hunterjwizzard
Veteran Member
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Hey that's really cool! I have no idea what it is. But that is really cool that you're trying to identify all of them!
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What is this? Post Photos of Mystery Items Here (vintage computers only)
- Thread starter billdeg
- Start date
firebirdta84
Experienced Member
My god...I cannot believe that I might have just found it! (In reference to this mystery terminal search)
Anyone ever hear of a Genesis One G-77?
Check it out!
genesisoneg77.blogspot.com
So of course, since the internet had so little on this, I HAD to make a website consolidating what little is out there...
Thanks, everyone...the community discussion across all resources led me to this!
Best,
AJ
Anyone ever hear of a Genesis One G-77?
Check it out!
Genesis One G-77 Terminal
I cannot believe that I might have just found it! Anyone ever hear of a Genesis One G-77 ? On a whim, I decided to (once again) Browse Al ...
genesisoneg77.blogspot.com
So of course, since the internet had so little on this, I HAD to make a website consolidating what little is out there...
Thanks, everyone...the community discussion across all resources led me to this!
Best,
AJ
Last edited:
firebirdta84
Experienced Member
Thank you...I MAY have just done it! Now for the mystery big-iron peripherals next...another day!
SunDown79
Veteran Member
Anybody know what this item from "The Tabulating Machine Company" is for ?
Its oldest item I own now I think (as the company went up in IBM in 1933 if I am not mistaken).
Its oldest item I own now I think (as the company went up in IBM in 1933 if I am not mistaken).
VERAULT
Veteran Member
- Joined
- Jan 30, 2012
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- 9,999
SunDown79
Veteran Member
Hmm dont think so but it could be a variation of the plate underneath the punchcard, that also has two raised edges.
But would wonder why they would need to loan that out
But would wonder why they would need to loan that out
Less of a "mystery" item, as I know what its supposed to /DO/ but more of a mystery company/mystery info situation?
(I know its an 8052AH-Basic 'trainer' board, but i'd love more info, and/or maybe someone who's sussed out the circuit diagram? I've got a bunch of them with the 8052AH-BASIC chips and SRAMs on them, but on pretty much every one there's leaky-battery residue-to-possible-PCB damage on the board opposite the blue edge connector?))
(I know its an 8052AH-Basic 'trainer' board, but i'd love more info, and/or maybe someone who's sussed out the circuit diagram? I've got a bunch of them with the 8052AH-BASIC chips and SRAMs on them, but on pretty much every one there's leaky-battery residue-to-possible-PCB damage on the board opposite the blue edge connector?))
syzygy
Veteran Member
I'm sure you have looked for the TEANEY 88 [as I did]. It is a bit of a stretch, but there is an EE , Dale Thorpe Teaney and he has mentored students who did 8052 Projects (https://digitalcommons.njit.edu/theses/2813/). Perhaps it is his design?
Gawd dang! That's basically the EXACT DESIGN of the board I have, aside from a few component labelling gaffes. (R10/R14 being actually R16/R14, and the Second (rectangular) C1 being actually D1, but that's off the top of my head/what stands out most to me)
This will DEFINATELY help me in figuring out if any of the boards work/if i could re-create a board and just transplant parts over to it/make a repro-board. Since i've got a crappe-tonne of those 8052-BASIC chips and SRAMs and the chips that go with them on the board. Only question now/thing to figure out is what is the purpose of the singular, extra chip on top of some of the boards, mounted on the plexi-covers and running to the board? A 74LS365A chip mounted near the SIP-R1-R8 area of the board... (I'm giving a guess of some sort of clock divider, since it has wires running near the crystal part of the board...)
mountainking
Experienced Member
I'm kind of a sucker for boards like this....
1. Mysterious - no markings that clearly identify what it is.
2. From the 70s (very early 80s can be ok too).
3. Has enough of the right chips to be a computer (even if it isn't).
4. Inexpensive ($10 plus shipping)
And to top off this find, the title of the listing simply read "Circuit Board", lol, and the description just said that it was a storage unit find and that the seller knew nothing about it.
Anyway.....anyone have any ideas what this board is or is from? Fyi, I don't have the ability to dump the eproms at the moment.
