IBM-PC keyboard for 6300 has anyone done this?

[Dave Tutelman]

In article <328 at neoucom.UUCP> wtm at neoucom.UUCP (Bill Mayhew) writes:
>
>I don't think that merly rewiring the plug on an IBM keyboard
>is adequate to get it to work with the 6300.  It looks like the
>baud rate is different to me, as I couldn't get it to work.  
	Actually, the whole protocol is a little different.  A transposition
	cable isn't enough to solve the problem.

>Two of
>our 6300s here have replacement keyboards.  One machine has an AT&T
>version of the Keytronic 5151 which even comes with a db-9 on the
>end of the cord.  
	I've used the Keytronics.  It's pretty nice, and I never noticed
	any incompatibilities.

	You might also try AT&T's new 302 keyboard, with better key placement
	and size than the original 301.  I'm using it right now.

>...
===============================================
>By the way, one of my older 6300's that was in the days of 256K and
>10 meg drives did indeed come with all the chips soldered to the
>board.  The only socket in the machine was a blank one for the
>8087.  We flamed the AT&T salesperson, who produced the AT&T memory
>expansion card to get it up to 512K.  I was suprised when I
>observed that the AT&T memroy card has to go in one of the slots
>that has the short socket near the front of the machine, although I
>don't see any reason why you couldn't use one of the expansion
>cards for regular pc-compatibles.
	Actually, the only reason is speed.  The speed ordering is:
   -	FASTEST - on the motherbaord.
   -	SLOWER - The plug-in board from AT&T gives a wait-state on each
		access.
   -	SLOWER STILL - Commercial plug-in boards using only the PC-bus.
		They don't use the full 16-bit capacity of the 8086.
		Remember that the PC and XT are 8088s with an 8-bit
		data bus.  Thus all their memory accesses are single bytes.
		The 6300's speed advantage derives in part from a two-byte
		data bus, with the extra byte on the "short socket".

>
>  --Bill
>
>(wtm at neoucom.UUCP)

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