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- MC #3
- front cover
- Clock Calendar board
- Microtime 80 AB computer products, p.o. box 571 Jackson, nj. 08527
- time and date function. eight interrupts, batter backup
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- MC #3
- page 1 Editorial
- Jim Ferguson states that the Big Board and Xerox 820 are essentially identical.
- Xerox 820 can talk to both 5 1/4 and 8 inch disks.
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- MC #3
- page 2
- Letters Tom Mason
- Questions on RAM protection transistor. Reply = radio shack PNP. Editor
- recommends "CP/M Handbook" for intro to CP/M.
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- MC #3
- page 2
- Letters Joseph C. Kish
- disk drive CRC problems traced to flakey 24 V supply.
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- MC #3
- page 2
- Letters Mitchell E Timin
- Offer to sell TIMIN FORTH until Jan 1, 1981. Reply suggests other FORTHS
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- MC #3
- page 3
- Letters Jan-Henrik Johansson
- Comments on making Crowe Assembler work.
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- MC #3
- Page 3
- Letters Ron Jeffries
- Argues against adopting FORTH. Reply concerns UNIX (UNICA) and C language.
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- MC #3
- Page 3
- Letter Otto Hiller
- Double Density mod description. 4 Mhz mod described in letter.
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- MC #3
- Page 4
- Letter Gary Mion
- Heathkit H-19 used with Big Board. Mentions a formatting program FORMAT3.COM
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- MC #3
- Page 4
- Using Modem7 Andrew Beck
- Patches for Modem7 program to run on Big Board.
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- MC #3
- Page 5
- More 4 Mhz Philip Atkinson
- Another 4 Mhz mod. Results in 45% duty cycle. one chip change.
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- MC #3
- Page 5
- Moving Programs Don Retzlaff
- software listing to move program from low memory to high memory. ASM
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- MC #3
- Page 5
- Notes from Garland,Texas David Thompson
- Parts required for proper working of 4 mhz mod. Troubles with trying to
- mix 5 1/4 and 8 inch drives because of 1771's clock separator.
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- MC #3
- Page 6
- Reverse Video Cursor Andrew Beck
- Detailed modifications for modifying the Big Board I computer for reverse
- video. Includes software.
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- MC #3
- Page 8
- FORTH Words Arne A. Henden
- Introduction to FORTH. Versions of FORTH. Reviews Fig-FORTH, FORTH-79
- pico-FORTH, and polyFORTH. Mentions books named Starting Forth and
- Threaded Interpretative Languages.
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- MC #3
- Page 9
- Designer's Corner Keyboard Bit 7
- Bit 7 of the BB I keyboard does not have to be tied to ground. Can use to
- signify function key.
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- MC #3
- Page 10
- Review of FORTH Books Arne Henden
- Threaded Interpretative Languages. Invitation to FORTH. Starting FORTH.
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- MC #3
- Page 12
- Safer Formatter John Jones
- New version of disk formatter to prevent PFM from formatting drive A when
- drive B not ready. Program listing. SSSD.
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- MC #3
- Page 14
- Unica, A Set of Tools David Thompson
- Unica is described as a set of software tools in the spirit of UNIX. Unica
- includes tools for binary file compares, concatentate files, copy files, disk
- mapper, CRC identification, horizontal concatentator, link new name to a file,
- directory program, rename a file, text file comparator, set file attributes,
- spelling checker, search file for pattern, sort lines, input output
- redirection, word counter, extract words,
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- MC #3
- Page back cover
- Double Density add otto hiller
- requires 4 mhz mod.
- --
- MC #3
- Page back cover
- Unica add. Knowlogy
- add for unica. UNIX flavor programs for CP/M
- --
- MC #23
- Page 1
- Editorial
- Upcoming SOG. Some of those attending: Ezra Shapiro (BYTE), Slicer, Ampro
- Integrand, Philippe Kahn
- Trenton Computer fest to be attended. Gary Entsminger starts Last Page Column.
- Remex drives (2/3 height) concluded duds. Shugart dies. Suggestions for MC
- additions. Wanting info on surplus. Xerox 820 II no longer sold by Xerox.
- PC AT drive problems. New Mag DTACK Grounded. Gossip mag. Segmented archecture
- on Intel processors is no good for large memories. Z80000 suffers same defect.
- Excellent recommendation of Turbo Tutor for beginners learning Pascal.
- Computers and Electronics (Popular Electronics) got ziffed.
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- MC #23
- Page 2
- letter Stanley D Watson
- Kaypro 10 wini problem. Traced to low current controller board.
- Comment suggests lubricating stepper arm.
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- MC #23
- Page 2
- letter Whitney Blauvelt
- ZCHESS and ticks
- Problem with tick marks on ZCHESS. Problem is due to Kaypro monitor
- putting a tick mark for null.
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- MC #23
- Page 2
- letter Walter B. Whitcher
- Pro 8 Installation
- Problems with installing Mitsubishi disk drives in Kaypro.
- Tandon drives use 7/64 allen wrench. Mitsubishi uses 3m x 1m socket head
- cap screws. Mounting holes must be redrilled. Power connector not
- readily available. MC Plus 4 Decoder board installs poorly.