Notable markings on board: "01-529B REV A", "16 531 B REV A" and "PDS"
I've included a pic of a (sloppily written) list of the ICs on the board with their functions that I wrote up for myself. Date codes look to make the age of the board around 1979. Dig them curvy traces
1. Mysterious - no markings that clearly identify what it is.
2. From the 70s (very early 80s can be ok too).
3. Has enough of the right chips to be a computer (even if it isn't).
4. Inexpensive ($10 plus shipping)
And to top off this find, the title of the listing simply read "Circuit Board", lol, and the description just said that it was a storage unit find and that the seller knew nothing about it.
Anyway.....anyone have any ideas what this board is or is from? Fyi, I don't have the ability to dump the eproms at the moment.
Notable markings on board: "01-529B REV A", "16 531 B REV A" and "PDS"
I've included a pic of a (sloppily written) list of the ICs on the board with their functions that I wrote up for myself. Date codes look to make the age of the board around 1979. Dig them curvy traces
Eudimorphodon
Veteran Member
It’s a neat little single board computer, but… yeah, without dumping the ROMs it’s hard to even guess what it was *for*. It looks like the address and data lines from the CPU are routed straight to the neighboring ribbon cable in addition to the peripherals on the board, so it’s very possible there was a lot more to it originally.
Edit: can you trace where the analog input/output from the modem chip terminates?
Edit: can you trace where the analog input/output from the modem chip terminates?
mountainking
Experienced Member
Do you mean Rx and TX data pins on the modem?
And yeah, this may be just the brains of a larger system.
syzygy
Veteran Member
Concur.
Terrific piece. My thinking is that it is the brains of some kind of industrial controller. The lack of any real ID on the board is frustrating. The 6860 along with the relay suggests that it had dial up capabilities to control or get the status of whatever it was controlling. The standard phone isolation could have been external to the board. This might be a clue (along with reading the EPROMS) as to who made it and for what purpose.
Bruce Tomlin
Veteran Member
Yes, dump it, it will be disassembled quickly.
Eudimorphodon
Veteran Member
I was thinking the... (looking at the datasheet for the part).. Tx and Rx carrier pins. (Pins 10 and 17?) Not Tx/Rx Data, which are the serial pins going to the UART. The datasheet describes how those pins in a standard modem application would go to external filters and a phone duplexer, but I don't see an obvious header to connect to a phone jack...
The presence of that opamp on the board makes me kind of wonder if instead of using that chip as a telephone modem they might have been doing something like using it to drive a cassette interface?
I don't think I'm yet able to send DMs, since my posts are only (seemingly at 7 or so) so not sure if you got my response about YOUR question about buying a board for restoration. Let's just chat here for a bit about the boards till my post count gets high enough
Would you possibly be able to restore one of them for me if I sold you a few yourself? (And/or help me be able to restore MY own boards in the process?)
syzygy
Veteran Member
I did consider that but don't know enough about that chip to evaluate if that would be an easy way to do a cassette interface. That relay on the board certainly could be for one or the other. Not sure what else it would be doing there.
syzygy
Veteran Member
I did respond in DM and it looks like you also saw and responded. You will be up to 10 soon I guess, but, for continuity, yes, I am interested in trying to get a board working because it sounds like a fun project (famous last words) and it looks like they are genuine Intel chips from 87-88 (I could be wrong). The longer response is in DM.I don't think I'm yet able to send DMs, since my posts are only (seemingly at 7 or so) so not sure if you got my response about YOUR question about buying a board for restoration. Let's just chat here for a bit about the boards till my post count gets high enough
Would you possibly be able to restore one of them for me if I sold you a few yourself? (And/or help me be able to restore MY own boards in the process?)
mountainking
Experienced Member
Yeah, there's no headers on the board besides the two that the ribbon cables are connected to.
I doubt they would have used an expensive chip like the modem chip to do a job that be done very simply and easily with very few components. I think we probably need to assume that this board is just the microprocessor board of a larger system and that we can only figure out so much from this one board, unfortunately. Hopefully the eproms will tell us something, I have an eprom reader/programmer but I can't seem to get it and my MacBook to communicate. If anyone wants to volunteer to dump the eproms I will gladly ship them
wondow
Member
I don't know if I am at the right place, but I was looking for EMS cards and found this card on eBay. I can't find anything online about this card, but it seems to be an EMS... or XMS expansion card? Or something else? If it is EMS, it is worthless without a driver. There seems to be only one jumper on that card (DT55B USA Spectrum ENG).