22-02-2023, 01:07 PM
(22-02-2023, 11:22 AM)CheshireNoir Wrote: Cheers RedskullDC.
If I can find a 1771 variant that doesn't need +12V and -5V, then I'll stick with that. I was looking at the 1770, which seems to have a single density toggle.
(That's a long way down the road tho. Wanna get the RAM plumbed in first.)
John
Hi John,
All good.
1770 is basically the same as the 1772, but the 1772 has faster track stepping rates.
Be aware that the 1771 can produce "4 different data address marks", whilst the others can only produce/read *two*.
From memory, most of the DOSes which also appear on the Model3 only use the 2 DAMs which the 1791 (and later) chips can produce.
Cheers,
Leslie