2 Dec
2010
2 Dec
'10
5:20 a.m.
(once more, from the correct email account...)
Hi guys,
Does anyone have any details on the control protocol for the keyboard on
the AT&T 3B1?
A command list and/or scan code list would be most useful... or even
actual driver source code :)
I'm about a third of the way there with my emulator -- it's running the
BootPROM, passes the MAPRAM, VRAM and Base RAM self tests, and I'm well
on the way to implementing memory mapping/protection and the UI
interfaces (keyboard, mouse and video)... I'm not sure how to go about
emulating the telephony hardware though; I might just leave that
"unemulated" for now.
Thanks,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
2 Dec
2 Dec
8:09 p.m.
On 12/2/10 5:20 AM, Philip Pemberton wrote:
Does anyone have any details on the control protocol
for the keyboard on the AT&T 3B1?
A command list and/or scan code list would be most useful... or even actual driver source
code :)
kbd.h is in DEV351_6.IMD on bitsavers.
hopefully someone with a running machine can just send you the file out of /include/sys
a version of the driver is in
http://unixpc.taronga.com/ftp.uu.net/systems/att7300/kernel/nkbd.cpio.Z
there are probably other things on taronga that would be of use (like the Xinu port)
3 Dec
3 Dec
10:29 a.m.
On Thu, 2010-12-02 at 20:09 -0800, Al Kossow wrote:
kbd.h is in DEV351_6.IMD on bitsavers.
hopefully someone with a running machine can just send you the file
out of
/include/sys
There's another (more complete) set of disc images on
http://www.unixpc.org/floppies/ -- in dd format. Take the development
disc set (disk0[1-8]), and cat them together:
cat disk0[1-8] > devel.cpio
Open the cpio file in Midnight Commander, navigate to usr/sys/kbd.h, and
hit F3.
I get the impression that the protocol is fairly simple; a preamble byte
before the mouse/keyboard data, groups of three bytes for mouse data
(0x80 set for the 1st byte in a group, clear for the other two), a
preamble byte for keyboard data, then the keyboard data.
The fun part will be emulating the FORMAT TRACK, READ TRACK and WRITE
TRACK commands on the 2797 FDC... which of course is Job #1, seeing as
the machine won't boot without a floppy or hard drive :(
Thanks,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
1 p.m.
On Fri, 2010-12-03 at 11:50 -0800, Al Kossow wrote:
why don't you just add it to MESS, where these
devices are already simulated?
I've seen the MESS codebase. It's.... messy. Definitely shows its MAME
roots.
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
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