From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2003-01-22 10:18:18
Gideon,
> I don't have a source for the Am29F032B in SO44, but the board layout
> for the 32-bit processor that I made also has an Am29LV017D (2 MB) in
> TSOP-40 package.
Yes, I know that chip. Our first prototype uses that chip, but we had
several problems with it, starting from the fact that the cartridge port
connector was drawn as a mirror image. (You know, the VIC-20 cartridge
port pins are numbered from the opposite end than the C64 cart port.)
I think that SO44 is much easier to solder than TSOP-40. Also, I'd prefer
to use a 5-volt-only design. This design only needs three ICs and some
capacitors and resistors. A 3-volt Flash would need a 5-volt tolerant
logic chip with some 64 I/O pins. The VIC-20 cartridge only needs one with
32 I/O pins, in an easy-to-solder PLCC package.
Good luck for your project! Does the cartridge work on the C128 as well?
Are you going to publish the design?
Marko
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail 2.1.4.