ALC Programming

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ALC Techniques

The information in the following pages was obtained from green-bar (yes it was green) listings from the early 1970s.  While this is mainly MVT days, the information provides good insight in ALC programming.

 The sample programs will be completed as time permits.  All the sample programs will be tested on the OS/MVS system.  The sample programs include:

Example of Description Comments
BSAM Basic sequential access method I/O Get started reading and writing card images
QSAM  Queued sequential access method I/O
BPAM Basic partition access method I/O How to read members from a PDS
TIMER Timer services with the operating system
WTO WTO, WTOR, WTL services How to communicate with the operator

and more!


The information on this site is the combined effort of a lot of people, please credit the authors if you use their information.
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For problems or questions regarding this web contact Bob.
Last updated: August 12, 2001.