18887Re: WTD-serial terminal
- Nov 7, 2010Hi Richard,
There are several issues with producing an encoded ASCII to PS2 keyboard interface converter, so I'd be surprised to see one made.
1) You may have a couple of encoded ASCII keyboards, but the keyboards are rather scarce, which limits the market. Quite a few Apple-1 clone builders end up scrounging them from complete Apple II plus computers.
2) Sequences like control-alt-delete being held down on a PS/2 keyboard would be tricky to replicate, because a typical parallel ASCII keyboard interface doesn't present state information about a key being currently up or down.
I have made a batch of adapter kits that go the other way, PS/2 keyboard to parallel ASCII, but that was done primarily because of 1) above. I think Vince put a PS/2 interface on his replica-1 for the same reason.
--- In firstname.lastname@example.org, Richard Cini <rich.cini@...> wrote:
> Ok, one more thought. Does anyone know of a reasonable parallel-to-PS/2
> converter? I have an ASCII keyboard or two laying around and with the proper
> encoding could be used with the PS/2 interface on the Pocketerm. I did some
> searching and there are quite a few for MAME arcade build-outs (I have one),
> but they use discrete switch inputs to ground and convert it to a keyboard
> More Googling ahead...
> On 11/2/10 7:45 PM, "Richard Cini" <rich.cini@...> wrote:
> > On 11/2/10 8:17 AM, "Gene Buckle" <geneb@...> wrote:
> > On Mon, 1 Nov 2010, Richard Cini wrote:
> >>> > Gene --
> >>> >
> >>> > Actually I looked into it after I saw this email. It¹s a great item but
> >>> > unless ³packaged² correctly, it looses something in the look and feel
> >>> area.
> >>> > I guess with the right keyboard (like an IBM ³clicky² keyboard) and a
> >>> custom
> >>> > case (like the MAME arcade kind of thing, but desktop), it could result in
> >>> > good reproduction. The second serial port is a bonus, as you can use that
> >>> > (hopefully) as a paper tape input.
> >>> >
> >> It almost begs a nice wooden enclosure that would replace the Model M
> >> keyboard case as well as provide a housing for the PCB and maybe a 14"
> >> LCD. :)
> > Look at this: eBay item 150514710557. It¹s a Heath H9 terminal. Not being a
> > Heath guy, I didn¹t know this existed. It¹s about the right form factor,
> > approximately, for a hacked together Pocketerm and 14² LCD monitor. The case
> > could be wood and metal like the SOL or maybe something else. Hmmmm....
> > Rich
> Rich Cini
> Collector of Classic Computers
> Build Master and lead engineer, Altair32 Emulator
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