HP 3000 III Series Manual page 211

System Microcode
Table 5-7. Special Field Code Definitions (Continued)
1--------------,
I I
Fie ld
I
Label and Name
I
Code
I I
---_._-~~-------
---
CFl 10010
(Clear Flag 1)
CF2 10001
(Clear Flag 2)
CF3
00111
(Clear Flag 3)
CLIB 01110
(Clear Indirect
Bi t)
Descr ipt ion
The Special field code CFl clears
CPU Flag 1 FF.
The Special field code CF2 clears
CPU Flag 2 FF.
The Spec ial fie ld code CF3 clears
CPU Flag 3 FF.
At the end of the cycle, CLIB sets
the Indirect Bit FF which masks the
indirect line until a NEXT or JLUI
option in the Skip field is en-
counte red.
CLO
(Clear Over flow)
CLSR
(Clear SR)
CTF
(Set Carry to
Flag
1)
DCSR
(Decrement SR)
FHB
(Flag to High
Bit)
HBF
(High Bi t to
Flag
1)
INCN
(Increment Name)
INCT
( Increment
Counte r)
11001
00010
00110
01001
01101
01100
01010
01011
The Special field code CLO clears
the status word overflow bit.
The Special field code CLSR clears
the SR Register. This is an asyn-
chronous reset. No other SR opera-
tion is allowed during that time.
The Special field code CTF stores
th~
ALU carry bit in the Flag 1 FF.
The Special field code DCSR decre-
ments the content of the SR Regist-
er by a count of one.
The Special field code FHB trans-
fers the content of the Flag 1 FF
to bi t
0
of the U-Bus.
The Special field code HBF trans-
fers the content of U-Bus bit
a
to
the Flag 1 FF.
The Special field code INCN incre-
ments the content of the Name Reg-
ister by a count of one.
The Special field code INCT incre-
ments the content of the Counter
Register by a count of one.
5-31