CP/M Disk 12 - ZCPR2 for 56K System

Apple II 5.25 disk. published by LOGIC

Not listed in MAME yet

CP/M Disk 12 - ZCPR2 for 56K System © 198? LOGIC [Loyal Ontario Group Interested In Computers]

ZCPR2 A Z80 Replacement for the CP/M CCP ZCPR2 is intended for those persons who are currently using the CP/M operating system on their Apple II. It represents a significant development and improvement over the current code which makes up the CCP. CCP is short for Console Command Processor. It is the portion of CP/M that takes your input lines and interprets these commands to usable statements. A typical example is the DIR command: this command gives you a listing of all the programs in the 'catalog' or directory of your disk. The CCP is about 2K long and resides in the upper portion of memory. ZCPR2 is intended to replace the original CCP supplied by Digital Research and gives you many new commands and and features. The reason that this is possible is that the original CCP was written in 8080 code, whereas the Z-80 chip on your CP/M interface card is capable of a more powerful instruction set. By rewriting the CCP functions in Z-80 code, it was possible to improve the commands and implement new ones. ZCPR2 provides several resident commands in addition to those resident commands found in the standard CP/M CCP. The standard commands (DIR, ERA, TYPE, SAVE, REN) are joined by LIST, JUMP, GO, and GENINS. These can be replaced by other commands, being ERASE, RENAME, PROTECT, PAGE, PRINT, PATH and WHEEL. For example, the TYPE command will type a file to the screen, with a pause every 24 lines. The SAVE command allows you to save by decimal or hex and by pages of sectors. The REN command prompts you if you rename a file to an existing file name. LIST will list a file to the printer without the need for a CTRL-P. JUMP will begin execution at a specified memory location. In addition to the improvements in the intrinsic commands, there have been a series of valuable utility programs written to take advantage of the increased power of ZCPR2. These fill a second disk. For those who wish to maximize their use of memory, the 60K version of CP/M has been implemented in . This is available on another disk. To speed up the rate at which text is written onto an 80-column card in the Apple, two video drivers have been written to work with ZCPR2. One of these improves the performance of a Videx (or Videx compatible) card, while the other works with the Multiflex card (popular in the Toronto area). These drivers are on another disk, along with a FILER program (disk manipulation) which takes advantage of the power of ZCPR2. ZCPR2 is accompanied by lengthy documentation (almost 200 pages of it), which is available from LOGIC as well. It explains how to install ZCPR2, gives the rationale of ZCPR2 and is a thorough user's guide which discusses both the intrinsic and the extrinsic commands thoroughly. It will become a well-used reference for your CP/M operations. ZCPR2 is a public domain program written by the CCP-GROUP (Richard Conn, Keith Peterson, Frank Wancho and Ron Fowler). It was developed in conjunction with Digital Research and Microsoft. ZCPR2 is a well conceived and well-implemented program which represents a significant improvement over the current CCP. Although there is some cost associated with the disks and documentation which makes up ZCPR2, the added capabilities offered by ZCPR2 are of value to anyone who is a serious user of CP/M software. The documentation for this system is thorough, totaling almost 200 pages. It explains how to implement ZCPR2 on your system what was the basis behind the development of ZCPR2, and how to maximize the use of ZCPR2 and its related utilities. You can use ZCPR2 without the documentation, but only if you are knowledgeable - it's not for the uninitiated.... The price is not given in the printout of this listing, as LOGIC is trying to reprint it at a reduced price. If you have a 56K Microsoft CP/M system, this disk is the one to use to modify it for ZCPR2. The modification requires the user to provide a copy of the file CPM60.COM. If you have this file, then you can implement ZCPR2 on your system. The implementation is easy.


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