Micro_Cornucopia_04_Feb82.pdf

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TABLE OF CONTENTS

More PFM-80 ......................................... .- ..... 5

The First 16 Bytes ........................................... 5

Translating Your Keyboard

Listing .......................... 6

Simple Keyboard Encoder ................................... 8

4 MHz (More and Less) ...................................... 9

XM-80 (Extended Macro 80) ................................. 10

Undoing the Fatal Erase .................................... 10

Bringing Up a Reluctant Big Board ........................... 16

On Modems, SIOs, and Lync ................................ 17

REGULAR FEATURES

Letters ....................... 2

Big Board Notes .............. 4

Designer's Corner ............. 9

FORTHwords ............... 12

3 FORTH Reviews ........... 13

NEW PRICES EFFECTIVE ON THE 1ST DAY OF THE COVER MONTH OF THIS MAGAZINE

"THE BIG BOARD"

OEM - INDUSTRIAL - BUSINESS - SCIENTIFIC

INGLE BOARD COM'PUTER KIT!

Z-80 CPU!

64K RAM!

•

!!I

::D

-t

THE BIG BOARD PROJECT: Three years In the works, and maybe too good to be true. A tribute to hard headed,

no compromise, high performance, American engineering! The Big Board gives you all the most needed

computing features on one board at a very reasonable cost. The Big Board was designed from scratch to run the

latest version of CP/M*. Just imagine all the off-the-shelf software that can be run on the Big Board without any

modifications needed! Take a Big Board, add a couple of 8 inch disc drives, power supply, an enclosure, C.R.T.,

and you have a total Business System for about 1/3 the cost you might expect to pay.

(64K KIT

BASIC I/O)

SIZE: 8'" x

13'1,

IN.

SAME AS AN 8 IN. DRIVE.

REQUIRES:

~5V

3 AMPS

+ -

12V

.5 AMPS.

::D

,...

FULLY SOCKETED!

FEATURES: (Remember, all this on one board!)

64K RAM

,...

-t

::D

80 CHARACTER VIDEO

With a crisp, flicker-free display that looks extremely sharp even on small

monitors. Hardware scroll and full cursor control. Composite video or split video

and sync. Character set is supplied on a 2716 style ROM, making customl;!ed

fonts easy. Sync pulses can be any desired length or polarity. Video may be

inverted or true. 5

7 Matrix - Upper

Lower Case

Uses Industry standard 4116 RAM'S. AII64K is available to the user, our VIDEO

and EPROM sections do not make holes in system RAM. Also, very special care

was taken In the RAM array PC layout to eliminate potential noise and glitches.

Z-80 CPU

Running at 2.5 MHZ. Handles all 4116 RAM refresh and supports Mode 2

INTERUPTS. Fully buffered and runs 8080 software.

::D

FLOPPY DISC CONTROLLER

Uses WDl77l controller chip with a TTL Data Separator for enhanced

reliability. IBM 3740 compatible. Supports up to four 81nch disc drives. Directly

compatible with standard Shugart drives such as the SA800 or SA80l. Drives can

be configured for remote AC off-on. Runs CP/M" 2.2.

SERIAL I/O (OPTIONAL)

Full 2 channels using the Z80 510 and the SMC8116 Baud Rate Generator. FULL

RS232! For synchronous or asynchronous communication. In synchronous

mode, the clocks can be transmitted or received by a modem. Both channels can

be set up for either data-communication or data-terminals. Supports mode 21nl.

Price for all parts and connectors: $49

TWO PORT PARALLEL I/O (OPTIONAL)

Uses Z-80 PIO. Full 16 bits, fully buffered, bl-dlrectional. User selectable hand

shake polarity. Set of all parts and connectors for parallel I/O: $19.95

BASIC I/O

Consists of a separate parallel port (Z80 PIO) for use with an ASCII encoded

keyboard for Input. Output would be on the 80 x 24 Video Display.

