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Saving Our CLASSIC Heath 8-Bit Machines! Saving Our CLASSIC Heath 8-Bit Machines! The Society of Eight Bit Heath Computerists' Monthly Newsletter Volume V, Number 5 $2.50 a copy, $24.00 a year December, 1990 Subscription/Order Blank on Page 9 "Nothing L i ke This Ever Happened Hi th Our Old Heathki t Computer!" ®0G 1990 SEBHC JOURNAL Volume V, Number 5, Page 2 The READER ’S MAILBOX Dear Lenny, [Hey, Dave! Thanks for so generously offering up your extra Because I do believe in our crusade to save the [H/Z] 8- copy of HDOS 2.0. We don’t need it here, but surely there’s bit aachines, I [have] sent copies of the enclosed letter to soae deserving H/Z 8-bit user who’s willing to take it off all the vendors listed in the last [V5:3] edition of the your hands for the “handling and shipping cost" of—say, $35. SE8HC JOURNAL. [See text of Corky’s letter below. — ed] Also, this is an excellent season for soaeone new to coapu- Keep up the good work Lenny! ters to start out learning how to run their ‘senior aachine" with soae very good "senior operator" helping thea get that "CORKY" C E KIRK jr, 270 Kapualam Street, Hilo, HI 96720 HDOS 2.0 systea up’n running. We think that it’s best that whoaever wants or needs your HDOS 2.0 very badly will contact "Gentleaen: you directly, Really Soon Now! And please keep us inforaed, "On-going coaaents in the Society of Eight Bit Heath Coa- y’all hear?! — ed] puterists aonthly newsletter (SE8HC JOURNAL) out of Ann Arbor Michigan, and wore currently in the October 1990 issue (Vol- Dear Lenny, uae V, Nuaber 3), talk of the need for support of the I’a looking for Microsoft’s BASIC COMPILER on 5.25" hard- suppliers who are supplying products to the 8-bit area of the sector HDOS discs. Do you think the JOURNAL can help ae lo­ coiputer hobby. cate a copy? If possible, I’d like to get an un-registered "Editor Leonard 'Lenny' Geisler, along with his correspon­ copy which I would then register with Microsoft before using dents continue to keep readers up-to-date on things happening it. to our 'senior-citizen' computers in their day-to-day lives. Presently I have a CP/M soft-sector version, but since I Their references to Heath hardware and the repair thereof has don’t use that operating systea, it hasn’t been used at all. been augmented by suppliers such as yourselves who have re- If there's anyone interested, please contact ae at the below- aade soie of the boards or have iade the next generation of listed address by wail, or by CoapuServe Eaail—ay IDI is hardware available. 73770,2333. "This is a letter of 'Thanks’ to you for your efforts in Thanks! our behalf. "Sincerely, MARK HUNT, c/o USPHS Alaskan Native Hospital, Barrow, AK /s/ C E Kirk, jr." 99723; phone, 907-852-9257 (30 sec answering aachine) [Well, thank you, Corky, for taking tiae froi your very busy [Greetings, Mark! You’re right close to good ole Sandy Claws schedule to send your circular letter to all our still-in- up there in Alaska; what do you hear froa hia? Any exciting business vendors! Now, if those sate vendors will take a 8-bit news, whatever?! We have Microsoft’s HDOS BASCOM which little of their own tiae to lake up and send us one or lore we ARE NOT willing to part with because we’re still trying to 7-inch wide by 9-inch high black-and-white "reproducible" get it to work for us! We also have the CP/M BASCOM-80 advertising copy sheets, we shall be delighted to print version and have tried to get it to work, also with Very Con­ it/thea FREE OF CHARGE in future editions of the SEBHC JOUR­ fusing Results. (Why does the ’.A8S or ’.COM file end up NAL. In this dog-eating-dog world, vendors and clients both nearly twice as big as the original M8ASIC prograa?!) We’re need all the Mutual help there is available—and then soee! fairly sure that there’s at least ONE SEBHC JOURNAL reader We are here, doing our best, but you vendors eight send us a who has that HDOS 2.0 BASCOM set you’re looking for. Do keep line or two of your own for publication because you’ll get a us inforaed of your progress in the "desperately seeking BAS­ *FREE* one-year subscription if we print your article. — ed] COM software" search. — ed] Dear Lenny, Enclosed you’ll find ey renewal cheque. Keep up the good + HAPPY HOLIDAYS to All Our