Re: VIC-20 "all games in one" cartridge update

From: john/lori (
Date: 2001-03-30 18:29:41

Why 3.3 volts?
Is there some good reason for that (the ROM only comes in an LV version
or something)?

Just curious

> I've now almost designed the printed circuit board for the VIC-20 memory
> cartridge.  It'll have 4 chips on the top side: Am29LV160D (2MB Flash
> ROM), HM62256B (32kB SRAM), 74LVX245 (data bus buffer), and Lattice 2032
> programmable logic chip.  On the bottom side there are only two 74LVX245
> chips that buffer the address lines.
> The 3.3 volt regulator and the programming interface for the Lattice 2032
> are missing,

Presummably the 74LVX245 does the level translation, but 74LVX__ aren't
supply are they? (the 74LVX__ are 5V tolerant in, but isn't there some
family for driving 5V?)

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