REAL TIME CLOCK (OPTIONAL)

Uses Z-80 CTC. Can be configured as a Counter on Real Time Clock. Set

all

parts: $9.95

BLANK PC BOARD -

$149

CP/M* 2.2 FOR BIG BOARD

The popular CP/M" D.O.S. to run on Big Board Is

available for $159.00.

The blank Big Board PC Board comes complete with full documentation

(including schematics), the character ROM, the PFM 3.3 MONITOR ROM,

and a diskette with the source of our BIOS, BOOT, and PFM 3.3 MONITOR.

PFM 3.3

2K SYSTEM MONITOR

PRICE CUT!

The real power of the Big Board lies In Its PFM 3.3 on board monitor. PFM commands include: Dump Memory, Boot CP/M*, Copy, Examine, Fill Memory, Test Memory, Go To,

Read and Write I/O Ports, Disc Read (Drive, Track, Sector), and Search. PFM occupies one of the four 2716 EPROM locations provided.

Z-80 is a Trademark of Zilog.

Digital Research Computers

(OF TEXAS)

P.O. BOX 401565 • GARLAND, TEXAS 75040 • (214) 271-3538

*TRADEMARK OF DIGITAL RESEARCH.

TERMS: Shipments will be made approximately 3 to 6 weeks after we

receive your order, VISA, MC, cash accepted. We will accept COD's (for the

Big Board only) with a $75 deposit. Balance UPS COD. Add $4.00 shipping.

USA AND CANADA ONLY

NOT ASSOCIATED WITH DIGITAL RESEARCH OF CALIFORNIA, THE ORIGINATORS OF CPM SOFTWARE

**1 TO 4 PIECE DOMESTIC USA PRICE.

MICRO CORNUCOPIA

11740 N.W. West Road

Portland, Oregon 97229

503-645-3253

II~ID ~DI.U~D'II

Feb. 1982

The Journal of the Big Board Users

No.4

Editor

Publisher

David J. Thompson

Technical Editor

Ruth Fredine-Burt

Graphic Design

Sandra Thompson

Typography

Patti Morris

Martin White

Irish Setter

Cover Illustration

Gerald Torrey

Can't Leave

Well Enough Alone

Two Exclusives!

Just when things seem to be settling down to a dull

roar someone decides things are just too quiet and

they light off a firecracker. Actually, the way news has

been breaking around here it sounds like someone is

celebrating an early July 4th.

First, I found out that Russell Smith and Jim Fergu-

son are coming out with a whole new Z80-based single

board computer with such goodies as graphics, DMA,

STD bus interface, double density, up to 5 MHz, and

64 K RAM chips. Because of the STD bus interface, the

RAM is expandable. They are planning to supply it in

kit form, as a finished board, and as a complete sys-

tem. More information on this as it's available.

Second, Jim Tanner is reducing the price of the basic

Big Board package from $650 to $499 on February 1, th.e

publication date of this issue. You can say you saw It

first right here in the pages of Micro C.

FORTH in ROM

Quite a number of folks have written asking when

FORTH in ROM would be available. Well, it's availa-

ble now.

is FIG FORTH complete with disk I/O cus-

tomized for the Big Board. Now you can run FORTH

even

you don't yet have CP/M, or even a disk drive.

The price is $65.00 for the three

~hip

set

~nd

docum.en-

tation. We also have the disk edItor avaIlable (on dIsk)

for $15.00. Again, no CP/M is required.

Other ROMs are also available.

you need a new

character ROM but don't want to part with your

present one, or

you need a faster monitor ROM to

run 4 MHz, I will burn it for you. (See the Micro Cad.)

you want a copy of the monitor ROM, please either

send me the old one to copy or send the serial number

of your board. I wouldn't feel right making copies of

the monitor for folks who don't have Big Boards.

Other Products

We are -contacting the manufacturers of the prod-

ucts we review (products that look particularly good)

about making the items available through Micro C at a

discount. Check the Micro C ad each issue for informa-

tion on what's available.

you are using something

fantastic that we haven't mentioned in the magazine,

holler!

