EPROM?

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thearttrooper
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EPROM?

Post by thearttrooper » Sun Nov 10, 2019 9:32 pm

I've bought myself a TL866II Plus EPROM programmer and would like give it a go. I need some EPROMs. I have a Master 128 with a cartridge case with a space slot for a ROM. What kind of EPROM should I get?

Thanks for your help.



Chris.

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danielj
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Re: EPROM?

Post by danielj » Sun Nov 10, 2019 11:26 pm

27C128 or 27C256 (although you can only use half of the latter, but that's fine as it's 16K) - or you can use EEPROMs, e.g. 28C256 etc... EEPROMs are easier to erase as you don't need UV :)

d.

thearttrooper
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Re: EPROM?

Post by thearttrooper » Wed Nov 13, 2019 9:11 pm

Thanks. I think I miss-typed EPROM when I meant EEPROM. Takes me back to "borrowing" Basic and other ROMs from school beebs and having blowing a copy with some cool big HP kit that a friend of the family had.


Chris.

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1024MAK
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Re: EPROM?

Post by 1024MAK » Wed Nov 13, 2019 11:11 pm

Depends on if you will actually want to erase them. If not, one time programmable EPROMs are slightly cheaper (that’s what BeebMaster uses).

Mark

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BeebMaster
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Re: EPROM?

Post by BeebMaster » Thu Nov 14, 2019 12:24 am

Sssshhhh that's a secret! Actually, I am running short of them after all these years! So the batch of 8271 disc kits (if Texas Instruments actually eventually trouble themselves to fish out the blueprint for the 74LS393 and make some) might have some ceramic 27C256 with a window and everything!
Image

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