RCA Spectra 70 User Manual

BRANCHING
INSTRUCTIONS
FLOA TING-POINT
INSTRUCTIONS
OPTIONAL
FEATURES
APPENDICES
CONTENTS (Co nt/d)
Page
Introduction ................................................ 193
Sequential Execution ....................................... " 193
Instruction Formats ......................................... 193
Interrupt Action. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 194
Branch on Condition (BCR) (Be) ........................... 195
Branch and Link (BALR) (BAL) ............................ 196
Branch on Count (BCTR) (BCT) ............................ 197
Branch on Index High (BXH) ............................... 198
Branch on Index Low or Equal (BXLE) ..................... 199
Execute (EX) .............................................. 200
Introduction ................................................ 201
Data Formats ............................................. " 201
Representation of Numbers ................................. " 202
Normalization ............................................... 202
Instruction Formats ......................................... 202
Condition
Code Utilization .................................. " 203
Interrupt Action ............................................ 204
Load (LER) (LE) (LDR) (LD) .............................. 205
Load
and Test (LTER) (LTDR) ............................. 206
Load Complement (LCER) (LCDR) .......................... 207
Load Positive (LPER) (LPDR) .............................. 208
Load Negative (LNER) (LNDR) ............................ 209
Add Normalized (AER) (AE) (ADR) (AD) ................. 210
Add Unnormalized (AUR) (AU) (AWR) (AW) .............. 212
Subtract Normalized (SER) (SE) (SDR) (SD) ............... 213
Subtract Unnormalized (SUR) (SU) (SWR) (SW) ............ 214
Compare (CER) (CE) (CDR) (CD) .......................... 215
Halve (HER) (HDR) ........................................ 216
Store (STE) (STD) ......................................... 217
Multiply (MER) (ME) (MDR) (MD) ......................... 218
Divide
(DER) (DE) (DDR) (DD) ............................ 219
Feature 5001-46 - Memory Protect ........................... 220
Feature 5002-46 - Elapsed Time Clock. . . . . . . . . . . .. . . . . . . . . . .. 220
Feature 5019-46 - Elapsed Time Clock. . . . . . . . . . . . . . . . . . . . . . .. 221
Feature 5003-46 - Direct Control ............................. 221
Feature 5040 - Selector Channel ............................. 221
Feature 5041- Selector Channel ............................. 221
Feature 5042 - Selector Channel ............................. 221
A -
Summary of Instructions ................................ 224
B -
Program Interrupts ................................... " 237
C - Input/Output Service Request ............................ 239
D -
Extended Binary-Coded-Decimal Interchange Code .......... 240
E - USA Standard Code for Information Interchange.. . . . . . . . .. 241
F -
Character Codes ........................................ 242
G -
Powers of Two Table ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 247
H - Hexadecimal-Decimal Number Conversion. . . . . . . . . . . .. . . . .. 248
I - Scratch-Pad Memory Layout and Register Assignments 253
vii

RCA Spectra 70 Specifications

General

Brand	RCA
Model	Spectra 70
Category	Computer Hardware
Language	English