MICRO CORNUCOPIA is pub-

lished six times a year by Micro Cor-

nucopia of Oregon, 11740 N.W.

West Road, Portland, Oregon

97229.

SUBSCRIPTION RATES:

1 yr. (6 issues)

1 yr. (Canada

Mexico)

1 yr. (other foreign)

$16.00

$20.00

$26.00

All subscription orders payable in

United States funds only, please.

ADVERTISING RATES: Available

on request.

CHANGE OF ADDRESS:Please

send old label and new address.

SOFTWARE, HARDWARE, AND

BOOK VENDORS: Micro Cornu-

copia is establishing a group of

viewers. We would very much lIke

to review your Big Board compatible

products for Micro

Please send

material to Review Editor, Micro

Cornucopia.

WRITER'S GUIDELINES: All

items should be typed, double-

spaced on white paper or better yet,

on disk. (Your disk will be returned

promptly.) Payment is in contribu-

tor's copies.

LETTERS TO THE EDITOR: Please

sound off.

is a trademark of Digital Research, Inc.

Micro Cornucopia.

Extra! Extra!

Read All Abou tIt!

(continued on page 19)

Letters

Dear Editor,

Please send user's disk #1, and

advertising rates. I have 5, 10, and 20

M hard disks available for the Big

Board. The price is $2825 for 5 Meg,

$3945 for 10 Meg, and 4715 for 20

Meg. Expect delivery in February.

Jim Thompson

41 King St.

Redwood City, CA 94062

lower. I suspect that the stash sub-

routine at F333H is changing the lock

byte at FF33H or the flag byte at

FF34H. How about it?

Finally, how do you load a CBIOS

and CP/M without making calls into

the monitor. Then how do you re-

cover when reset time comes. Oops,

lost the CBIOS and back into the

PFM monitor.

Keep up the good work on the

magazine.

Larry Blazek

3210 Echo Rd

Sapulpa, Ok 74066

Dear Editor,

I want to set up my Big Board as a

lightweight terminal for accessing

my employer's scientific computer.

Dragging a TI Silent 700 through air-

ports has made my right arm 2"

longer than the left.

I have a Sanyo 9" monitor that

would fit into my briefcase along

with the Big Board and power sup-

ply. So the Big Board seems like a

good way to go but since I wouldn't

have disk drives I would need the

terminal software in ROM.

Basically the software I need

would do minimal word processing

and dumb terminal emulation so I

could create text and move it to and

from the main computer.

Is anyone interested in doing it? I

have very little loose money but I'll

bet we could work out a very profit-

able trade.

Thomas Mason

Professional Engineer

2402·Audubon Rd

Akron, OH 44320

Editor's note:

The monitor ROM is probably just

barely making it when it is cool and as it

warms up, it slows down. Try using a

2716-1 for the monitor. Fast monitor

ROMs are available from Micro

for the other questions, what say any-

one?

Dear Editor,

I thoroughly enjoy your maga-

zine. The Direct Input Routine on

page 7 of issue #2 can be done more

easily in Microsoft Basic version 5.1

or higher.

10 L$=INKEY$

20 IF L$

< >" "

THEN [DO SOMETHING]

ELSE [DO SOMETHING ELSE]

INKEY$ does not hang up the pro-

gram if there is no input.

Dr. Sandy Warshaw

Laurence Livermore Lab

PO Box 808 1-461

Livermore, CA 94550

Dear Editor,

A thousand thanks for your

prompt reply with issue #3 of Micro

C. I was quite overwhelmed with ex-

citement (not a lot happens on a

Thursday in Nunawading, Austral-

ia). Imagine finding out that there

are others doing the same things I

am and having the same hassles.

