The most important question is: How to I connect a disk drive to this thing?
It does have two 72-pin connectors, one labeled "System Bus" which is male,
and another that is hidden behind a plastic cover and is female.
What is the pinout of the RS232 and Printer ports?
What is the pinout of the RGB and tape ports?
And lastly: What is the syntax for the unusual commands that come up when
I hit the function keys? (SOUND DEF, SOUND TEMPO, SOUND, DRAW CIRCLE, etc.)
I used a generic (Microcom) Apple ][+ clone in the mid 80's, but never
followed it after that, and never played with anything newer than a //e. Are
the ports the same as those on a IIc? Does the IIc have this (what seems to
be) 3-voice sound chip with noise generator?
Any info would be appreciated. The Laser 3000 seems to be very well built,
with an excellent keyboard, and I'm itching to make it useful.
Doug Spence
DS_...@pavo.concordia.ca
So I presume this means that there is no such thing as an external
floppy controller for the Laser 128 that would be compatible with
the Laser 3000? I've never seen what any other Laser system looks
like - I guess I was just lucky to get the weird one. :)
> "What is the syntax for the unusual commands that come
> up when I hit the function keys? (SOUND DEF, SOUND TEMPO,
> SOUND, DRAW CIRCLE, etc.)"
>
>As I recall from an ad for the L3000, the BASIC was a standard
>Microsoft varient, rather than Applesoft compatible. Except for the
>sound commands, I suspect a manual on GW-BASIC for a PC would get
>you on your way.
Well, the startup message is:
MICROSOFT BASIC V.T. VERSION 2.2
(C) COPYRIGHT V.T. 1984
but it is basically Applesoft BASIC. The only differences I've found
so far, are the additional high resolution graphics and sound commands,
and the lack of low-res graphics commands. Also, I'm not sure if real
Apples use the WIDTH command to switch between 40/80 columns?
I did look up some commands in my AmigaBASIC manual, though, and
managed to figure out a few of the new commands:
DRAW HCIRCLE (x,y),radius[,aspect]
DRAW SCIRCLE (x,y),radius[,aspect]
DRAW HSQUARE (x1,y1 TO x2,y2)
DRAW SSQUARE (x1,y1 TO x2,y2)
SOUND frequency,duration,voice[,volume]
(1-64) (1-255) (1-3) (1-15)
NOISE voice?,duration,volume,frequency?
(1-2) (1-4)
I haven't figured out the PAINT command yet, nor SOUND DEF, SOUND TEMPO,
or all the arguments to the TEXT command (it sets border colours and
some other things).
I know, too, that the sound chip will play from all voices at once (else
there'd be no point in having them) and have been able to make it do so.
Until I actually specify VOLUME. After that, I'm stuck. The machine
simply waits until one note is complete before it continues execution.
Without ever specifying a volume for anything, it doesn't pay attention
to duration... BASIC waits for that length of time, but the note continues
to play afterward until the frequency played through that voice is
changed. I wonder if I can figure this out without a manual. :/
And 64 frequencies is rather limiting. Is this a limit of the BASIC, or
of the chip, I wonder?
> "Are the ports the same as those on a IIc? Does the IIc have
> this (what seems to be) 3-voice sound chip with noise generator?"
>
>Having never seen a Laser 3000 in the flesh (only in ads), I cannot
>say. The serial port on the IIc was either a DB-9 or a mini-din 8.
>The drive port was a DB-19.
Unfortunately, the Printer, RS232, and System Bus ports are all edge
connectors, like you find on the back of a PET. The Printer port has
20 pins (10/side), the System Bus has 72 pins, and the RS232 port has
30. The hidden port on the side is like the System Bus, only female.
And all other ports use DIN connectors. Luckily I can use the same
cable for COMP. VIDEO as I do with my VIC-20. :)
>None of the Apple II series had the same sound chip as in the Laser
>3000. The same chip was found in a number of other 8-bit machines,
>however, and I believe on one or more sound cards for the II+ and IIe.
Which sound chip is it, and what other 8-bit machines had it?
