RK11-C disk controller
The RK11-C is the earliest version of the RK11 disk controller. (Nothing is known of the -A and -B, if they ever existed as products.)
Like many of the earlier large peripheral controllers for the PDP-11, it was a large custom wire-wrapped backplane which bolted into the front of a 19 inch rack, such as an H960; into it plugged about 40 small M-Series FLIP CHIPs.
The backplane is wired for connection to a standard DEC indicator panel, but no inlay for such has even been sighted, although the RK11-C Engineering Drawings allow one to work out exactly what such an inlay would have looked like.
There is also a rare variant of the RK11-C, the 'Double Buffer' RK11-C.
Contents
RK11-C module count/location tables
The following tables give a listing of the Flip Chips used in the RK11-C, and their location in the backplane.
Module counts
(Drawn from module utilization drawing, confirmed in module count chart):
Single height boards:
Type | Count | Function |
---|---|---|
G736 | Jumper | |
G740 | Disk selection | |
M002 | 15 Loads | |
M105 | Address selector | |
M111 | 2 | Inverter |
M112 | 5 | NOR gate |
M113 | 7 | 10 x 2-Input NAND gates |
M115 | 3 | 8 x 3-Input NAND gates |
M116 | 3 | 6 x 4-Input NOR gates |
M117 | 3 | 6 x 4-Input NAND gates |
M119 | 2 | 3 x 8-Input NAND gates |
M121 | 3 | AND-NOR gates |
M141 | 2 | AND/NOR gates |
M149 | 10 | 9x12 NAND wired OR matric |
M161 | Binary to octal/decimal decoder | |
M163 | Dual binary to decimal decoder | |
M203 | 4 | SR flip-flops |
M205 | 3 | 5 x 'D' flip-flops |
M207 | Flip-flops (3-3 configuration) | |
M208 | 2 | Buffer shift register |
M214 | 3 | Data storage register |
M216 | 5 | 6 x flip-flops |
M236 | 12-bit binary up/down counter | |
M238 | Synchronous 4-bit up/down counter | |
M239 | 2 | 3 x 4-bit up/down counter/register |
M304 | 3 | One shot delay |
M307 | 3 | Integrating one shot |
M405 | Crystal clock | |
M611 | High speed power inverter | |
M617 | 6 x 4-input NOR buffers | |
M623 | 3 | Bus driver |
M782 | Interrupt control | |
M784 | 3 | UNIBUS receivers |
M796 | UNIBUS master control | |
M797 | Register select | |
M798 | UNIBUS drivers |
Double height boards:
- M795 - Word Count and Current Memory Address
Module Utilization Chart
The Flip Chip module utilization chart for the RK11-C backplane is as follows (* = Connector):
Slot | A | B | C | D |
---|---|---|---|---|
1 | UNIBUS in | |||
2 | UNIBUS out | |||
3 | ||||
4 | ||||
5 | M105 | M784 | ||
6 | M782 | M79 | ||
7 | M795 | |||
8 | M784 | M784 | ||
9 | M623 | M307 | ||
10 | Disk bus 2* | M623 | M307 | |
11 | M623 | M307 | ||
12 | Disk bus 1* | M207 | M163 | |
13 | M798 | G736 | G740 | M405 |
14 | M149 | M149 | M116 | M161 |
15 | M149 | M149 | M304 | M119 |
16 | M149 | M149 | M113 | M113 |
17 | M239 | M238 | M216 | M141 |
18 | M239 | M214 | M115 | M115 |
19 | M214 | M214 | M121 | M112 |
20 | M208 | M208 | M111 | M111 |
21 | M203 | M203 | M112 | M112 |
22 | M149 | M149 | M205 | M117 |
23 | M149 | M149 | M203 | M203 |
24 | M121 | M002 | M116 | M115 |
25 | M216 | M797 | M611 | M617 |
26 | M141 | M119 | M113 | M304 |
27 | M304 | M112 | M112 | M113 |
28 | M236 | M121 | M216 | M216 |
29 | M205 | M117 | M117 | |
30 | W130* | M113 | M113 | |
31 | 6775* | M113 | M205 | |
32 | 6775* | M116 | M216 |
W130 = Maintenance board
6775 = Cable to indicator panel
Double Buffered RK11-C module count/location tables
The following tables give a listing of the Flip Chips used in the Double Buffered variant of the RK11-C, and their location in the backplane.
