LK201 emulator for PS-2 keyboard

Paul Koning paulkoning at
Wed May 12 11:53:27 CDT 2021

> On May 12, 2021, at 1:17 AM, Steve Malikoff via cctalk <cctalk at> wrote:
> Jonathan said
>> Just curious; have you thought of adding VSXXX-?? mouse emulation, using input from either USB or PS/2 mouse?
>> With a mini-DIN output? These are becoming hard to find (aside perhaps from our Australian member who mentions having them by the kg).
> Said Australian member here... I did indeed mention it. Here is a photo of exactly 3kg of DEC VSXXX-GA mice:

I remember those.  I thought Jonathan was talking about the round ones, but I suppose the protocol is identical.  There was also a tablet, same interface I believe.  I used one of those to trace some topo maps.

Does anyone know of protocol documentation for these devices?


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