HP 3000 III Series Manual page 215

The MCU option code NIR enables the
Store field bus options (as in CRL)
to store the U-Bus into DCOR and to
initiate a high-request command. On
the following select cycle, DCOR is
read into the MCU-Bus and stored in
the CPU NIR Register.
System Microcode
Table 5-8. MCU Option Field Code Definitions (Continued)
I---------------I------T~--------·-----·------------~·
1 1
Fie 1d
I
1
Label and Name
I
Code
I
Description
1 I I
----------------·1---·
----~.----~.~--~-------------------
DPOP
1
10010 The DPOP MCU option code functions
(Data-POP)
I
the same as DATA and also pops the
I
stack.
1
NIR
I
01001
(Next Instructionl
Reg iste r)
OPND 11001
(Operand Register)
PB 01000
(PB-Re lative)
RND 10100
(Retur ned
Da
ta)
RNP 10111
RNS 11100
ROA 00111
ROD 10111
Same as NIR except that the MCU-Bus
is stored in the CPU OPND Register.
Same as ABS, except that it speci-
fies the PB-Bank Register used in
PB-relative addressing.
The MCU option code RND enables the
Store field bus options (as in CRL)
to store the U-Bus in ACOR and to
initiate a low-request command. The
DB-Bank Register generates the mod-
ule number used to initiate a data
fetch from memory. The returned
data is loaded into the NIR.
Same as RND, except that the PB-
Bank Register generates the module
number.
Same as RND, exce pt tha t the S tac k-
Bank Register generates the module
numb er.
Same as- RND, except that the ABS-
Bank Register generates the module
number and the returned data is
loaded into the OPND Register.
Same as RND,except that the DB-Bank
Register generates the module num-
ber and the returned data is loaded
into the OPND Register.
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....
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----~--------'-,-'~-_._------,-,_._.--'--------_.
__
...
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