[cctalk] Re: Papertape-Reader Decitek 442A9: need manual/schematics

[Jon Elson via cctalk]

On 5/16/24 15:15, Martin Bishop via cctalk wrote:
Micha
That the board is TTL and 2 layer by the look of it makes reverse engineering 
rather more tractable : good luck.

The 25p D pin outs for readers/punches seem substantially standardised,

I believe the standard is RS-323 (all search attempts assume 
you mean RS-232).  The logic levels are 12 V or so, so not 
quite TTL compatible.

Jon