RCA 70/46 Reference Manual page 114

Note
(Cont'd)
Privileged
Instructions
Bits 12 through 14 are the direct state initiation bits. The three-bit
direct state initiation codes that may be specified are as follows:
000 - Go
to
Machine Condition State P
4.
001 - Go to Interrupt Control State P
3.
010 - Go to Interrupt Response State P
2 •
011- Go to Processing State Pl.
Programming Note: The leftmost bit of the three-bit direct state
initiation field must be zero. (This is a programming restriction.)
Bit 15 is the indirect control flag bit. If indirect state control is specified
(bit 15
=
1), the three-bit direct state initiation field is ignored. The three-
bit interrupted state identifier (lSI), which indicates the last state inter-
rupted, specifies the state to be initiated. This information is contained in
the Interrupt Status register of the state being terminated.
If bit 15
=
0, direct state initiation is used.
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