What does the ad you've seen say about the L3000? I presume you still
have the ad, or have a fantastic memory? :)
>I wish I could run across a Laser 3000 in good condition at a decent
>price. I wouldn't mind adding it to my collection of "Never heard
>of it" machines. <grin>
Well, you'd probably kill me if I told you where I found this, and how
much I payed for it. How's the C65 doing? ;)
Doug Spence
DS_...@pavo.concordia.ca
>The problem is, I assume you don't have any of the pinouts (as few
>computers come with manuals that have full tech specs...assuming you
>even have the Laser 3000 manuals).
Nope, I don't have any manuals at all. In fact, I got nothing but the
computer itself. Luckily it has an internal power supply, that takes a
normal power cord, else I might not even know yet that the machine
works. :)
>You might want to try contacting Video Technology. If they are nice folk,
>they might be able to get them to send you some info on the L3000. You
>never know until you try. I once got a photocopy of a manual for a printer
>buffer from a company that had been out of business for years! (Long story,
>but to make it short, I actually ended up talking to a "sister" company
>that was in an entirely different field).
Do you (or anyone else) know how to get in touch with V.T.? All I know is
that the machine was made in Hong Kong. :)
>The printer port should be the easiest to puzzle out. Using a multimeter,
>while sending a continous stream of CHR$255 to the printer, you should
>be able to find the which pins are active and which are ground. (Hmmm...
>but if no printer is properly attached to the ACK line, it would stop
>after the first character...so much for that bright idea).
I'm not as interested in the printer port as in the RS232 and disk drive
ports. I want to get software in and out. I was actually thinking of
using the L3000 for an old-style BBS, but considering the problem with
parts I guess that would be a very bad idea. :)
>I wonder if there is more than meets the eye on that RS-232 port. Even
>if one half of those pins are ground, 15 pins more than is necessary for
>RS-232.
Maybe the top 15 pins and bottom 15 pins are identical? (Wild hypothesis)
> "Which sound chip is it, and what other 8-bit machines
> had it?"
>
>If I recall correctly, it is the AY-3-8910 (or something like that).
>The chip, or a compatible version, was used in the TI-99/4A, MSX machines,
>the Atari ST series, the Coleco Adam, and some other, rarer machines
>you may not have heard of, such as the Timex-Sinclair 2068, Memotech MTX-512,
>and Spectravideo SV-328 (and SV-318).
Cool! I guess I'll have to figure out how to bang at it in hardware, as
the BASIC seems not to want to reveal its secrets.
>Uh-oh. Let me guess: Something like either a yard sale or a Salvation Army
>thrift shop, and cost, around $10-$15. How close am I? If it was "worse"
>than that (i.e., sitting with someone's trash for pickup, and therefore,
>free), I don't even want to know. <grin>
You are right on the mark. Salvation Army thrift shop, for $10 Canadian.
That's the most I've payed for a machine from there, but it has also proven
to be by far the most interesting.
> "How's the C65 doing? ;)"
>
>Doing well. Too bad things have been so busy I have not even had time to
>turn it on in the past couple of months. (In fact, about all I have had
>time to do on any of my computers recently is to try an keep up with
>messages on the nets. Frankly, I think anyone who comes up with a way of
>selling "free time" will be a billionaire a day after they put it on the
>market! <grin>
Yeah. And then some of us have too much free time. That's why we go to
the Salvation Army to pick up new toys. ;)
>Against the odds, I was successful in finding an ad for the Laser 3000
>in a quick search while still logged on. Specifically, on page 94 of the
>December 1985 issue of COMPUTE!. The company selling it was Computer
>Direct (aka Protecto). Price then was $499, but that included the disk
>drive, and Magic Window, Memory and Calc programs (wordprocessor, database,
>and spreadsheet).
Sheesh... sounds like a good deal. :) If it was available a couple of
years earlier at that price, I would've been better off buying a Laser 3000
than the Microcom ][+.
>The ad also shows a pic from the back, and lists the ports. You may find
>this interesting.
>
>Looking at the back of the computer, and starting on the left side:
>
> (1) Joystick port
> (2) CP/M cartridge port
^^^^
And I had this pegged as a likely disk drive port. Oh well. :)
> (3) Printer interface
> (4) Disk drive controller interface
> (5) RS-232 port
> (6) Sound volume
> (7) Cassette interface
> (8) composite video
> (9) RGB output
\
9.5 |- There's a "color defeat" switch here. Quite useful.
