16 Sep
2003
16 Sep
'03
10:29 p.m.
Mike Ford wrote:
At 06:14 PM 9/16/03 +0200, Ed wrote:
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
--
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.