Scorpio News |
January–March 1987 – Volume 1. Issue 1. |
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Page 52 of 63 |
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A number of very useful improvements can be made to the CCP. The standard CCP provides six built in commands (DIR, ERA, REN, SAVE, USER and TYPE). There is no screen paging support, no ‘PATH’, and precious little else.
There are two alternative software replacements for the CCP. The simplest approach to system improvement is to replace the standard CCP with CCPZ or earlier versions of ZCPR. These programs are virtually the same and are based on ZCPR in the SIG/M or CP/M User Group Library. ZCPR literally means Z(80) CCP Replacement. Since Z80 code is usually more compact than 8080 code, it is possible to include more in the available 2k. The resulting new CCP is compatible with the standard CCP, and provides all of the standard facilities. It also provides the following extra features which are more fully described in the .DOC files provided from the Library.
With a normal CCP if you issue a command like ‘STAT’ then CP/M will look for STAT.COM on the current drive and USER area. If the file is not found, CP/M will give up with a query ‘STAT?’.
With CCPZ/ZCPR a three level search is performed. The CCP will look in the current user area of the default drive. If the file is not found, user area 0 of the default disk is searched. If this fails, USER 0 of drive A: is searched. If the file is still not found, CP/M will give up with the usual query. This
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Page 52 of 63 |
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