/
>(10) Reset
>(11) Power cord (unlabeled in the ad)
>(12) Power switch
>
>Features mentioned:
>
> 192K RAM, 32KB enhanced Microsoft BASIC, 80 column text, 560 x 192 color
> graphics, 81 key sculptured keyboard, high efficiency switching power
> supply, Centronics bus printer interface, cassette interface, 4 channel
> sound generator. (Hmmm..I would swear it was only 3).
The fourth "voice" is noise.
I had no idea it had 192K, BTW. But I guess it's bank switched, as the ROM
also must be. Any idea how to access either? I'd like to verify that the
RAM is actually there, and I'd like to PEEK through the ROMs to find commands
etc.
> It went on to list the graphics modes, but those appear to be Apple II
> standard.
Nope, they're not all standard. HGR5 and HGR6 have more, and different,
colours from standard Apple II modes. And text can be in colour as well:
TEXT RED,YELLOW,CYAN
for exaple gives red text on yellow background, with cyan screen border.
There are no low-res graphics modes.
>I hope this has been of some additional help
Yes, it certainly has been. Thanks for the info!
Doug Spence
DS_...@pavo.concordia.ca
OOOoooohhh! Now I remember that machine! I was *this* close to buying
one of those. I had a Franklin 2200 at the time, and although it
was pretty much superior to all my friend's IIe's, the sound and CP/M
and RAM capabilities was making me drool. Shame about Computer Direct
(aka Protecto). They used to throw Apple II catalogs around every few
weeks, and then all of sudden they went PC and now they're ??????
I just checked my BBS list and I must have purged their name a long
time ago. From last memory, Protecto/COmputer Direct BBS was in
Illinois and had a strong Christian bent. Might want to search along
those lines to see if they are still around.
On another note, did anyone remember when the first Laser 128's
were being reviewed? There was some mention of them being able to
display something like 560x240 in DHR mode. I never saw anything
else about it, though.
I went visting the very same Salvation Army thrift shop Doug
found the Laser 3000 in, unfortunately there were no Apple IIs (or
clones) to be found. I spoke with someone who worked there and apparently
they do get Apple II CPUs, on almost a weekly basis, but they're bought up
very quickly! It's not surprising, unlike other old computers, the Apple II
is expandable, user-friendly and has a vast number of educational and other
types of software written for it. As if to back this up, there were dozens
of TI99/4a's, Adams, TRS80s, Atari 400/800s, VIC20s and others stacked on
shelves. Machines that never stood the test of time as well as the Apple II
has. Hmmm, I'll admit their pricing can be a bit off, one of the TI99/4a's
I picked up to examine had a $50 sticker on it! :P
>It sounds like when it comes to acquiring old computers, I would come
>out better by paying you 2x the price you pay + shipping! <grin>
It doesn't hurt to keep your eyes open for people who throw
Apple IIs out in the trash! I've found two perfectly working Apple IIe's
in the trash, one even had a ProFile hardrive and DuoDisk 5.25. Another
had a 64k buffered Grappler+, Velcom 64k printer card, Monitor ///, Disk ][
and other goodies. Exteremly wasteful, but and even better deal than what
any thrift shop can offer -- it's free! (once you've cleaned it up a bit :)
Many people will offen just give away their old computers as well.
Such is the case with the Apple III, Apple ][ and Apple ][ Plus I acquired
not too long ago.
Mitchell Spector
m_s...@pavo.concordia.ca / spe...@vax2.concordia.ca
> "Maybe the top 15 pins and bottom 15 pins are identical?"
>
>It is possibly the RS-232 on the Laser 3000 is set up that way, as
>Commodore's edge connector for their datasette used that method. However,
That's what I was thinking of when I wrote that. :)
>most edge connectors I have seen that have enough pins on one side for
>the active signals put ground on the other side, so that if a flat ribbon
>cable is used, every other line is ground, cutting interference and
>crosstalk.
>
>That said, such a design make make sense for a parrallel or disk drive
>cable, but not for serial.
Well, I don't think there is a full side of ground pins. Some of the other
connectors do have pins that are merged together, that I assume to be ground,
but the "RS232" connector has 30 fully separated pins.
