Re: ADM-3A Lower case ROM issue

2016-12-22 Thread Eric Smith
>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

RE: ADM-3A Lower case ROM issue

2016-12-22 Thread Steve Hatle
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" <cctalk@classiccmp.org> Take a look at the silk screen on the board - ISTR there

Re: ADM-3A Lower case ROM issue

2016-12-14 Thread Jörg Hoppe
Am 14.12.2016 um 20:13 schrieb Steve Hatle: Original Message Subject: Re: ADM-3A Lower case ROM issue From: Jörg_Hoppe <j_ho...@t-online.de> Date: Wed, December 14, 2016 9:00 am To: cct...@classiccmp.org By accident, I just now restored an ADM3 (not the "A"

RE: ADM-3A Lower case ROM issue

2016-12-14 Thread Steve Hatle
Original Message Subject: Re: ADM-3A Lower case ROM issue From: Jörg_Hoppe <j_ho...@t-online.de> 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-rearr

Re: ADM-3A Lower case ROM issue

2016-12-14 Thread Jörg Hoppe
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

RE: ADM-3A Lower case ROM issue

2016-12-14 Thread Steve Hatle
Original Message Subject: Re: ADM-3A Lower case ROM issue From: Jörg_Hoppe <j_ho...@t-online.de> 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-rearr

Re: ADM-3A Lower case ROM issue

2016-12-14 Thread Al Kossow
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

Re: ADM-3A Lower case ROM issue

2016-12-13 Thread Ian S. King
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