Modifiers For Five-character Branch On Indicator (B) Instruction
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| BCD Character | Unit | Meaning |
|---|---|---|
| Blank | 1401 | Unconditional—no word mark needed in next character |
| 1 | 1009 | in run condition |
| 1011 | punch in backspace operation | |
| 1011 | reader parity indicator on | |
| 1231 | auto select | |
| 1285 | error | |
| 1412 | control-check indicator on | |
| 1418 | late read | |
| 1419 | document to be read | |
| 1428 | late read or late reading mode change | |
| 1445 | printer error | |
| 7340 | hypertape unusual end | |
| 7740 | transmission complete with abnormal status | |
| DDC | transmission error | |
| 2 | 1009 | buffer available |
| 1011 | punch ready | |
| 1011 | reader ready | |
| 1231 | full buffer | |
| 1285 | end of line | |
| 1412 | reader-not-ready signal on | |
| 1418 | ready to engage | |
| 1419 | document under read head (PDS 4) | |
| 1428 | ready to engage | |
| 7340 | hypertape normal end | |
| 7740 | transmission complete successfully | |
| DDC | transmission ended by GMWM | |
| 3 | 1009 | good transmission occurred |
| 1011 | punch not ready to receive data | |
| 1231 | ready to read | |
| 1285 | reader transporting | |
| 1412 | read-check indicator on | |
| 1418 | document under selected read station | |
| 1419 | valid amount field | |
| 1428 | document under selected read station | |
| 7340 | hypertape control unit 7641 busy | |
| 7740 | receive request | |
| DDC | read request | |
| 4 | 1009 | reply-bad indicator on |
| 1011 | punch not ready to read | |
| 1231 | empty hopper | |
| 1285 | marked line | |
| 1412 | amount-field indicator on | |
| 1419 | valid process-control field | |
| 7340 | hypertape attention | |
| 7740 | 7740 attention | |
| DDC | write request | |
| 5 | 1009 | error reply acknowledgement |
| 1011 | punch overextended | |
| 1231 | read error or overrun | |
| 1285 | header information | |
| 1412 | process-control indicator on | |
| 1418 | document end | |
| 1419 | valid account-number field | |
| 1428 | document end | |
| 1445 | printer busy | |
| 6 | 1009 | program attention required |
| 1011 | punch supply reel low or chad box full | |
| 1231 | timing mark check | |
| 1285 | ready to read a line | |
| 1412 | account-number indicator on | |
| 1418 | character on line | |
| 1419 | valid transit-number field | |
| 1428 | character on line | |
| 1445 | carriage busy | |
| DDC | write in progress | |
| 7 | 1009 | end of message |
| 1285 | reader ready | |
| 1412 | transit-number indicator on | |
| 1418 | empty hopper and transport (end of file) | |
| 1419 | valid serial-number field | |
| 1428 | empty hopper and transport (end of file) | |
| 1445 | carriage channel 9 | |
| DDC | read in progress | |
| 8 | 1009 | end of file |
| 1285 | end of file | |
| 1412 | document-spacing-check indicator on | |
| 1418 | ready to read | |
| 1419 | auto-select | |
| 1428 | ready to read | |
| 1448 | carriage channel 12 | |
| DDC | system A stopped | |
| 9 | 1403 | carriage tape channel 9 |
| 0 | 1404 | validity error |
| ' or @ | 1403 | carriage tape channel 12 |
| > | 1448 | end of block |
| / | 1401 | unequal compare |
| S | 1401 | equal compare |
| T | 1401 | low compare |
| U | 1401 | high compare |
| V | 1301 | disk error |
| 1311 | disk error | |
| 1405 | read or write parity check or read back check error | |
| W | 1301 | wrong-length record |
| 1311 | wrong-length record | |
| 1405 | wrong-length record | |
| X | 1301 | uniqual-address compare |
| 1311 | uniqual-address compare | |
| 1405 | uniqual-address compare | |
| Y | 1301 | any disk-unit error condition |
| 1311 | any disk-unit error condition | |
| 1405 | any disk-unit error condition | |
| Z | 1401 | arithmetic overflow |
| ‡ | 1403 | printer error (record mark) |
| ( or % | 1401 | process check with process check switch off |
| 1440 | I/O check stop switch off | |
| \ | 1301 | access busy |
| 1311 | access busy | |
| J | 1419 | I/O channel-busy indicator |
| TAU | tape busy | |
| SIO | serial input-output busy | |
| K | TAU | end of reel (writing) or tape mark (reading) |
| L | TAU | tape error |
| N | 1301 | access inoperable |
| 1311 | access inoperable | |
| 1405 | access inoperable | |
| P | 1403 | printer busy |
| Q | 1407 | inquiry request |
| R | 1403 | carriage busy |
| ! | 1402 | punch error |
| * | 1407 | inquiry clear |
| + or & | 1442 | last card (Reader unit 2) |
| A | 1402 | last card if SS A is on |
| B | 1401 | SS B |
| 7340 | hypertape attention response | |
| C | 1401 | SS C |
| D | 1401 | SS D |
| E | 1401 | SS E |
| 7340 | hypertape end response | |
| F | 1401 | SS F |
| G | 1401 | SS G |
| H | 1402 | reader busy |
| I | 1402 | punch busy |
| ? | 1402 | reader error |
| < | 1448 | early warning |
Read more about this topic: IBM 1401
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