However, I now find that I am free to open this L3000. It died a few nights
ago and I was forced to break the warrantee seal in order to fix it. Turned
out to be a bad solder joint. A wire coming from the power socket had come
loose. :/ I almost died when it blinked out, though.
>I wish our local Salvation Army thrift shops would put more "thrift" in
>their computer prices. As an example, I dropped by the main one here in
>Little Rock today. They wanted $40 for an old NEC PC-6001A, which had
>no disk drive, only the cassette cable, and no box or manual. They also
>had a "kids learning computer" of some type made by our old friend
>Video Technology that they wanted $25 for.
Well, at this Salvation Army thrift shop, it's hard to find anything of that
sort at all. Anything Apple compatible is gone before you even know it was
there. Same goes with anything made by Commodore, excepting the Vic-20,
and anything that has integrated monitors or disk drives. Basically, if it
isn't a CoCo 1 or 2, a TI-99/4A, or one of a couple of models of Atari 8-bit
system, you're out of luck. Even the VIC-20s generally have a short stay.
All machines are almost immediately stripped of any cabling, power supplies,
or peripherals as well, and it is VERY rare to find a manual for anything.
Cartridges appear occasionally, though.
I guess the Laser 3000 had people confused enough that I was able to get it.
As for pricing, I'll give you a rundown of the prices I've payed at the SA
here in Montreal:
Atari 800XL: $3
Coco 1: $5
Coco 2: $5
Vic-20 (with French manual): $5
TI-99/4A (with PS, cassette cable, RF Modulator, tape manual, half of box): $8
Laser 3000: $10
5 Vic-20 cartridges: $5
Basically, I think they base prices on how complete a system is, what quality
it seems to be to the uninitiated eye, how they feel that day, how I'm
dressed, etc. :) (When I bought the L3000, I had just had a haircut that day)
I always get the feeling that someone actually purposefully strips all
valuable stuff from them. In fact, there's a store in Montreal that sells
C64 power supplies for $20, 2-prong Vic supplies for $10... Hummm...
They don't price the units at this SA until you get to the cash (though a
few machines have prices on them - usually very high).
>It sounds like when it comes to acquiring old computers, I would come
>out better by paying you 2x the price you pay + shipping! <grin>
You probably already have all the computers that can normally be found in
this shop. Or do you want a few dozen TI-99's? :)
> "I had no idea it had 192K, BTW. But I guess it's bank
> switched, as the ROM also must be. Any idea how to access
> either?"
>
>The second 64K might be accessed in the same manner as on an Apple IIe.
>However, even if so, I have no idea how the third 64K would be accessed.
>It could also be banked into the main 64K address space in small memory
>segments, like the aftermarket mods to put 256K or more in 8-bit Ataris,
>and Atari's own 130XE.
Well, I don't know how to access the second 64K in an Apple IIe. I always
just had a II+ clone. I guess I'll have to snoop around in some Apple
programming manuals, if the university still has any. :)
Doug Spence
DS_...@pavo.concordia.ca
For U.S.A. only:
LASER COMPUTER, INC.
550 E. Main St., Lake Zurich, IL 60047 U.S.A.
Phone: (312) 540-8086
Fax: (312) 540-8335
Telex: (910) 250-8589
the .sigLESSwonder,
dc0...@swt.edu
ps: DHR 560Hx192V,16Colors
GREAT! A thousand thank-yous. Now to find out if this company considers
Canada to be part of the U.S. ;)
>the .sigLESSwonder,
>dc0...@swt.edu
Doug Spence
DS_...@pavo.concordia.ca
| here in Montreal:
|
| Atari 800XL: $3
| Coco 1: $5
| Coco 2: $5
| Vic-20 (with French manual): $5
| TI-99/4A (with PS, cassette cable, RF Modulator, tape manual, half of box): $
| Laser 3000: $10
| 5 Vic-20 cartridges: $5
i'd grab the Vic and the cartridges. play video games for a while,
then strip it for parts. OMEGA RACE will always be better than Duck
Hunt.
--- email: uwvax!gorgon!ruth!spqr
You say an Apple II is slow? Gee, mine runs about on par with several
'286s I've seen.... oh yes, I have a command line after 4 seconds, too.