Valued Subscribers! ♦ work...at least soeeone still supports the old 8-bit aachines —although it seees that Zenith doesn’t want to! If you [or a JOURNAL subscriber] has a need for it, I have an extra copy of HDOS 2.0 which I’a willing to donate To The A Happy Word Froa Your Editor: That hornbly-EXPENSIVE ‘Ir­ Cause and if you want it, I can send it to you. It has the revocable Lease Agreeaent" (for the Canon NP-155 copier we’ve original aanual, discs and all, but it’s in hard-sector been struggling to print your SEBHC JOURNAL on for the past 3 foraat. years) FINALLY EXPIRED! We now have a NEW Canon PC7RE "desk­ Thanks again! Also, hats off to all those who still sup­ top" copier, and a just-opened nearby copy shop now aass-pro- port the H/Z 8-bit line of aachines. Shall they live long duces SEBHC JOURNALS—aachine "collating" 4 stapling included (as well as their aachines)! —aore umforaly, faster and CHEAPER than we ever have. They usually finish a 200-copy, 5-sheet edition in under 4 hours! DAVE SACKOVICH, 7963 Eaton Street, Arvada, CO 80003 SEBHC JOURNAL Volume V, Number 5, Page 3 Our "ASK RXCK” F e sl t u r e H19 DISPLAY SPEEDUP-PART TWO between the end of systea RAH at 4100H and start of tne by N. E. Associate Editor Rick Swenton Display RAH at F800H, there’d be no problem with a 2k system RAH (the 6116) occupying 4000H through 4800H. The extra 1792 [Last month, Rick told you how to take the basic changes to memory bytes are wasted, but a single 6116 IC is cheaper than your H19/89/90’s Terainal Logic Board (TL8) which result in a two 2112 chips, which are not readily available in high-speed 150k faster (2HC/s to 3NC/s) clock speed and «uch faster dis­ versions. play-refresh time, thereby eliminating those horrid "black flecks" in the display. Here's the concluding Part Tao of With Superclock installed (or an extra 6116 in its’ place) his article.] the added 2k memory for the second page of screen storage oc­ cupies address 8000H through 87FFH—still not in our way. If you’re now using Superclock, you can piggy-back a 24- The memory access is ambiguously decoded so RAH also appears pin IC socket onto the Superclock IC and plug the 6116 RAH IC to be at any address which has A15 high and A14 low, such as with its’ bent-out leads into this socket—being sure to 9000H, A000H, and 8000H. This is also tru for the Display observe correct IC orientation, of course! Or, if you don’t Hemory at F800H, and appears to be at any address where both have the Superclock, but would like to have emulation of it, A14 and A15 are high, such as C800H, D800H, and E800H. This you can piggy-back TWO 6116s, with the bottom one having all is so because only A14 and A15 determin which bank of memory pins in the socket. This produces a "software" Superclock to access. You have a choice of ROH, system RAH, Superclock where the time display powers up as garbage, but will run and RAH, or Display RAH. display time correctly after setting it. You’ll also enable all the other Superclock features such as second screen page, Note that I had to examine the Superset ROH’s machine lan­ and windows. See page 23 of the Superset/Superclock manual guage to find the Superclock’s memory address. and set jumper JP2 (JP23) as described there. With Super­ clock installed (or the extra 6116), you can leave pin 21 Here are the addresses of vendors supplying parts recom­ fully connected between all ICs and the socket, since mended in part one for installation in the H19 TLB speedup Superclock wiring during installation applies the R/W signal. modifications: For those readers interested in theory: Pin 20 on 6116 is JAHECO ELECTRONICS JDR HICRODEVICES the Output Enable line, and is tied to ground (6116 pin 12) 1355 Shoreway Road 2233 Branham Lane to enable the 6116 outputs. Pin 18 of the 6116 is the Chip Belmont, CA 94002 San Jose, CA 95124 Enable line. When low, this line turns on the 6116. Pin 18 415-592-8097 800-538-5000 is tied to the 2112 Chip Enable line at pin 13. Finally, pin ($25 minimum order) (No minimum order) 21 of the 6116 is the Read/Wnte control signal which is low 6116P-2 $2.95 HH6116-2 $4.95 to Write, and high to Read. This line is connected to the 6116LP-2 $3.25 (low power version) HH6116LP-2 $5.49 2112 R/W line at pin 14.
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