IMSAI 8048 Control Computer (8048CC)

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IMSAI 8048 Control Computer (8048CC)

Postby MikeSD on Sat Nov 12, 2011 5:42 pm

I'm looking for any documentation on the IMSAI 8048 Control Computer. I have already contacted IMSAI but have not heard from them. I also have made extensive searches on the internet and can't find any documentatio on the IMSAI 8048 Control Computer.

Specifically I'm looking for:

1) Pinouts of connectors
2) Memory Maps showing system memory allocations
3) Entry points to program monitor
4) Any other documentation showning functions in software and how it's used.

Any help would be great. I have one of these boards and am buzzing it out, but having this info will save a great deal of time.

Mike
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Re: IMSAI 8048 Control Computer (8048CC)

Postby tezza on Sat Nov 12, 2011 6:53 pm

Now an IMSAI is certainly a computer I'd like to have in my collection. Hope you manage to find the docs you're looking for Mike.
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Re: IMSAI 8048 Control Computer (8048CC)

Postby MikeSD on Sun Nov 13, 2011 5:17 am

It was kind of a long shot posting this request. Since there were fewer than 350 of these made, it's not likely I'm going to have much luck finding documentation.

I have begun buzzing out the hardware and creating a schematic. That will be relatively easy. But it's the built in software that will be the challenge. I guess I could brute force it and hand disassemble the entire program. I may have to do that. But since I'm retired, I have plenty of time. :D

I have already tested the board and know it's functional. I have posted a video on YouTube, if members aren't familar with the IMSAI 8048CC (Control Computer).

http://www.youtube.com/watch?v=-FEyjvgVtL0

In the video I made a small mistake and called the Monitor ROM a Monitor RAM. Obviously it's an EPROM. :lol:

Mike
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Re: IMSAI 8048 Control Computer (8048CC)

Postby micko on Sun Nov 13, 2011 5:52 am

wow, nice machine. any chanse of sharing eprom content ?
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Re: IMSAI 8048 Control Computer (8048CC)

Postby MikeSD on Sun Nov 13, 2011 10:20 am

The first link has it at the bottom of the page. I was already aware of those sites. IMSAI still exists, in terms of someone owning the rights to the name. I had already contacted the site that had the photo with manual but they said they don't have the manual or computer... that it's just a museum site and someone else actually owns/owned the computer. I'm trying to find that person.

I have all the datasheets for each of the components.
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Re: IMSAI 8048 Control Computer (8048CC)

Postby Carcenomy on Sun Nov 13, 2011 11:37 am

Huh... it's like an Intel powered KIM-1. Has more I/O connectors, but otherwise a very similar style of machine.
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Re: IMSAI 8048 Control Computer (8048CC)

Postby GePu on Sun Jan 01, 2012 11:33 pm

Great that you got a running board.
I'm wondering if you could disclose the part list or at least the device name of the chip that is dealing with the keypad and the display. I assume from the board picture that its a 8279.
I'm gonna to build a new one IMSAI 8048 from scratch and like to use nearly the same parts...

Thanks

GePu
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Re: IMSAI 8048 Control Computer (8048CC)

Postby made-of-quarks on Fri Jul 13, 2012 5:30 am

I am looking for the IMSAI 8048CC operating manual. I have a readable copy of the schematic.
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Re: IMSAI 8048 Control Computer (8048CC)

Postby Mr. Timewise on Wed Jan 30, 2013 8:28 am

This is a response to an old post, I know...

I have an IMSAI 8048 which I purchased in November of 1977. This includes all the documentation and printed source code which was supplied at the time. If you are still interested, I can scan the manual pages and forward them on to you.
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Re: IMSAI 8048 Control Computer (8048CC)

Postby GePu on Thu Jan 31, 2013 5:59 am

Mr. Timewise wrote:This is a response to an old post, I know...

I have an IMSAI 8048 which I purchased in November of 1977. This includes all the documentation and printed source code which was supplied at the time. If you are still interested, I can scan the manual pages and forward them on to you.


@ Mr. Timewise
I'm wondering if the system is still working, isn't?

Best regards from Germany
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Re: IMSAI 8048 Control Computer (8048CC)

Postby Mr. Timewise on Fri Feb 01, 2013 7:59 am

GePu wrote:
Mr. Timewise wrote:This is a response to an old post, I know...

I have an IMSAI 8048 which I purchased in November of 1977. This includes all the documentation and printed source code which was supplied at the time. If you are still interested, I can scan the manual pages and forward them on to you.


@ Mr. Timewise
I'm wondering if the system is still working, isn't?

Best regards from Germany


Thank you for asking. I had to try it last night just to be sure something had not failed in the 35 years since the IMSAI 8048 was powered up!

The answer is YES, everything is working!

I have a pdf file of all the documentation. Send me a private email with your email address and I'll email a pdf file to you. The file is nearly 24 MB. I can also provide a Intel .hex file of the source code.

Image Image Image Image Image Image Image Image Image Image Image Image
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Re: IMSAI 8048 Control Computer (8048CC)

Postby m.haardt on Sat Mar 23, 2013 7:13 am

Hello,

I asked Mr. Timewise, but got no response so far. Does anybody have that file on the 8048CC? I still play with a 8048 from time to time and I am curious how the IMSAI system was designed. I am also interested in the hex dump of the ROM or whatever else may be available for this system.

Michael
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Re: IMSAI 8048 Control Computer (8048CC)

Postby GePu on Sat Mar 23, 2013 12:18 pm

m.haardt wrote:Hello,

I asked Mr. Timewise, but got no response so far. Does anybody have that file on the 8048CC? I still play with a 8048 from time to time and I am curious how the IMSAI system was designed. I am also interested in the hex dump of the ROM or whatever else may be available for this system.

Michael


Hi Michael,

I have the ROM hex dump and the schematics.
Just send me your email....

GePu
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Re: IMSAI 8048 Control Computer (8048CC)

Postby m.haardt on Thu Mar 28, 2013 7:43 am

Thanks a lot for the schematics. I really would appreciate the manual as well. As can be seen from the images above, it contains the monitor source code. A few hours with a disassembler revealed some things, but resulted in more questions than answers.

Michael
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