27 Jul
2006
27 Jul
'06
8:42 a.m.
Roger Merchberger schrieb:
Rumor has it that Holger Veit may have mentioned these
words:
It's well hidden: download the
"Replica 1 Firmware" firmware.zip file at
http://www.applefritter.com/taxonomy/term/229,131 (search path: the
Apple I owners Club page, from there to File Library / Drivers).
--
Holger Veit
This has been already done, and is available on
the Net. Look at the
schematics for the Apple I replica at www.applefritter.com;
this contains an ATMEL controller to convert a PC keyboard to the
7bit+strobe required for the Apple I. It is probably just a matter
of changing the translation table in the code to adapt to any
encoding. An ATMEGA8515 is maybe overkill for such a converter,
For that *exact* use, it may be overkill - but I've been wanting to
build an PS/2 -> CoCo adapter for quite some time out of one of my
currently unused 90S8515's I have collecting dust... The CoCo needs 2
8-bit ports for the keyboard matrix interface; and you could still
have an 8-bit port configured as a straight ascii backup.
I've wandered around that site for quite a while, and I found the
schematics, but no source code for the 90S8515/ATMEGA8515. Do you know
if it's available, or is it closed-source?