kodak80 blog

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kodak80
Posts: 261
Joined: Sat Oct 21, 2017 1:14 am
Location: Brisbane,QLD Australia
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Re: kodak80 blog

Post by kodak80 » Mon Jul 06, 2020 1:18 pm

I had a stash of Fujitsu MBM27C1000A 1mbit UV EPROMs I purchased a while ago and found that my TL866II programmer did not have listed. Rather than throw them away as no one wanted to buy them from me, I held onto them.

I decided that I wanted to try using these in my STE instead of the usual 27C010 chips so that I would not need to change the W102, W103 and W104 jumpers when they were set for 28 pin TOS ROMs.

I have therefore created an adapter board that maps the 27C1000 to 27C010 which has allowed me to then program them as 27C010 in my programmer.
27C1000_to_27C010_Adapter_Board.jpg
27C1000_to_27C010_Adapter_Board.jpg (289.83 KiB) Viewed 219 times
I made up one of the PCBs and it worked. 2 x 27C1000 chips programmed with TOS 2.06 (HI/LO) and inserted into one of my STEs which previously had v1.62 28 pin mask ROMs. I have also loaded EmuTOS 0.9.12 into a couple of the 27C1000 chips and this also works fine in the STE.
27C1000_STE.jpg
27C1000_STE.jpg (420.26 KiB) Viewed 219 times
27C1000_STE_Jumpers.png
27C1000_STE_Jumpers.png (4.9 KiB) Viewed 219 times
Atari Falcon 030 | Atari 1040 STE | Atari 1040 STFM | Atari 1040 STF | Kryoflux & Supercard Pro Flux boards
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review

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