RCA Spectra 70 - Page 243

SUMMARY OF INSTRUCTIONS (Cont1d)
Branching Instructions (Cont/d)
Timing (lLsecl
Instruction
Op(16) Mnemonic Format Interrupt Action
Condition Code
(Average and Includes Staticizingl
70/46
Branch on Index
87
BXLE
RS
None.
Unchanged.
Branch = 11.60
Low or Equal
No Branch = 11.60
Execute 44
EX RX 1. Address error.
May be set by instruction being
6.96 + EX
modified and executed.
Floating-Point Arithmetic Instructions
Add Normalized
6A
AD RX
1.
Address error.
o - Result mantissa zero.
27.69
(Long)
2.
Significance error.
1 - Result mantissa less than
2A
ADR
RR
3. Exponent overflow.
zero.
22.63
4.
Exponent underflow.
2 -
Result mantissa greater
Add Normalized
7A
AE RX
than zero.
19.20
(Short)
3A
AER RR
3 - Result exponent overflow.
16.08
Add Unnormalized
6E AW RX
1.
Address error.
o - Result mantissa zero.
26.81
(Long)
2.
Significance error.
1- Result mantissa less th~n
2E
AWR
RR
3. Exponent overflow.
zero.
21.77
7E
AU RX
2 - Result mantissa greater
18.96
Add U nnormalized
than zero.
(Short)
3E
AUR RR
3 - Result exponent overflow.
15.84
69
CD RX
1. Address error.
o - Operands equal.
23.52
Compare (Long)
1 - Operand specified by 1st
29
CDR
RR
address low.
18.48
79
CE RX
2 - Operand specified by 1st
15.36
address high.
Compare (Short)
3 - Not used.
39
CER RR
12.24
6D
DD
RX
1.
Address error.
280.27
Divide (Long)
2. Exponent overflow.
2D
DDR
RR
..
Exponent underflow .
275.68
.:>.
7D
4. Divide error.
Unchanged.
83.00
DE RX
Divide (Short)
3D DER
RR
79.88