BOARD MOD HISTORY

ALL BOARDS 1.0

Original WinDraft capture, intended for wire-wrap assembly.
Archived in 'wirewrap' directory.
The original revision of the Principles describes these boards.

ALL BOARDS 1.1
Reworked for etched board layout.
Lots of pin reassignments, especially in the connectors.
The Principles needs to move to a new revision to reflect this.

TYPEWRITER BOARD 1.1

The tstat sheet goes away entirely; the lines monitored by it now go to the mux on trcv2.
The Principles needs to reflect this.

ALL BOARDS 2.0

Redone for VME chassis.
We're down to two boards.
TSC1/TSC2 go back to the Typewriter Latch and we rely on relay inertia.
Lots more pin reassignments.  Provision for Card board.

VME 6U Board dimensions:

9190 x 6300
300 No Component each side
P1 pin A1 is at 420,220
P2 pin A1 is at 5675,220
P1 mounting holes at 220,120 and 3720,120
P2 mounting holes at 5055,120 and 8755,120
300 No Component on each side of P1 and P2
200 No Component to inside of eject mounting holes
Front panel mounting holes at 220,6180 and 8755,6180
Front panel is 108 from board edge
Front panel is 95 thick
Board is 70 thick * Our Champ50F-90 needs 62

Connectors:

DB25F-90 is AMP #745783-4.
DB15F-90 is AMP #745782-4.
Pin 14 is 318 from front panel and therefore 210 from board edge.
Cable-end plugs are 2200 across.

Euro96 is AMP #650473-5 but it's on back order at DigiKey.  An
acceptable substitute is AMP #650947-5.

DB15 mounting holes are 1315 apart, DB25 are 1850.
DB15 body is 1545 wide.
Adjacent connectors' mounting holes must be at least 400 apart.
Pin 1 is 435 from the front panel.
6300-(435-108)=5973.

Champ36F-90 is surplus from Wacky Willy's.
It's a standard profile connector preassembled with a bail kit.
Its mounting holes are 2350 apart.  Signal pins are 85/170 apart.
Pin 1 is 550 from the front of the shield, 575 to the front of
the bail hinge (i.e., the front panel).
6300-(575-108)=5833.

Champ50F-90 is AMP #555149-1 .  Letter of ack. to AMP (Qty 6@$10ea).
It's a low-profile design with integral bail.
Its mounting holes are 2950 apart and
408 from the front panel, so pin 1 is 408+85=493.
6300-(493-108)=5915.

Champ36F-IDC is AMP #555983-1 .  " (Qty 4@$5ea).

P1:
Gnd A9 A11 A15 A17 A19 B20 B23 C9
+5V A32 B32 C32
+12V C31
-12V A31

P2:
Gnd From PC A15 A31 C1 C8 C17 C24 (Use all of these!)
Gnd From VME B2 B12 B22 B31
+5V B1 B13 B32

Paper board Champ36s:
Gnd 29-32, 34-36