The text read off it
[02.06.09]
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f) 'Pm' — any available unit of this model type on the symbolic channel specified is to be assigned to the file.
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g) 'Pkm' — an available unit on the symbolic channel, having this model number, is to be assigned to the file. k in this use without parenthesis indicates the order of preference for the channel so that if the number of available units on the channel is less than the total requested for the channel those with lower numbers are to be assigned to the same channel.
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h) System units may be assigned by:
- i 'IN' — the current system Input unit is to contain the file.
- ii 'OU' — the current system Output unit is to be used for a printed output file.
- iii 'PP' — the current system Peripheral Punch unit is to be used for a punch output file.
- iv 'UTk' — System utility tape k (non-parenthesized k = 1-4) is to be used for the file.
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i) Card equipment is assigned for a file by
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- 'RDX' — card reader, channel X
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- 'PRX' — printer, channel X
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- 'PUX' — card punch, channel X
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j) As a special option, an
*in the UNIT2 field indicates that the secondary unit of a file is to be any unit on the same channel and of the same model type, which is available after all other assignments have been made. At load-time if units are available, but of a different model, one will be assigned; if no units are available on the channel, no secondary unit is assigned prior to execution of the job.