Return to Main Page1401 Condensed Logic
This document is pages 33 through 84 of some unknown , unnumbered document -
The material is related to - but definitely not identical to - IBM Document G24-1477-01401 DATA FLOW link to bitsavers The following section contains a set of flow charts that are designed as recall diagrams for the various operation codes.
Use these flow charts as a guide in determining the troublesome areas of operation.
FIGURE Title 23 I-Phase 24 Indexing 25 Manual Address Setup 26 Manual Entry 27 Add or Subtract, & Part 2 28 Reset Add or Subtract 29 Simplified Multiply/Divide 30 Multiply 31 Divide , & Part 2 32 Move 33 Move Record - missing 34 Move Digit Move Zone 35 Move and Binary Code (Scramble) 36 Move and Binary Code (Unscramble) 37 Load 38 Store - missing 39 Address Modify 40 Branch 41 Branch Modification 42 Compare 43 Set WM 44 Clear Operation 45 Clear WM 46 Stop 47 No Operation 48 Edit, & Part 2 49 Move Zero Suppress 50 Expanded Edit , & Part 2, & Part 3 51 Read Operation, Load Key and Hole Count Part 2, & Part 3 52 Punch Operation, Hole Count Part 2, & Part 3 53 Print Operation 54 Storage Scan 55 Storage Print-out 56 Print Buffer Storage 57 Forms Control 58 Space Key 59 Move and Load Tape 60 Load Read Tape 61 Load Write Tape 62 Expand Compressed Tape 63 Read Compressed Tape 64 File Operation - missing 65 Inquiry Operation - missing
