Re: [M100] 27C256 pin 1 VPP - can it float?

Yes, but then again, the rom image is archived and distributed and downloadable, and it's very easy to just re-program the chip if it ever did get corrupted. The harm would just be spinning your wheels looking for some other kind of hardware fault that day if it ever happens. So it's not

Re: [M100] 27C256 pin 1 VPP - can it float?

sounds right Jeff, thanks for the check! Happens all the time that we see to do one thing or another. Y2K patch, in my case M10-converted-to-T102, other things. I guess, according to best practice, none of these easy plug and play upgrades comply as they would all have NC on pin 1. Agreed on the

Re: [M100] 27C256 pin 1 VPP - can it float?

I checked the Commodore 128 schematics last evening as they were made with an option ROM socket inside which could accept EPROMs. It was also not uncommon for them to have EPROMs fitted for the main system ROMs form the factory when they were low on masked ROMs. They have VPP tied to +5V on

Re: [M100] hardware scrolling patch

Created a page to host information on the patches used- M100/T102 Hardware scrolling patch - Bitchin100 DocGarden On Thu, Mar 10, 2022 at 11:31 PM Stephen Adolph wrote: > Follow up on this- > I found that my