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Appendix A (cont'dJ
Instruction Summary
Operation
Operatior
Code
SPS
Instruction Time
Instruction
Code
Modifier
Mnemonic
1620 Modell
Notes
*Floating Subtract
02
FSUB
400 + looL Basic Time
If signs initially alike and numerical
80L Recomp. Time
value of Q data is greater than P data.
Halt
48
H
160
*Load Dividend
28
LD
4oo+40DN
DN = Number of digits, including
High-order zeros in the dividend.
*Load Dividend (I)
18
LDM
Same as above.
*Move Flag
71
MF
240
Multiply
23
M
560 + 40 DQ + 168 DpDQ
Multiply (I)
13
MM
Same as above
No Operation
41
NOP
160
Read Alphameric
37
RA
Card I/O 3.4 ms
Time for other units depends upon speed of
All other: See notes
unit and number of characters involved.
*Read Disk
36
320 + 20,000 + 2,0005
Q8 - Q9 must be 07
Qll=O
RDGN
Average Time
Read sectors - with WLRC
Qll
=
2
RDN
Read sectors - no W LRC
Q ll =4
RTGN
5 = Number of Sectors
Read Full Track - with WLRC
Qll=6
RTN
Read Full Track - no WLRC
Read Numerical
36
RN
Card I/O: 3.4ms
Time for other units depends upon speed of
All other: See Notes
unit and number of characters involved.
Set Flag
32
SF
200
Subtract
22
S
160 + 80 Dp Basic Time
If signs initially alike and numerical
80 Dp Recomp. Time
value of Q data greater than P data.
Subtract (I)
12
SM
Same as above
Same as above
*Transfer Numerical Fill
73
TNF
160 + 40 Dp
*Transfer Numerical Strip
72
TNS
160 + 40 Dp
Transmit Digit
25
TD
200
Transmit Digit (I)
15
TOM
200
Transmit Field
26
TF
160 + 40 DQ
Transmit Field (I)
16
TFM
Same as above
*Transmit Floating
06
TFL
240 + 40L
Transmit Record
31
TR
160 + 40 DQ
Write Alphameric
39
WA
Card I/O: 3.4 ms
Time for other units depends upon speed of
All other: See notes
unit and number of characters involved.
Write Disk
38
320 + 20,000 + 2,0005
Q8 - Q9 must be 07
Qll=O
WDGN
Average Time
Write sectors - with WLRC
Qll
=
2
WDN
Write sectors - no WLRC
Qll=4
WTGN
(5 = Number of Sectors)
Write Full Track - with WLRC
Qll=6
WTN
Write Full Track - no WLRC
Write Numerical
38
WN
Card I/O: 3.4 ms
Time for other units depends upon speed of
All other: See notes
unit and number of characters involved.
Dp = Number of digits, including high-order zeros, in the field at P
(I)
= Immediate
DQ = Number of digits, including high-order zeros, of Q.
ms
Milliseconds
QT
=
Number of digits, including high-order zeros, in the quotient.
WLRC = Wrong Length Record Check
DV = Number of digits, including high-order zeros, in the divisor.
*
=
Special Feature
L
=
Number of digits in mantissa.
77
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