>From the ADM3A Maintenance Manual, page 6-11:
The two character generator ROMs are rather straightforward. The upper case
> ROM is a standard masked part (2513) but the lower case ROM is a custom
> masked part. The one unusual thing about this is that all of the address
> lines into the lower cas
Original Message
Subject: Re: ADM-3A Lower case ROM issue
From: "Ian S. King"
Date: Wed, December 14, 2016 1:30 am
To: "General Discussion: On-Topic and Off-Topic Posts"
Take a look at the silk screen on the board - ISTR there's another chip
tha
Am 14.12.2016 um 20:13 schrieb Steve Hatle:
Original Message
Subject: Re: ADM-3A Lower case ROM issue
From: Jörg_Hoppe
Date: Wed, December 14, 2016 9:00 am
To: cct...@classiccmp.org
By accident, I just now restored an ADM3 (not the "A")!
Lowercase ROM was made w
Original Message
Subject: Re: ADM-3A Lower case ROM issue
From: Jörg_Hoppe
Date: Wed, December 14, 2016 9:00 am
To: cct...@classiccmp.org
By accident, I just now restored an ADM3 (not the "A")!
Lowercase ROM was made with an pin-rearranged 2706 EPROM.
Addition
By accident, I just now restored an ADM3 (not the "A")!
Lowercase ROM was made with an pin-rearranged 2706 EPROM.
Additional RAM was inserted, DIP switches were set: works perfectly.
However, with lowercase ROM installed and DIP switches set, but extra
RAM missing,
the Space "0x20" was display
Original Message
Subject: Re: ADM-3A Lower case ROM issue
From: Jörg_Hoppe
Date: Wed, December 14, 2016 9:00 am
To: cct...@classiccmp.org
By accident, I just now restored an ADM3 (not the "A")!
Lowercase ROM was made with an pin-rearranged 2706 EPROM.
Addition
On 12/13/16 5:50 PM, Steve Hatle wrote:
> I acquired an ADM3-A a while back from the NWA auction, and a
> generous friend was able to get me the lower case ROM chip that
> was "missing" from my terminal.
>
related to this
http://juliepalooza.8m.com/sl/adm3a-2.htm
has rom dumps
I was going
On Tue, Dec 13, 2016 at 5:50 PM, Steve Hatle wrote:
> I acquired an ADM3-A a while back from the NWA auction, and a
> generous friend was able to get me the lower case ROM chip that
> was "missing" from my terminal.
>
> I set the DIP switches and installed the ROM. When I turned on the
> termina