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Cloning the ROMs ?

Posted: Thu Aug 03, 2017 2:48 pm
by ViperSan
I have been busy refurbishing a couple of VIC pcbs recently ..and am down to my last 2 x UE12 901486-07 chips ROMs ..
In light of their scarcity ..Im wondering if I can clone such chips to Eprom..?
I have a UV Eraser and some random Eprom chips.
My question is ..
If this is possible ..
what programmer will recognise the roms (what device is the original rom ?) and copy the data to bin files ..
plus which eprom is a suitable replacement ?
any advice on this topic would be appreciated..
I presume the Char roms and Basic rom would also be posible using the same method..
???
rgds
VS

Re: Cloning the ROMs ?

Posted: Thu Aug 03, 2017 3:38 pm
by MCes

Re: Cloning the ROMs ?

Posted: Thu Aug 03, 2017 4:41 pm
by ViperSan
Already had a programmed AM27C256 ..on a plug in header I made many years ago ...
took a chance the contents were indeed 901486-07 ...
Indeed they were ..so scraped clean a second AMBIOS 27C256 I had in the bits box ..and subjected it to the UV eraser strobe gun ..
All clean FFs ..
Popped it in tmy TL866 MiniPro ..and cloned the chip ..
I now have 2 ....
That was easy because I already had a dump of the Kernal ...
but how do I read ...the other Proms ..eg ..the Charset rom ?
I used to have a more advanced programmer back then ..
I wonder if the TL866 can read VIC proms ????

Re: Cloning the ROMs ?

Posted: Thu Aug 03, 2017 5:07 pm
by ViperSan
So ..I guess my problem now is how to dump the contents of a 2364 MOS rom ...?
Is there a modern USB type programmer/device with zif socket that can do this ?
If so ..please advise me ?
rgds
VS

Re: Cloning the ROMs ?

Posted: Thu Aug 03, 2017 6:02 pm
by norm8332

Re: Cloning the ROMs ?

Posted: Thu Aug 03, 2017 6:21 pm
by ViperSan
Thanks for the links Norm ..
very useful indeed ..though I do feel Im cheating a little by not doing the job myself..lol
Then again ..why try and re-invent the wheel ?
:D

Re: Cloning the ROMs ?

Posted: Fri Aug 04, 2017 4:54 pm
by eslapion
ViperSan wrote:I wonder if the TL866 can read VIC proms ????
The pinout of the 2364 ROMs used in the VIC-20, 1541, C64 and all Commodore made VIC-20 cartridges is directly compatible with MCM68764 and MCM68766 EPROMs.

I have a BK Precision 866B with can read the old ROMs as well as program the above EPROMs. Unfortunately, I never had the privilege of dumping ROMs which had not previously been archived by someone else. I think the only ROM I provided to Zimmer's which was not already there is the BASIC V4 for the VIC-20 which I had sitting for more than 20 years on a floppy disk that was given to me in the late 80s.