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- MC #23
- Page 2
- letter Chuck Carpenter
- Xerox 820 Info
- "Software Development Guide" published for Xerox 820. Included schematics
- and ROM listings. Etch 1 CPU not possible to directly use DS 8" drives.
- However, possible to use 8" 2 sided drives.
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- MC #23
- Page 3
- letter Richard Levine
- Fixing the SBASIC Sorts
- Problem with understanding recurrsion in SBASIC. Suggests fixes to SSORT.
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- MC #23
- Page 3
- letter Frank Mihm
- Wants to run CP/M on IBM PC. Needs coprocessor board. Editor suggests sources.
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- MC #23
- Page 3
- letter Gene Klein
- Speed-up problem
- Kaypro 2 has problem at 5 mhz.
- Editor suggests that Kaypro 2 may be Kaypro 4 board.
- May or may not have to change monitors to make speed change.
- Look at labels on monitor ROM.
- 81-149 means Kaypro 2. 81-232 means Kaypro 4 board.
- Fixes for aux chips and refresh timing.
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- MC #23
- Page 64
- letter Roger Brucker
- PX-8 Support
- Requests support for Epson Geneva PX-8 portable CP/M 80 computer.
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- MC #23
- Page 64
- letter Eric J. Torney
- RAM disk and EPROM programmer
- Microsphere RAM disk works fine.
- Having problem with EPROM Programmer.
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- MC #23
- Page 64
- letter Michael Stocker
- Recovering from bad edits
- Recovering text from crashed Wordstar or Perfect Writer. Does a memory
- save then convert hex to ascii. Program listing MBASIC included.
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- MC #23
- Page 64
- letter Philip Burke
- Software Copy Protection
- PERT and Critical Path Techniques (Lionheart Publishers) is
- copy protected. Low blow.
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- MC #23
- Page 4
- ART Clark A. Calkins
- Automatic Disk Relogging with CP/M 2.2
- Discussion of why CP/M requires relogging (CTRL-C) on disk change and
- what it does. Details mods to force CP/M to update bit map when a disk is
- changed. Changes CCP, BDOS jump table, CHECKDIR, NXENTRY, OPENIT, Disk Reset,
- added CLRLOG. Adds 36 bytes to BDOS.
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- MC #23
- Page 9
- ART Dave Hardy
- S-100 Bus
- some simple I/O circuits.
- I/O addressing.
- Decoding other than I/O.
- Line Descriptions.
- Recommends book "Interfacing to S-100 (IEEE-696) Microcomputers" and IEEE
- standard.
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- MC #23
- Page 13
- ART Sol Libes
- In the Public Domain
- Latest SIG/M releases 210 thru 217
- Language software in Public Domain. BASIC, MITS BASIC, BASIC/5, Tarbell
- BASIC, LL-BASIC, EBASIC, PASCAL, Small-'C', FOCAL, ALGOL/M, RATFOR, FORTH,
- FORTH11, SMFORTH, STOIC, LISP, ACTOR, PILOT, SAM-76, PIDGIN, META, REC, PLO
- PISTOL, TINCMP, META4, COBOL
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- MC #23
- Page 18
- ART D.L. Carlyle
- Interrupt Driven Serial Print Driver
- List device driver for the SIO channel B with interrupts added. Program
- listing. Printer wiring table. Modifying CBIOS instructions.
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- MC #23
- Page 21
- ART Mitchell Mlinar
- The Xerox Column
- Detailed manual for Xerox II is available. Address included.
- new ROM available for II (ROM 5.0)
- reviews SWP and Emerald Microware DD board for Xerox 820-I. Rates the two.
- Blanking the screen on the 820 = bit 6 system port.
- Setting up a RBBS for Xerox 820 clearing house.
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- MC #23
- Page 25
- ART Fred Scacchitti
- C'ing Clearly
- Defends TINY C. Mentions upgrades he has put on TINY C: Relocating assembler
- and linker (M80 and L80). Modified Jim Hendrix latest library (Dr Dobbs may 84)
- Program listing TIME.C. Time utility for the Xerox 820.
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- MC #23
- Page 32
- ART Laine Stump
- Slicer Column
- Article deals with 8086 assembly language. Differences between Z80 assembler
- and 8086 assembler. XLT86: a source code translator from Digital Research.
- Compares some execution times of Z80 and 8086 code.
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- MC #23
- Page 35
- ART Dr. Ralph Chatham
- The Kaypro Column: An adventure in Trouble Shooting
- Floppy disk drive problems. Problem might be 10 ohm resistor on old Kaypros
- tied to ground on pin 18 of the printer port. When R21 burns out, it pulls down
- the rest of the power supply. Solution: remove R21. Another trial involved
- removing metal bracket next to video board (per Kaypro). Problem ultimately
- solved by replacing data separator chip. "nine times out of ten that is the
- problem".
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- MC #23
- Page 41
- ART Sven Erlandsson
- The MicroSphere 256K RAM Disk
- RAM disk evaluation. Discusses problems found during hookup. Flakey RAM
- chip found.
