The computer, Ingrid,  is a 486 133Mhz running the Redhat 4.1
distribution of Linux with kernel version 2.0.27.
It has 16MB of RAM and 800MB of available Linux HD space.

For the Digital I/O, we are using a Computer Boards
CIO-DIO 192 Digital interface board. It has 192
TTL Digital I/O lines and sits in a long ISA slot.
These ports are used to talk to send bench positions
to the LBC and get an OK back from the LBC. (More
signals will be added later)

We have a spare board that is currently not being used.

Computer Boards
125 High Street #6
Mansfield MA 02048
(508) 261-1123
(508) 261-1094 (FAX)
http://www.computerboards.com/

The current pin assignments are:

Port A1 - Unused
Port B1 - Output
   bits 0-3: 10" LBC
   bits 4-7: 26" LBC
Port C1 - Input (LBC OK signals after mirror movement)
                (26" goes low on light beam available while
                 10" goes high.)
   bit 0: LBC 26E1 ok 
   bit 1: LBC 26E2 ok
   bit 2: LBC 26C ok
   bit 3: LBC 26W ok
   bit 4: LBC SF ok
   bit 5: LBC 10E ok
   bit 6: LBC 10C ok
   bit 7: LBC 10W ok

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

For the serial I/O, we are using a Cyclades
Cyclom-8Yo 8-port ISA serial card. This board actually
has some smarts (which we don't actually need, but the
price and support were right - it was on sale at $199)
to offload some of the I/O tasks from the host CPU.
I had to rebuild the kernel with support for the Cyclades
serial drive (it is included in all new kernels) built-in.
On Ingrid, I also had to futz around with the BIOS settings
to get the Linux bootup reported BogoMIPS to ~60. The
BIOS settings I used are in Ingrid's box.

We also have a spare board that is not currently being used.

Cyclades Corporation
41934 Christy Street
Fremont CA 94538
510 770 9727
800 88CYCLADES
http://www.cyclades.com
(I found Rob in Tech Support to be VERY helpful.)

The available ports are /dev/ttyC0 --> /dev/ttyC7.
The current assignments are:

ttyC0 - Mac communication
ttyC1 - OSLVax communication
ttyC2 - VMGVax communication

ttyC6 - telescope guider
ttyC7 - PC Guider