MAS281 Dynex, MAS281 Datasheet - Page 26

• Manufacturer Part Number: MAS281
• Description: MIL-STD-1750A Microprocessor
• Manufacturer: Dynex

MAS281
* M = memory, P = processor (5 OSC cycles), B = processor (6 OSC cycles),
a = average if more than one alternative exists
wa = weighted average favouring one or more possible alternatives
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Operation
FLOATING-POINT
Extended-Precision Floating-
Point Load
Extended-Precision Floating-
Point Store
Floating-Point Absolute Value
of Register
Floating-Point Negate Register
Floating-Point Compare
Extended-Precision Floating-
Point Compare
Floating-Point Add
Extended-Precision Floating-
Point Add
Floating-Point Subtract
Extended-Precision Floating-
Point Subtract
Floating-Point Multiply
Extended-Precision Floating-
point Multiply
Floating-Point Divide
Extended-Precision Floating-
Point Divide
Table 7a: Instruction Summary (continued)
Op Code/Ext
8A
9A
AC
BC
F9
3X
4X D
F8
FB
FA
A9
2X
4X 8
A8
AB
AA
B9
2X
4X 9
B8
BB
BA
C9
2X
4X A
C8
CB
CA
D9
2X
4X B
D8
DB
DA
Mnemonic
EFL
EFST
FABS
FNEG
FCR
FCB
FCBX
FC
EFCR
EFC
FAR
FAB
FABX
FA
EFAR
EFA
FSR
FSB
FSBX
FS
EFSR
EFS
FMR
FMB
FMBX
FM
EFMR
EFM
FDR
FDB
FDBX
FD
EFDR
EFD
Format
D, DX
D, DX
R
R
R
B
BX
D, DX
R
D,DX
R
B
BX
D, DX
R
D, DX
R
B
BX
D, DX
R
D, DX
R
B
BX
D, DX
R
D, DX
R
B
BX
D, DX
R
D, DX
M
5
5
1
1
1
2
2
3
1
4.25a 2.75
1
3
3
4
1
5
1
3
3
4
1
5
1
3
3
4
1
5
1
3
3
4
1
5
Cycles *
P
0
0
1.75
3.25
2.75
2.75
2.75
1.75
3.25
7.625
6.625
6.625
5.625
21.3125
19.3125
8.625
7.625
7.625
6.625
23.0625
21.0625
12.75a
12.75a
12.75a
11.75a
59.75
57.75
31.5
30 5
30 5
29.5
102.625
100.625
B
1
1
3.25a
3.75a
2.875wa
2.875wa
2.875wa
2.875wa
2.875wa
2.875wa
8.25wa
8.25wa
8.25wa
8.25wa
10.5625wa
10.5625wa
8.625wa
8.625wa
8.625wa
8.625wa
11.8125wa
11.8125wa
6.25wa
6.25wa
6.25wa
6.25wa
6.25wa
6.25wa
32.75wa
32.75wa
32.75wa
32.75wa
47.875wa
47 875wa