From your brief description of the

first 2 issues, it appears that they

cover most of the problems I've just

fought my way through and one I've

just started to work on. My MX-100

printer arrived on Wednesday (you

can imagine how I was on Wednes-

day) but I am already tired of just

looking at it in admiration and run-

ning the self test. So I have decided

to actually connect it to the Big

Board.

Congratulations on a first class

publication both technically and

philosophically.

Do you have many Australian

members? I know that at least 300 to

600 Big Boards have been sold here.

you are interested in further expo-

sure here I would be happy to dis-

tribute any sample issues and pro-

motional material to the local CP/M

and microcomputer user groups.

Articles I'd like to see include a

terminal program in ROM and an

Epson plotting package.

Michael Staindl

63 Mt Pleasant Rd

Nunawading, Australia 3131

Dear Editor,

Four MHz has been a problem.

After making the mods the board

runs until I hit reset. Then the proc-

essor goes into the weeds and I can't

recover unless I power down. Why?

What's the fix? I use 150 ns RAM and

Z80Aparts.

Also, my keyboard entries ran-

domly change from upper case to

Editor's note:

Another tip for Microsoft users (this

one undocumented). To use random ac-

cess records larger than

128

bytes each,

you have to call the Basic program as fol-

lows:

MBASIC FILENAME /S:(BYTES/

RECORD)

Editor's note:

Thank you for the comments Mike.

We will be sending you some materiaL

about Micro

that you can pass around.

We have only a couple of subscribers in

Australia and we would really like to

reach those who don't know about us.

We'd also like to reach all those other

folks in the US, Canada, etc. who either

don't know about us

just haven't

bothered to get a copy of the magazine to

see what the group is doing. If any of you

know of such a person

group, let us

know and we will make sure they at least

hear about the Big Board User's group.

(In other words, rat on you friends, it's

for their own good.)

•••

Micro Cornucopia, Number 4, February 1982

ANNOUNCING

THE BIG BOARD ADD--ON

••••

FEATURES

••••

Program

2708, 2716, 2732,

and

2764

type EPROMS. With foul" programming

sockets you can program lots of memory-at once. Programs EPROMS sequentially

or in parallel for small production runs.

Second bank (64K) of memory will allow fast screen swaps, larger EPROM

program storage, etc. Memory is fully-static 6116 CMOS type RAMS which will

allow RAMIEPROM intermixing. Battery back-up for CMOS RAM.

More goodies. Sixteen channels of both 8-bi t

AID

and

A conversion.

Connect any of the FCC approved modems by NOVATION directly into the board.

Plus, there's an S-100 connector which will allow you to connect an S-100

card directly or interface with an S-100 motherboard.

And speaking of

features, voice output with the on-board VOTRAX phoneme generator chip.

All this plus: four serial channels, four parallel ports, everything

socketed, and it runs at 4 MHz. (In fact, with all this, you may just forget

about the Big Board altogether!)

This is the board you

the serious builder and

board, full kit, partial

same dimensions as the

Available

3/20/82.

have been waiting :for. This board is intended for

the novice alike.

It will be available in bare

kits, and assembled and tested. The board has the

BIG BOARD so it piggy-backs into the same space.

Bare board •••••••••••••••••••••••••••••••••••••••••••••••••

99.00

Complete package •••••••••••••••••••••••••••••••••••••••••••

CALL

••••

OTHER BIG BOARD ACCESSORIES

••••

Big Board power supply kit (BB

2 DRIVES

+ ) ••••••••••••••

$ 85.00

Big Board power supply A&T ••••••••••••••••••••••••••••••••• 135.00

C.ITOH 8510 9xN matrix, graphics, 5 char sets printer (ser.) 645.00

C.ITOH 8510 same as above but par. interface •••••••••••••••• 595.00

4Mhz mod that WORKS •••• $7.50

BIG BOARD PARTS.............

CALL

E.C.R.L.,INC.

P.O. BOX 387

CANBY,

OREGON

97013-0387

503-266-4982 ·24 HRS.

503-656-3382

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