 8031 are 8051 with old or wrong code in the ROM so that the
manufacturer marks and sells them as 8031. Read the 8031 code memory with
your programmer - it is really interesting to get into strange code parts...
I got different Tiny basic version, cardgames, wheater stations,...

Peter


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