What is the "Z-100 LifeLine"?

The "Z-100 LifeLine" has been a bimonthly journal (6 issues per year) for Z-100 owners and vendors and is currently published by Steven W. Vagts. Due to personal demands, however, beginning in 2007 the publishing schedule was separated from the calendar and was no longer published every two months. Each issue would only be published when articles were ready (roughly every two to three months) or when necessary for the needs of the readers. As it turned out, due to personal reasons, there were some lengthy gaps of two years in publishing.

The LifeLine serves as a communications vehicle to ensure readers have access to parts support and repair services, upgrade development and dissemination, and for problem resolution. Make me your sounding board if you have an issue with the Z-100.

The "Z-100 LifeLine" was intended to fill the void left by the failing and now defunct original Users' Group Magazines - "REMark" and "Sextant" Magazines and "CHUG" (The Capitol Heath Users' Group) Newsletter. Other popular periodicals of the time included "H-Scoop" and "BUSS", also now gone.


"Z-100 LifeLine" Guidelines:


WavesBullet     Affiliations

This newsletter is strictly independent and has no connection with what remains of Zenith Data Systems or Heath Company. To my knowledge, it is the sole surviving newsletter for ANY Heath or Zenith Computer System!


WavesBullet     Newsletter Inserts

Nearly every issue contains inserts meant for installation in the User's Manual, Technical Manual, or Software/Hardware Manuals. Information in past issues have information on Repair, Maintenance, Hardware Modifications or Additions, Software Problems and Fixes, MS-DOS and Computer Upgrades, and Support Services.


WavesBullet     For Sale / Wanted Column

All readers are entitled to free non-commercial "For Sale" or "Wanted" advertising for Z-100 related items. Any artwork must be camera-ready.


WavesBullet     Article Submissions

Articles are highly encouraged, but must relate in some manner to the H/Z-100; that is software must be able to run on, or hardware must be installable on, the H/Z-100. Articles describing special uses of the H/Z-100 is of particular interest.


WavesBullet     Reprints

Commercial use reprints are approved on a case-by-case basis. Non-commercial use reprints of any issue is permitted as long as proper credit is given to the "Z-100 LifeLine". Issues prior to issue number 31 (January 1994) were published by Paul F. Herman, Inc., 9317 Amazon Drive, New Port Richey, FL. Portions not specifically credited to other contributors were written by Paul and only he can approve commercial reprints of those issues.


WavesBullet     Liability

Use of the material presented in the articles or of items purchased through the LifeLine or this web site is strictly AT YOUR OWN RISK. I cannot ensure the accuracy of the material presented, test the items on every configuration of the Z-100, nor do credit and background checks. However, I will make every effort to serve you any way possible!


WavesBullet     Registered Trademarks

Registered Trademarks are often used in the text here on the Web Site and in the Newsletter. In order to protect these trademarks, it is important to acknowledge them as the property of their respective companies. As many of these companies no longer exist, it is doubly important to recognize them for their important contribution to the computing world. For readability and space, Heath, Heathkit, H-89, H-90, H-100 (Heath Company), Zenith, Z-DOS, Z-89, Z-90, Z-100 (Zenith Corp.) IBM, IBM-PC, PC-DOS (IBM Corp.), MS-DOS, MultiPlan (Microsoft Corp.), CP/M (Digital Research), Gemini (Gemini Technology Inc.), EasyPC (UCI Corp.), Scottie Board (Scottie Systems), SuperCalc (Sorcim/IUS Inc.), dBASE xx (Ashton-Tate Inc.), WordStar (MicroPro International Corp.), Epson (Epson America Inc.) Panasonic, KXZ-Pxxxx (Panasonic Corp.), and others are so acknowledged, though specific references are not made in each occurrence. Thank you. 


WavesBullet     Notice

The "Z-100 LifeLine" is now distributed free. Just drop me an e-mail with your address and phone number. Additional information, such as a description of your Z-100 and how you are using it would be nice, but not required. I will also continue to stock replacement parts. I have several Z-100 projects to keep me busy for many years to come. If you choose not to receive the LifeLine, each project's progress will also be reported here, though updating this website is laborious, time intensive, and often delayed, so please list this website as a 'Favorite' and refer back to it often.


