Commodore Pet ROM trouble... EPROM Substitutes...

From: Pete Turnbull <pete_at_dunnington.u-net.com>
Date: Thu Jul 22 17:42:25 2004

On Jul 22, 21:17, Philip Pemberton wrote:
> In message <10407221840.ZM22794_at_mindy.dunnington.u-net.com>
> Pete Turnbull <pete_at_dunnington.u-net.com> wrote:
> > On Jul 22, 13:09, wolfgang_at_eichberger.org wrote:

> > That should certainly work for reading.
> >
> Not if those pin names are correct. !G is Output Gate, i.e. !OE. I'd
connect
> all the pins straight through, except 18, 20 and 21.
>
> 2532 socket 2732 ROM
> 18 A11 21 A11
> 21 VPP no-connect
> 20 !E (PD/PGM) 18 !E
> 14 Vss 14 and 20 (Vss and !G respectively)
> Anything else is connected straight through
>
> I *think* that'll work. The only difference is that this grounds the
2732's
> !G (Output Enable) pin instead of rigging it high (Vpp is usually
connected
> to +5V for EPROMs that are wired for reading only).

Yep, well spotted.

-- 
Pete						Peter Turnbull
						Network Manager
						University of York
Received on Thu Jul 22 2004 - 17:42:25 BST

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