23 Jan
2015
23 Jan
'15
7:55 p.m.
FYI, the 24 to 28 pin adapters I mentioned previously have selectable
polarity chip selects:
http://store.go4retro.com/23xx-adapter/
----- Original Message -----
From: "Pete Turnbull" <pete at dunnington.plus.com>
To: <General at classiccmp.org>; "Discussion at classiccmp.org:On-Topic and
Off-Topic Posts" <cctalk at classiccmp.org>
Sent: Friday, January 23, 2015 9:53 PM
Subject: Re: VT101 8085 CPU Fault
On 24/01/2015 00:52, Johnny Billquist wrote:
On 2015-01-24 01:29, Robert Jarratt wrote:
> 1. Given the ROM is marked: CN55004N 8232, DEC TP03, 23-028E4-00, and
> it is 24-pin, is MCM68766 really the right choice?
As close as you'll get in an EPROM, modulo chip select polarities. Someone
on the list promised me a few some years ago, but I never got them :-(
> 3. Does anyone have a ROM image for the
VT101?
I don't, sorry, but if anyone get an image dumped, I'll host it alongside
the others on my website.
Given it's "8232", I could suspect
that it would be a 4K rom...
Nope, it's 8K. A DEC 23-xxxE4 part number specifies 8K ROM. I expect
8232 is the date code.
--
Pete
Pete Turnbull