WavesBullet     Back Issues

Back issues of all "Z-100 LifeLines" are still available for $3.00 each. However, issues #1 through 120 are now available on CD-ROM. Each CD-ROM covers 30 issues (#1-30, #31-60, #61-90, and #91-120) in PDF format for $20.00 each and obviously requires a PC-compatible computer with a CD-ROM drive to access, read, or print the issues. As I do not have enough issues yet to create a new CD-ROM for issues after #120, I list them here for your enjoyment. Feel free to print them out for your records. Note: The period between 2012 and 2019 saw a great transition in the Z-100 LifeLine publication. The earlier PDF documents were created by scanning the entire document to create the PDF document. These cannot be searched nor passages printed. The entire document must be printed. The later PDF files were created from within WordPerfect and passages can be copied or printed freely. These later documents also had full color pictures and better graphics. I hope you enjoy the changes. Finally, please note that I did not go back any further than Issue #121 to correct the email and website addresses. Please note that these have changed, when reading the earlier LifeLines. Thanks.

WavesBullet     "Z-100 LifeLine" issue #121 was mailed in July 2012!

This issue provided a new source of delay lines for the Z-100, asked the question whether CP/M would be capable of using our IDE Controller, and continued our Zenith ZVM-13x Series of Color Monitors, Part 2, that was begun in issue #120. The Attachments can be read here:  ZMonitor1.PDF  and  ZMonitor2.PDF

WavesBullet     "Z-100 LifeLine" issue #122 was mailed in August 2012!

This issue discussed my efforts to run CP/M on the Z-100, provided a description of CP/M Plus (aka CP/M 3), and discussed 22DISK, a CP/M <-> DOS Disk Interchange Utility. It also provided a Date patch for CP/M 3's DATE.COM. The insert contained an All-Base conversion program in assembly language for CP/M.

WavesBullet     "Z-100 LifeLine" issue #123 was mailed in December 2012!

This issue continued my working with CP/M and the 22DISK Utility, discussed disassembly of CP/M-85's ASSIGN.COM, and provided some thoughts on CP/M Assembly Language Programming Essentials.

WavesBullet     "Z-100 LifeLine" issue #124 was mailed in August 2013!

This issue discussed the "Error - Memory Parity or Buss", published Charles Hett's article "Substitute Backup Battery for Dallas Semiconductor DS1216E Smartwatch" (please read an update on the article in issue #128), and reported that Heathkit(R) was back - or at least sort of.

WavesBullet     "Z-100 LifeLine" issue #125 was mailed in July 2015!

This issue discussed setting IDE autoboot, choosing Picture Density for display on the computer screen or for printing family photographs, discussed the results of my IDE Compact Flash testing and showed a few purchase options of inexpensive units. It also reprinted a Z-100 Fan Replacement article by Eric C. Neilson (with permission, of course), which was published on the internet at "Antediluvian Designs" on February 8, 2015. It replaces our noisy Panaflo FBP-08B12H (39 db(A)) with a much quieter Noctua NF-R8 fan (17.1 db(A)) purchased from Coolerguys.com, with about the same airflow. As of January 2020, it runs about $10.00 on Amazon.

WavesBullet     "Z-100 LifeLine" issue #126 was mailed in April 2016!

This issue, in color, discussed my RAM tests on an older 768k Motherboard, introduced efforts to make an LCD monitor work with the Z-100, and discussed Video Logic Board repair. The inserts included the GBS-8219 VGA Converter, the GBS-82xx series VGA converter testing (two articles by Charles Hett), and installing a GBS-82xx converter in the Z-100.

WavesBullet     "Z-100 LifeLine" issue #127 was mailed in October 2018!

This issue described a Z-120 "All-In-One" with an internal color CRT!! The machine was introduced to the Z-100 public at the first Z-100 Get-together in Norfolk, Virginia, way back in November, 1990! It did catch a paragraph in issue #10 of the "Z-100 LifeLine", but then disappeared entirely, until it was offered to me in 2018. The brainchild of Lee Jones, Lee managed to fit the complete color system of a security monitor very neatly into a heavily modified Z-120 - an engineering marvel! I finally got to document the event as I think it should have been done. Several color pictures show the installation. In addition, we discuss the problems I had with the EasyPC and Gemini PC-emulator systems in that machine, and pass along a ZCLK (calendar/clock) Y2K software patch.

