Mike Ford wrote:
>
> At 06:14 PM 9/16/03 +0200, Ed wrote:
>
> >This one is apparently made by Gr Electronics, who were based in the UK
> >and in the US.
> >This is based on the fact that is says 'GR 185-2' on the board.
> >I searched Google, but I couldn't find any info.
> >
> >As the housing was loose, I opened it, and it uses an Intel 8048
> >microcontroller, has 8
> >character and has a curled cable which has a DB25 connector at the end.
> >The cable has 7 wires, and when the battery door is opened (this device
> >get's it power
>
> Sounds like a device that I have seen for doing inventory and stock
> checking, db25 could be for a bar code or? Anyway people go up and down the
> aisles in markets with them filling in sku and quantity, periodically
> docking to download the data into some host.
Not likely in this case, 2 of the wires must carry the power, as there is no
own powersource in the terminal. I picked it up when collecting 4 11/34's at Shell,
and in one of the cupboard I found this pocket terminal.
I have opened the db25 plug, and pins 2 & 3 are wired, suggesting it is at least RS232.
Other pins are 4 (RTS, wired also to pin 20), pin 7 (GND) and pin 9 (+ voltage).
The pin assignment is according to the rs232 description.
There is an N8T15 & N8T16 chip on the board, are these similar to the M1488 & M1489
rs232 line driver chips?
Ed
--
Received on Wed Sep 17 2003 - 05:29:01 BST