Module counts
(Drawn from module count chart):
Type | Count | Function |
---|---|---|
G736 | Jumper | |
G740 | Disk selection | |
M002 | 3 | 15 Loads |
M105 | Address selector | |
M111 | 5 | Inverter |
M112 | 7 | NOR gate |
M113 | 10 | 10 x 2-Input NAND gates |
M115 | 4 | 8 x 3-Input NAND gates |
M116 | 3 | 6 x 4-Input NOR gates |
M117 | 4 | 6 x 4-Input NAND gates |
M119 | 2 | 3 x 8-Input NAND gates |
M121 | 3 | AND-NOR gates |
M141 | 2 | AND/NOR gates |
M149 | 12 | 9x12 NAND wired OR matric |
M161 | Binary to octal/decimal decoder | |
M163 | Dual binary to decimal decoder | |
M203 | 4 | SR flip-flops |
M205 | 4 | 5 x 'D' flip-flops |
M207 | Flip-flops (3-3 configuration) | |
M208 | 6 | Buffer shift register |
M214 | 3 | Data storage register |
M216 | 5 | 6 x flip-flops |
M236 | 12-bit binary up/down counter | |
M238 | Synchronous 4-bit up/down counter | |
M239 | 2 | 3 x 4-bit up/down counter/register |
M304 | 5 | One shot delay |
M307 | 3 | Integrating one shot |
M405 | Crystal clock | |
M606 | 2 | Pulse generator |
M611 | High speed power inverter | |
M617 | 6 x 4-input NOR buffers | |
M623 | 3 | Bus driver |
M782 | Interrupt control | |
M784 | 3 | UNIBUS receivers |
M796 | UNIBUS master control | |
M797 | Register select | |
M798 | UNIBUS drivers |
Double height boards:
- M795 - Word Count and Current Memory Address
Module Utilization Chart
The Flip Chip module utilization chart for the RK11-C backplane is as follows (* = Connector):
Slot | A | B | C | D |
---|---|---|---|---|
1 | UNIBUS in | |||
2 | UNIBUS out | |||
3 | ||||
4 | ||||
5 | M105 | M784 | ||
6 | M782 | M79 | ||
7 | M795 | |||
8 | M784 | M784 | ||
9 | M623 | M307 | ||
10 | Disk bus 2* | M623 | M307 | |
11 | M623 | M307 | ||
12 | Disk bus 1* | M207 | M163 | |
13 | M798 | G736 | G740 | M405 |
14 | M149 | M149 | M116 | M161 |
15 | M149 | M149 | M304 | M119 |
16 | M149 | M149 | M113 | M113 |
17 | M239 | M238 | M216 | M141 |
18 | M239 | M214 | M115 | M115 |
19 | M214 | M214 | M121 | M112 |
20 | M208 | M208 | M111 | M111 |
21 | M203 | M203 | M112 | M112 |
22 | M149 | M149 | M205 | M117 |
23 | M149 | M149 | M203 | M203 |
24 | M121 | M002 | M116 | M115 |
25 | M216 | M797 | M611 | M617 |
26 | M141 | M119 | M113 | M304 |
27 | M304 | M112 | M112 | M113 |
28 | M236 | M121 | M216 | M216 |
29 | M205 | M117 | M117 | |
30 | W130* | M113 | M113 | |
31 | 6775* | M113 | M205 | |
32 | 6775* | M116 | M216 |
W130 = Maintenance board
6775 = Cable to indicator panel