Signal
|
Function
|
PC2A
|
Enables data from PC to the A Bus
|
MA2A
|
Enables data from MA to the A Bus
|
MEM2Y
|
Enables data read from memory to the Y Bus
|
PC2Y
|
Enables data from PC to the Y Bus
|
MA2Y
|
Enables data from MA to the Y Bus
|
AC2X
|
Enables data from AC to the X Bus
|
PC2MA
|
Enables data from PC to MA
|
EA2MA
|
Enables data from the effective address generator to MA
|
RNONE
|
Enables data to pass through the shifter unchanged
|
IO2Z
|
Enables input data from the I/O Bus to the Z Bus
|
Z2MA
|
Enables data from the Z Bus to MA
|
LDIR
|
Enables loading the instruction register from the Y Bus
|
LDPC
|
Enables loading PC from the Z Bus
|
INCPC
|
Enables incrementing PC
|
LDMA
|
Enables loading MA
|
LDMB
|
Enables loading MB from the Z Bus
|
LDAC
|
Enables loading AC from the Z Bus
|
LDL
|
Enables loading data into the link register
|
PC2MEM
|
Enables writing data from PC to memory
|
ALU2MEM
|
Enables writing ALU output data to memory
|
MEMWR
|
Enables a memory write operation
|