WavesBullet     "Z-100 LifeLine" issue #128 was mailed in December 2018!

This issue updated the SmartWatch mod mentioned above, provided greater details on a new ZCLK2 calendar clock board, and discussed some of my efforts to work with the new Gemini ROM chips - another lively issue. You will not want to miss it. The insert, ZCLK2Article, describes my new ZCLK2 board (see the following section on the ZCLK2), and an additional article, ZCLK2Clock, provides a complete User's Guide, including board layout and schematic. Enjoy.

WavesBullet     "Z-100 LifeLine" issue #129 was mailed on August 27, 2019!

Please note my new email address & check out my new website! This issue concentrates on notifying all of you of the website and email changes and the reason behind the move. It also describes my efforts to create a new website using Joomla!, how to purchase your own domain name and where to find a reasonably priced web host. This issue also explains my decision to go with the times and become paperless.

WavesBullet     "Z-100 LifeLine" issue #130 was published on January 15, 2020.  Happy New Year!

This issue introduces new, reasonably priced test equipment for persons new to electronics and trying to create a suite of handy test instruments on a budget. They are from China, and don't come with all the bells and whistles of the more expensive equipment, but for the price, they are certainly feature packed. This issue concentrates on two transistor testers - with additional features - the Mega328, and the GM328. This issue also updates my experience with Joomla! and website maintenance - not all of it good. Finally, it is also my 100th Issue of the Z-100 LifeLine! With reason to celebrate - you need to dust off ZBASIC to run a surprise graphics program. Two advantages of not doing this in a paper mailing - I'm not limited in size and I can include all the full color photos that I want! With the three massive enclosures, Mega328 Transistor Tester and GM328 Transistor Tester and GM328 Assembly Manual, this is my biggest issue ever - by 4 to 5 times! Enjoy.

WavesBullet     "Z-100 LifeLine" issue #131 was just published on March 1, 2020.

This issue explains the more interesting aspects of last time's ZBASIC program, CAKE.BAS, and covers several of my most recent Z-100 repair efforts, especially for troublesome motherboards. We also cover the preparation of the Z-100 MFM 'Winchester' hard drives, including a list of specifications used by PREP. Finally, it also continues introducing new, reasonably priced test equipment with the DL4YHF2 Frequency Counter and Crystal Tester. Enjoy.



"Z-100 LifeLine" Resources:


WavesBullet     Z-100 Software Library

The "Z-100 LifeLine" Software Library contains nearly 1,000 programs and routines covering every application ever submitted. Software is included from the original Users' Groups (including HUG, CHUG, and NOHUG), Paul F. Herman, and GernWare. As much as possible, the software is separated and saved to disk by application. While individual volumes are still available as usual, the entire library is now available on CD-ROM for $20.00. However, a PC-compatible computer with a CD-ROM drive is necessary to transfer the programs to a floppy drive format usable on the Z-100.


WavesBullet     Z-100 Software Archive Library

The "Z-100 LifeLine" Software Archive Library contains a copy of original licensed Software Applications for applications no longer available or supported by the original software developers. This software is maintained only for dissemination to licensed users who have lost the software due to disk damage. So as not to upset any copyright law enforcers, proof of license is required.


WavesBullet     Z-100 LifeLine Publications Library

The "Z-100 LifeLine" Publications Library contains computer hardware and software publications, manuals, and books that are available for loan or sale at reasonable rates.


WavesBullet     Z-100 LifeLine Article Index

A complete (through issue #100), comprehensive index to "Z-100 LifeLine" articles will be available here in the near future. I hope to update this index in the near future and combine it with an index to "Sextant" and "REMark". Copies of all back issues are available (see "Back Issues" above).


WavesBullet     Sextant Magazine Index

Also, a comprehensive index to "Sextant" Magazine articles has been completed several years ago. Ihope to combine it with the LifeLine index and a new REMark magazine index sometime as part of this web site update. Watch here for an update when it is complete. Meanwhile it is still available at the Earthlink Web Site. Copies of "Sextant" back issues are available ($5.00 per copy) as supplies last.


WavesBullet     Parts and Service

We maintain a complete inventory of all the standard parts for the Z-110 Low-Profile and Z-120 All-In-One series computers! Repair services are available. Most unique modifications and special boards are also available.