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What is this thing?

Capt. 2110

Experienced Member
Joined
May 23, 2015
Messages
362
Location
Texas
I got a small Intel 8088A CPU board for about $3 at an electronics surplus store. It has a 2*16 LCD, some pins on the bottom, and a 9v battery. It's missing a chip, and it's from 1989(This particular one is 1991 I believe). Does anyone know what it is?

t_img_0095_148.jpgt_img_0092_128.jpgt_img_0091_364.jpg
 

krebizfan

Veteran Member
Joined
May 23, 2009
Messages
5,338
Location
Connecticut
It looks like a very generic board. If you can read the EPROM (if it has one), that could provide the information as to what original device that board was placed in.
 

Capt. 2110

Experienced Member
Joined
May 23, 2015
Messages
362
Location
Texas
I don't think it has an EPROM, but I can tell you the chips. Left: Toshiba TC5565APL-10 Middle: Intel P80C88A-2 Right: Oki M1C55-5
I think it still works, but it doesn't do anything.
 

curtis

Veteran Member
Joined
Apr 30, 2003
Messages
1,176
Location
Amarillo, TX
The EPROM probably goes where that big empty socket is.

May have help some proprietary data on it so the original owner "sanitized" it by pulling the EPROM.
 

kyodai

Experienced Member
Joined
Jan 26, 2011
Messages
467
Location
Kerpen, Germany
Yeah very generic board. With that LCD display i guess it was some kinda control computer for simple tasks, maybe for some machinery or house automation.
 

griffk

Experienced Member
Joined
Jun 4, 2015
Messages
200
Location
Seattle, WA / Los Angeles, CA
Well, the TC5565APL is static RAM, and next to it is the blank, so that probably was ROM, or "maybe" more RAM, but without a company printed on the board somewhere, or accessible code on board which might give an idea as to usage, I'd say you got about $3-$5 worth of good embedded design parts, in the chips and LCD display!

P.S. IS there a company or LOGO printed on the board? That might tell us a little more about what this controller does/did???

gwk
 

Capt. 2110

Experienced Member
Joined
May 23, 2015
Messages
362
Location
Texas
Oops, sorry, it is an M81C55-5.
The board says
Rel 2
Model 88-1
Hamptech (c)1989
Houston, Texas USA

I only found an owner and location, and the amount of time it took probably qualifies me as a stalker.
I did ask this on another website, but I don't know if the answer is correct or not. I would like a second opinion.
 

Capt. 2110

Experienced Member
Joined
May 23, 2015
Messages
362
Location
Texas
I'm trying to find what the pins at the bottom of the board connect to, and I found the last one connects to a pin on the OKI called PB4. Does anyone know what PB4 is?
 

Capt. 2110

Experienced Member
Joined
May 23, 2015
Messages
362
Location
Texas
Maybe. I know it's a RAM chip and a timer, but I don't remember how it accesses the data. Maybe as simulating a pushbutton?
 
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