Attempt at Compaq keybord swap with a PC keyboard (failed)
derschjo at gmail.com
Mon Jan 23 11:36:07 CST 2017
Just to be sure -- the PC keyboard you're using is an actual PC/XT
compatible keyboard, not an AT, correct? The PC/XT used a different
protocol and is incompatible with later keyboards...
On 1/23/17 8:53 AM, Randy Dawson wrote:
> Hi William,
> I did use the original kybd to trace out the clock and data, most of the keys work, and I have good scope shots. I am on it again today, because it sure seems like it should work, using a PC keyboard.
> I did not take scope shots on the first test, thinking it should just work.
> Hopefully its just a signal inversion, I cant imagine the protocol is that different. Each keypress looked like a byte of data, 8 cycles on the clock line with corresponding bits on data line.
> From: cctalk <cctalk-bounces at classiccmp.org> on behalf of william degnan <billdegnan at gmail.com>
> Sent: Monday, January 23, 2017 5:29 AM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Attempt at Compaq keybord swap with a PC keyboard (failed)
> Easier to fix the foam. But a tip to replace the keyboard...use the Compaq
> keyboard bare by pressing fingers directly on the board, verify that works
> that way (it should). Record the signals' wire path, match the replacement
> keyboard wiring.
> On Jan 23, 2017 12:45 AM, "Randy Dawson" <rdawson16 at hotmail.com> wrote:
>> This is the original Compaq I IBM PC clone, 8088
>> From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Fred Cisin <
> cisin at xenosoft.com>
>> Sent: Sunday, January 22, 2017 9:42 PM
>> To: General Discussion: On-Topic and Off-Topic Posts
>> Subject: Re: Attempt at Compaq keybord swap with a PC keyboard (failed)
>> On Mon, 23 Jan 2017, Randy Dawson wrote:
>>> I have luggable with the famous Keytronics foam kepad rot.
>> WHAT model Compaq?
>> 8088? 80286?
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