Table of Contents
System Microcode
Table 5-9. Skip Field Code Definitions
I------r---·-·-·--------~~--------------I
I
Fie ld
I
I
Label and Name
I
Code
I
Des cr ipt ion
I
I
I
I
- . - ' - - - - - - - , - . -
- - -
•. - 0 _ _ - _ .
. _ ~
~
_ _
BIT6
00101
The Skip field code BIT6 sets the
NOP2 FF if bit 6 of the U-Bus word
is a logic
1.
BIT8
CRRY
(Car ry)
crRM
(Counter Max)
EVEN
00110
01000
11011
00010
The Skip field code BIT8 sets the
NOP2 FF if bit 8 of the U-Bus word
is a logic
1.
The Skip field code CRRY sets the
NOP2 FF if the
ALU
carry out is a
logic
1.
The Skip field code CTRM sets the
NOP2 FF if the counter contains all
ones.
The Skip field code EVEN se ts the
NOP2 FF if the U-Bus word is an
even number (U-Bus bit 15 is a
logic
0) •
Fl
01100
(Flag 1)
F2
01110
(Flag 2)
F3
11100
(Flag 3)
INDR
10100
( Indirect)
The Skip field code Fl sets the
NOP2 FF if Flag
1
FF is se t.
The Skip field code F2 sets the
NOP2 FF if Flag 2 FF is set.
The Skip field code F3 sets the
NOP2 FF if Flag 3 FF is set.
The Skip field code INDR
s~ts
the
NOP2 FF if the Indirect Bit FF is
set and the indirect signal is a
logic
1.
JLUI
NCRY
11001
01001
The Skip field code JLUI causes a
microjump to the ROM address speci-
fied by the LUT providing the indi-
rect condition (Skip field INDR
code) is not met.
If the indirect
condition is met, the microjump is
not executed.
The Skip field code NCRY sets the
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