Z System Upgrades CP/M Z System is first-rate, state-of-the-art software for your CP/M machine. ZCPR has been with us for over five years now, and has enhanced computer productivity for thousands of CP/M users. Z System is now a mature replacement for CP/M 2.2 or CP/M Plus, yet is "backward compatible" with almost all programs written for CP/M. This means that you can still run the CP/M programs you now use, yet take advantage of greatly increased power and performance at the same time. NZ-COM and Z3PLUS form the heart of Z System. They replace the most visible parts of CP/M 2.2 and CP/M Plus respectively, adding enhanced command processing, named directories, vastly improved resident commands, flow control processing, error handling, and much more. But it isn't necessary to master all of these (at least at first!) to take advantage of NZ-COM and Z3PLUS. In fact, though both packages come with several disks of software and excellent manuals, almost anyone can install either of these packages on their CP/M computer in just a few minutes' time. The price for either NZ-COM or Z3PLUS is $69.95 plus $3 shipping. The next step up in sophistication for CP/M 2.2 users is ZSDOS. ZSDOS replaces the less visible portion of CP/M 2.2 which controls program input and output. Through clever coding and exhaustive testing, the authors of ZSDOS offer significant improvements in performance, safety, and versatility for CP/M 2.2, including file time and date stamping, file archiving for faster backups, public files (accessable from all user areas), path access to files, and improved error messages and handling. As with NZ-COM and Z3PLUS, ZSDOS installation is completely menu-driven. ZSDOS comes with a collection of state-of-the-art utility programs and a 140 page manual to help you make the most of the extended features. ZSDOS costs $75 ($60 when purchased with NZ-COM) plus $3 shipping. Another path to system enhancement for CP/M 2.2 users with hard or RAM disks is available in the form of BackGrounder ii (BGii). BGii allows you to "suspend" any program at the touch of a button and use a wide range of resident commands such as DIR, REN, ERA, CALC, or TYPE. Then hit the button again and BGii quickly returns you to the program you suspended, right where you left off. Or use BGii's SWAP command and you're back at the CP/M prompt, ready to run any other CP/M program. When you're through, SWAP again and BGii returns you to your original program, exactly as you left it! Advanced "Cut" and "Paste" commands are also available for many terminals, allowing you to transfer sections of screen directly from one program to another. Print spooling, advanced key redefinition and recording capabilities, and a beautifully designed 140-page user's manual are included. Installation is menu-driven and easy. BGii is compatible with either ZCPR or CP/M 2.2, and costs $75.00 plus $3 shipping. Last but not least is DosDisk, a small but powerful program which allows you to read or write DIRECTLY to MS-DOS disks with your CP/M computer. No more file transfers--simply insert a standard MS-DOS DSDD diskette in your CP/M machine, type "DosDisk :", and away you go--all files on the diskette are now accessable by all of your CP/M programs--even files in MS-DOS subdirectories! DosDisk comes with a handsome 38-page user's manual, and is available preconfigured for most machines at just $30.00 plus $3 shipping. DosDisk is compatible with either ZCPR or CP/M 2.2. These and other fine products for CP/M and CP/M Plus are available from users groups around the country, or directly from Z Systems Associates. Sizeable discounts for users' groups are also available from Z Systems Associates through the Z Plan. The Z Systems Associates are: Sage Microsystems East Selling & Supporting the Best in 8-Bit Software 1435 Centre St., Newton Centre, MA 02159-2469 Voice: 617/965-3552 (9:00am - 11:30pm) Modem: 617/965-7259 (password = DDT)(MABOS on PC-Pursuit) Same-day shipping of most products with modem download and support available. Order by phone, mail, or modem. Shipping and handling $4 per order (USA). Check, VISA, or MasterCard. Specify exact disk format. and: Plu*Perfect Systems "==World-Class Software" 410 23rd Street, Santa Monica, CA 90402 Voice: 213/393-6105 (evenings) Modem: 213/670-9465 (leave message for "Bridger Mitchell") To order: Specify product, operating system, computer, 5 1/4" disk format. Enclose check, adding $3 shipping ($5 foreign) + 6.5% tax in California. Enclose invoice if upgrading BGii or ZRDOS. For more information on Z System, check at the above bulletin board systems, or consult The Computer Journal for excellent articles on ZCPR and CP/M. The Computer Journal is published six times a year by Publishing Consultants, 190 Sullivan Crossroad, Columbia Falls, MT 59912, phone 406/257-9119. An issue averages forty pages with few ads. Subscription rates are $16 for one year (6 issues), or $28 for two years (12 issues) in the U.S., $22 for one year Canada and Mexico, and $24 (surface) for one year in other countries.