RS232 voltage level converter box
cclist at sydex.com
Mon Nov 17 16:24:16 CST 2008
On 17 Nov 2008 at 18:55, Tony Duell wrote:
> Is there anything else in the nnit apart from 1488s and 1489s and PSU
> parts? Any logic?
> Is there any maker's name on the unit or on the PCB?
Tony, from the photos, it's a homebrew, built on a piece of
protoboard with hand wiring between the pads. No other logic, just
1488/89 ICs, which means that a supply of +/-12 or so had to come
over the cable.
Being homespun, it's hard to say what this might fit, although a
serial adapter for an early printer (the Epson MX-80, for example,
was sold with only the parallel adapter, even though serial comm
logic was present. The "serial" board was pretty much just level-
shifting to RS-232 levels.
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