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[06.02.04]
B. Object-Time Tape Assignment
The assignment of physical units to the various files in the object program is performed by the Loader by processing the symbolic 'unit' columns (18-21 and 22-25) in the FILE cards which precede the binary object deck. For referencing purposes, the following definition of permissible symbolic units which may appear on the FILE cards is repeated. In the definition of permissible symbolic units requested by the programmer, the notation is as follows:
| Symbol | Meaning |
|---|---|
| X | is a true channel request and may be A, B, C, D, E, F, G, H. |
| Y | is a symbolic channel request and may be S, T, U, V, W, X, Y, Z. |
| k | is a relative unit request and may be 1, 2, 3, 4, 5, 6, 7, 8, 9, 0. |
| M | is a true tape model request and may be II or IV |
The permitted unit requests are:
| a. | blank | |
| b. | Model only | M |
| c. | True channel | X |
| d. | Symbolic channel | Y |
| e. | True channel, Model | XM |
| f. | True channel, Relative unit | X(k) |
| g. | Symbolic channel, Model | YM |
| h. | Symbolic channel, Relative unit | YK or Y(k) |
| i. | Symbolic channel, Relative unit, Model | YKM |
| j. | For secondary unit assignment after all other requests have been fulfilled | * |
In addition, the programmer may request the following SYStem units and card equipment.
| Symbolic Unit(s) | Meaning |
|---|---|
| IN, IN1, IN2 | System input units |
| OU, OU1, OU2 | System output units |
| PP, PP1, PP2 | System punch units |
| UT1, UT2, UT3, UT4 | System Utility tapes |
| RDX | Card reader, channel X |
| PRX | Printer, channel X |
| PUX | Punch, channel X |