The following table shows the Control Registers as implemented in the simulator. The VC (variant character, octal) code is also the same as used on the front panel.

--VC----CR-- --VC----CR--  --VC----CR-- --VC----CR--
00 *CLC020CLC8 40WR160WR4
01CLC121CLC9 41ACC061WR5
02CLC222CLC10 42ACC062WR6
03CLC323CLC11 43ACC063WR7
04CLC424CLC12 44WR264CSR
05CLC525CLC13 45ACC165
06CLC626CLC14 46ACC166EIR
07CLC727CLC15 47ACC167AAR'
10SLC030SLC8 50WR370BAR
11SLC131SLC9 51ACC271
12SLC232SLC10 52ACC272
13SLC333SLC11 53ACC273
14SLC434SLC12 54ATR74AAR
15SLC535SLC13 55ACC375
16SLC636SLC14 56ACC376IIR
17SLC737SLC15 57ACC377SR

* Must be 10, 40, or 50 when used in PDT or PCB instructions.

This implementation provides register memory for all 64 control memory locations. Work registers are not used by this implementation and so may be used for any purpose.

ACC registers are actually shadows of the real data. The simulation formats real data into these registers when they are accessed, and endeavors to update real data when changed. Since three CRs represent a single floating point value, it is possible to get nonsense floating point values if the three CRs are updated inconsistently.