Hi! Does anyone have a good recommendation for which EPROM chip to use? Most of what has been referenced here is no longer available - specifically refer to IW78C21M1 / 29F800. Thanks!

psmith048 wrote on 2026-01-05, 00:38:

Hi! Does anyone have a good recommendation for which EPROM chip to use? Most of what has been referenced here is no longer available - specifically refer to IW78C21M1 / 29F800. Thanks!

I used AM29F800BB-70, see Re: ARGUS Project thread - Now with gerbers and documentation in initial post!

florian3 wrote on 2026-01-05, 00:51:

psmith048 wrote on 2026-01-05, 00:38:

Hi! Does anyone have a good recommendation for which EPROM chip to use? Most of what has been referenced here is no longer available - specifically refer to IW78C21M1 / 29F800. Thanks!

I used AM29F800BB-70, see Re: ARGUS Project thread - Now with gerbers and documentation in initial post!

Thank you for quick reply. Do you recall what variant of the AM29F800BB-70 it was? I searched around and looks like I can get AM29F800BB-70SC and not EC. Also, if going with this chip, does it then not require the modification in the post you linked? Thanks!

According to my old ebay order it was AM29F800BB-70SC. It worked without modifications.

Thank you! Appreciate the help!