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Post by soviet on Jan 25, 2015 0:26:45 GMT
Hi i got a 128 swedish commodore 128 have a missing charrom socket, i need to know how to install a eprom in place of the charrom.
I have an eprom programer and new 27c256 eproms ready for the task but i can't find a guide to do the install.
Thanks!.
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Post by hydrophilic on Jan 27, 2015 7:01:29 GMT
Well, U18 is an 8K ROM. It holds two character sets.
On US(UK?) machines, it holds two similar but different "fat" character sets (one for C64-mode, and another for C128 [similar to Plus/4]).
On international machines, it holds two quite different character sets. First is a C64 compatible "fat" [default for C128], and second is a "thin/country" font [must press ASCII/DEN key].
The 8K ROM must contain 2 separate fonts. The first is for C64 (or C128 "classic"), while the second is for C128 (standard or "thin")
I am so, so, so SORRY if that is confusing... I am perfectly able to clarify that junk, but you would have to tell me if you are using US machine or some other 128 (please specify NTSC/PAL or country).
Err, in conclusion, you need an 8K (compatible) chip to stuff into the U18 socket... |
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Post by soviet on Jan 27, 2015 15:32:20 GMT
Thank for the information, so i have to get some 8k eproms, and build a eprom to rom adapter.
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