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- MC #23
- Page 43
- ART Roger Linger
- Do It Yourself Smart Video Controller
- Full docs, software, schematics for building a Video Terminal. Video based on
- 65/9028 crt controller chip. 80 x 24. Uses 6502 processor.
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- MC #23
- Page 51
- ART Cliff Nunnery
- Inline Object Code in Turbo Pascal (CRC for BBII)
- BB II does a CRC check for monitor goodness. A Pascal program is given which
- will compute the CRC. Cal Tex does not return 2732 EPROM.
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- MC #23
- Page 52
- ART John Jones
- Pascal Procedures
- Pascal program to create a typewriter function to run printer. TYPIST
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- MC #23
- Page 58
- ART Arne Henden
- FORTHwords
- Letter from Glenn Dixon strongly advocating the language but suggesting
- changes. UNIFORTH. Some thoughts on how the language can be improved.
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- MC #23
- Page 60
- Review Gary Entsminger
- An Inspired Turbo Tutor
- Frank Borland lives in mountains and wrote Turbo Tutor. Highly recommended
- as learning tool for Pascal.
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- MC #23
- Page 63
- ART David Hawkins
- New Strokes for KSTROKES: Novice Programming
- Method of modifying the key definitions stored in KSTROKES. ASM programming.
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- MC #23
- Page 63
- ART Christian Phaneuf
- A Low Cost EPROM Eraser
- How to build a low cost EPROM eraser. Uses a "tin" can and UV lamp.
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- MC #23
- Page 65
- ART Luis Basto
- Pascal and 'C' compilers Benchmarked
- Benchmarks compilers Turbo Pascal, Pascal Z V4.0, C/80 V3.0, and Aztec C V2.0.
- Likes Turbo Pascal best.
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- MC #23
- Page 67
- ART Tom Geldner
- Running in CP/M's TPA
- Explains memory map for CP/M. Uses SBASIC to determine TPA room. Dynamic
- array sizing with SBASIC.
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- MC #23
- Page 72
- ART David Thompson
- On Your Own
- Discusses history of RP/M (Bob Cameron). Bob runs a sawmill. Wrote CP/M
- Revealed. Working on a FOCAL interpreter for IBM PC.
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- MC #23
- Page 74
- Tech Tips Bob Ghormley
- Anchor Signalman Mark XII Fix
- Use a .001 mfd capacitor from each side of the phone line to ground to
- RFI noise. Use 1000v caps. Don't use .01 mfd, they cause hum.
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- MC #23
- Page 74
- Tech Tips Richard Bugg
- Improving a Kaypro EPROM Programmer
- Technique for improved powering up and down sequencing using a dpdt switch.
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- MC #23
- Page 74
- Tech Tips Anthony Gasbarre
- Xerox 820 mods and problems
- Too much horizontal drive may cause vertical line on Motorola DS-3000. Solution
- is to put 2K pot between horiz and ground. Mod to drive mod in MC #19. Cut foil
- rather than bending out pin 23 of controller.
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- MC #23
- Page 74
- Tech Tips Hal Vikks
- Adventure Words
- Tells how to find the words recognized by ADVENTURE.
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- MC #23
- Page 74
- Tech Tips D.L. Hedin
- Modifying an 820-I to use a BBI Monitor
- Details how to add BBI monitor to Xerox 820. Actually not as hard as article
- suggests.
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- MC #23
- Page 75
- Tech Tips Kent Mason
- Kaypro Cursor Mods: The assembly language Version
- Kill cursor blink on Kaypro 2, 4 and 10. ASM listing
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- MC #23
- Page 75
- Tech Tips Bill Tucker
- Kaypro Cursor Mods: The Turbo Version
- Quickey describes port and setting to change cursor on Kaypro 4-84. Turbo
- listing.
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- MC #23
- Page 81
- Humor Phil Emery (sic)
- Ready to use files.
- Nuf said.
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- MC #23
- Page 82
- Culture Laine Stump
- Confusing at Catastrophy Manor
- Parody of typical Jerry Pournelle article in Byte. Lovely!
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- MC #23
- Page 83
- ART Gary Entsminger
- Tidbits
- Geneva PX-8 gets to distribute Bourland products. Surplus Kaypro parts (Sabet).
- Xerox Manufacturing Outlet selling surplus Xerox 820's. Z System (Echelon,Inc).
- availability. MSX arriving from Japan. Lists several manufacturers.
- ACNAP2 Electronic Circuit Analysis Program description and vendor address.
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- MC #23
- Page 84
- Review Gary Entsminger
- The Epson PX-8, CP/M in your lap
- Review of the Epson PX-8 lap computer. Subset for CP/M in ROM. 8 x 80 display.
- Comes with Wordstar. Docs not well organized. LCD display is not too good.
- Recommended as portable system.
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- MC #23
- Page 88
- ART Gary Entsminger
- The Last Page
- Call for discussion on computers other than CP/M. Atari 68000 system mentioned.
- Books on Assembler language for 8088. Soul of CP/M mentioned. Where is
- Z800 from Zilog. Requests letters or papers on most everything.
-
-
- bler language fo