Re: PS-2 Keyboard for Aplle II ?

["Randall Flagg" <rfs@_nospamz_apple2.com>]

I remember there actually was an external keyboard made by Brose for the 
Apple IIe which just replaced the encoder ICs:

"ASCII keyboard with proven Siemens STB11 keys. Corresponds to the latest 
ergonomic realizations and DIN 66234 for computer workstations. Seperated 
10-numberblock with cursor keys. Open and closed apple-keys. The keyboard is 
connected by an interface board which replaces the keyboard encoder IC 
(F13-14) an the keyboard ROM (F12). New improved interface board with finer 
contacts. For Apple //e only."





"David Wilson" <mcs6502@gmail.com> schrieb im Newsbeitrag 
1136022962.137253.229600@g43g2000cwa.googlegroups.com">news:1136022962.137253.229600@g43g2000cwa.googlegroups.com...
> Michael J. Mahon wrote:
>> While the Apple main board takes care of the $C010 keyboard strobe, the
>> keyboard adapter/encoder must supply a "new key down" strobe in addition
>> to the 7-bit ASCII.  This will do it for a ][ or ][+.
>
> The PS/2 adapter for the Replica-1 will do for this.
>
>> For the //e, it is trickier, since the //e keyboard connector interface
>> is an unencoded keyswitch matrix plus a few unmatrixed keyswitches.  It
>> would be trickier to emulate such a keyboard with a microcontroller,
>> since it would have to sync with the main board encoder scan.
>
> My design idea for this is a PCB which plugs into the AY-3600 and 2316
> keyboard ROM sockets and relocates these two chips to this PCB. A PIC
> or other suitable micro accepts data from both a PS/2 keyboard and the
> AY-3600 and drives the address pins of the keyboard ROM and the AKD and
> KSTRB pins on the AY-3600 motherboard socket.
>
> This way both keyboards can be used. I wonder if all four of the IIe
> motherboards (beige NTSC, PAL and platinum NTSC and international NTSC)
> have the AY-3600 & keyboard ROM sockets identically spaced - if not the
> board would have to plug into the ROM socket via a ribbon cable.
>