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The Real Thing

Rare Working Apple 1 Computer Headed to Auction

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http://www.macrumors.com/2013/05/03/wor ... -estimate/
by sje
May Sun 05, 2013 4:30 am
 
Forum: replica 1 General Discussion
Topic: The Real Thing
Replies: 1
Views: 7340

Re: IMSAI

The IMSAI 8080 was a great machine back in its day. I know; I built and owned one. But its day was was long ago and the cost of a resurrection is high; Grant Stockly's Altair 8800 kit costs well over US$2,000 with only a few optional boards. The IMSAI rebirth project dates back to 2001 at least; if ...
by sje
Apr Mon 08, 2013 4:17 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: IMSAI
Replies: 21
Views: 45044

Re: IMSAI

The Earth has moved to the opposite side of its orbit since the last post, so I assume that the IMSAI 8080 rebirth effort has been abandoned indefinitely. I'm sorry to see this as I hoped things would be otherwise.
by sje
Apr Wed 03, 2013 3:04 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: IMSAI
Replies: 21
Views: 45044

Re: USB keyboards

Search for "inland ps/2 wired keyboard". I recently bought two of these and they work with the Micro 8800.
by sje
Dec Sat 01, 2012 9:18 am
 
Forum: Altair 8800 Micro
Topic: USB keyboards
Replies: 7
Views: 12650

Re: IMSAI

It has been two months since the initial announcement and I'm sure we would all be interested in reading about any new developments.
by sje
Oct Tue 02, 2012 1:02 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: IMSAI
Replies: 21
Views: 45044

Soroc IQ 120

Back in the Altair days I used a Soroc IQ 120 terminal which cost about US$800 at the time (1978). Each of the old monitors from the pre-LCD days had a relatively expensive CRT and power supply. The costs of these components was mitigated only by the large numbers manufactured, and this can't be don...
by sje
Sep Mon 24, 2012 12:20 am
 
Forum: Altair 8800 Micro
Topic: Lears Siegler ADM-3 Terminal
Replies: 5
Views: 11259

Re: Another run of Disk RAM drive boards

Hello Vince:

Have you made another run of these? I would like to order one of the disk RAM boards, and maybe some others would like to order one as well.
by sje
Sep Tue 11, 2012 2:01 pm
 
Forum: Altair 8800 Micro
Topic: Another run of Disk RAM drive boards
Replies: 31
Views: 51925

Ithaca Intersystems: DPS-1

The DPS-1 S-100 computer by Ithaca Intersystems was introduced in the late 1970s and was perhaps the last enthusiast computer with a classic front panel. Similar to the IMSAI 8080 box, the machine used a Zilog z80 processor. http://upload.wikimedia.org/wikipedia/en/8/85/Ithaca_DPS.jpg See: http://en...
by sje
Aug Sun 19, 2012 10:34 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: Ithaca Intersystems: DPS-1
Replies: 0
Views: 6223

Re: IMSAI

I can say that my IMSAI purchase money was completely refunded; I can't speak for anyone else. Given a choice between an near replica IMSAI (other than the power supply) versus something which looks a lot like the original but is very different electronically, I'll take the near replica. In other wo...
by sje
Aug Wed 08, 2012 1:20 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: IMSAI
Replies: 21
Views: 45044

Re: IMSAI

What needs to be specified is the extent of interoperability between the old hardware and the new. If one had old IMSAI hardware, could any of the boards (including the front panel and the CPU card) be inserted into a new system and then work? The 8051 was out of date twenty years ago; much better t...
by sje
Aug Sun 05, 2012 6:47 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: IMSAI
Replies: 21
Views: 45044

Re: IMSAI

Four items: 1) I don't think there is that much of a need for a separate, internal full PC board. 2) As I had read, the proposed IMSAI does not use an 8080 CPU, but rather one of the evolved Zilog designs with 20 bit or 24 bit addressing and a not strictly compatible instruction set. 3) Because of n...
by sje
Aug Sun 05, 2012 1:33 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: IMSAI
Replies: 21
Views: 45044

Re: IMSAI

Having built an IMSAI 8080 back in 1976, I can give my approval for this idea. But I have some concerns. Is the system to be offered close to the original product (other than safety related changes to the power supply)? Compare this with the Altair kit offered by Grant Stockly who seems to be gettin...
by sje
Aug Fri 03, 2012 1:51 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: IMSAI
Replies: 21
Views: 45044

Raspberry Pi availability

The US$35 Raspberry Pi Model B was released for sale yesterday, Leap Day, at 7 am local time in the UK. The 10,000 unit run was completely sold out within minutes. I'm trying to get a unit via the US distributor at http://www.newark.com but do not expect supply to catch up with demand until mid May ...
by sje
Mar Thu 01, 2012 10:32 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: An idea for future emulation projects
Replies: 6
Views: 14641

Re: Maybe a new kit coming soon

I was around at the time, and I recall seeing and trying a number of SWTPC machines. If I recall correctly, the 6800 preceded the 6502, and the 6502 team was forced to change parts of their chip because of too great a similarity to these of the 6800. The 6809 was the first eight bit processor to inc...
by sje
Mar Thu 01, 2012 10:27 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: SWTPcsbc 6809 was: Maybe a new kit coming soon
Replies: 22
Views: 54484

Re: An idea for future emulation projects

Two more thoughts: 1) It would be possible to use a Raspberry Pi board in a revision of Vince's Altair 8800 Micro and this could lead to more features at less cost. The extensive and excellent work already performed on the case, the front panel, the labeling, and other related hardware would all be ...
by sje
Feb Fri 03, 2012 2:59 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: An idea for future emulation projects
Replies: 6
Views: 14641
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