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Topic 4 Tue Jan 13, 1987
TIGLON.G [*SysOp*] at 21:20 EST
Sub: The 1571 Disk Drive
A companion drive to the C=128 computer, the 1571 is a marvel!
4 message(s) total.
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Category 17, Topic 4
Message 1 Tue Jan 13, 1987
TIGLON.G [*SysOp*] at 21:24 EST
The 1571 disk drive sported a new style and color to match the C=128 machine.
Since its release, a lot of information has passed through our message base.
You will find the messages have been archived and placed in Software Library
#1 for easier access:
3150 1541/1571 COMPATIBILITY
1240 1571 SECOND SIDE SECRET
2433 2 DRIVE 1571.INFO
Feel free to continue any discussion in this new topic devoted strictly to
this drive!
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Category 17, Topic 4
Message 2 Wed Jan 14, 1987
TIGLON.G [*SysOp*] at 02:56 EST
See also files:
3158 1571 COMPATIBILITY #2
3160 1571 ROM UPDATE ARCHIVE
3161 TWO DRIVE OPS/1571
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Category 17, Topic 4
Message 3 Sun Jan 18, 1987
KEVIN-S. [KeS] at 10:48 PST
I had a certain amount of success in dealing with the large Digital Solutions
demo files with my single 1571. To avoid the problem of files crossing from
side one to side two, I downloaded the demo (500+ blocks) onto a freshly
formatted disk, then copied a "junk" text file onto that disk, of sufficient
size to just cross onto the second side of the disk. THEN I used Greg
Pfountz' Library 1.3A to de-lib the demo. Since each file was being written to
the second side, I had no problems with the resulting dissolved demo! Also,
Library 1.3A doesn't have the delayed access when dealing with the second side
of a disk... another kudo for Mr. Pfountz!
KeS
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Category 17, Topic 4
Message 4 Sun Jan 18, 1987
DEB [*SysOp*] at 16:03 EST
KeS: the troubles with the 1571 trashing disks are not neccesarily with
files which span two sides...under certain conditions, using the second side
for ANY writing at all can screw up otherwise good files.
How...?
Well...it seems that sometimes dealing with the second side needs a little
more room in RAM to work...and the DOS steals the RAM from the BAM's
buffer...when it finishes writing and closing the file, it updates the BAM
from the buffered information and *blooooey* you have a screwed up disk.
**
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Topic 20 Fri Feb 13, 1987
L.BURNS [Larry] at 19:54 CST
Sub: BURST Mode On The 1571
This topic should be used for problems, general questions and answers for the
'burst' mode of the 1571 drive.
6 message(s) total.
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Category 17, Topic 20
Message 1 Fri Feb 13, 1987
L.BURNS [Larry] at 19:57 CST
Does anyone know of a good source for info on programming the burst mode in
the 1571? It would be ideal if the source is easy to understand and
informative, but any sources are better than none!
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Category 17, Topic 20
Message 2 Sat Feb 14, 1987
MICHAEL.M [-:SysOp:-] at 00:05 EST
Larry -
A couple of books have sections dealing with Burst Mode in the 1571:
Commodore 128 Programming Secrets (McGraw/Hill) gives a table of all the
burst mode commands, and also covers the basics of the subject. It does not
show how to use the syntaxes, but gives a type-in source listing for a routine
using some of them.
The most comprehensive publication concerning the 1571 would probably be the
book by Abacus: 1571 Internals. It may or may not be easy to understand,
depending on your experience, but it is considered an essential tool for
getting the most out of your 1571.
-=:Mike:=-
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Category 17, Topic 20
Message 3 Sat Feb 14, 1987
SPARROW.J at 00:24 EST
Miklos Garamszeghy (alias the king of burst mode) has written extensive burst
mode programming pieces in back issues of Twin Cities 128.
--Sparrow James
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Category 17, Topic 20
Message 4 Sat Feb 28, 1987
L.BURNS [Larry] at 10:58 CST
Mike and Sparrow -
Thanks for the help. Sparrow, would it be possible to upload those
articles to the board? It would be available to a lot more people.
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Category 17, Topic 20
Message 5 Sat Feb 28, 1987
SPARROW.J at 22:54 EST
Well, not to sound greedy, but they are available to everyone right now...if
you know what I mean.
--Sparrow James
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Category 17, Topic 20
Message 6 Fri Sep 25, 1987
PBE at 19:41 CDT
the April, 1987 issue of COMMODORE MAGAZINE has pretty good article on the
subject.
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Topic 24 Mon May 04, 1987
JMAXWELL [Aileron] at 20:32 EDT
Sub: 1571 problems
After trial and error, I discovered the 1571 acts like a 1541.
16 message(s) total.
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Category 17, Topic 24
Message 1 Mon May 04, 1987
JMAXWELL [Aileron] at 20:37 EDT
While using CP/M and trf files from Drive M: to Drive B: everything froze and
I thought the worst. Sysop Mike came through with the solution to my RAM Disk
problem, which left me with the problem with the 1571. They are[
a. In C128 mode will format only one side of disk (664 blocks)
b. In CP/M using NFORMAT will provide with a format error and no
formatting takes place
c. Will read only one side of a DS disk when in u9 or drive b:
d. Using Align Check 1571 (from GEnie) only reads to track 35
regardless of whether testing the good 1571 or the poor one. If this
isn't a serious problem, and if I can get along for a short while with one
good 1571 and the 1750 would I be betteoff waiting for whatever necessary
repairs until the new ROMs are available and can be installed at the same
time. Thanks. John
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Category 17, Topic 24
Message 2 Mon May 04, 1987
MICHAEL.M [-:SysOp:-] at 22:16 EDT
John -
When you boot up the 128 in 128-mode (or resetting in 128-mode) it issues a
U0>M1 command which places the drive in 1571-mode. (Are we tired of the word
'mode' yet?) Try and see if you are able to issue the command successfully
yourself. I am not totally familiar with drive differences, but I'd suspect
that replacing your old ROM's with the new should clear up the problem. If
not, the culprit could even be the Commodore controller, a gate-array chip
which Commodore doesnt support in the way of pin layouts and such so this is
just a guess on my part. If you were planning on giving the Upgrade ROMS a
go, call your local service center to see if they have them in stock yet.
From what we are hearing, CBM themselves have neither ROM sets sitting on the
shelf anymore and it could be a long wait.
Lastly....it couldnt hurt to try placing that piece of cardboard that came
inside the drive back *in* the drive, and give the thing another try. God
knows, this dumb little move has cleared up lots of strange problems for
folks. (Essentially placing the head back where it belongs.)
Good Luck!
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Category 17, Topic 24
Message 3 Mon May 04, 1987
MICHAEL.M [-:SysOp:-] at 22:22 EDT
John -
Almost forgot. Switch your two drives around (use the dipswitches and make
your old drive 8 into drive 9 and your old 9 into 8) and see if you have the
same problem with the same drive as a new device, and whether you encounter
the same problem with the other drive as device 9. Keep us posted.
- Mike
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Category 17, Topic 24
Message 4 Mon May 04, 1987
DEB [*SysOp*] at 23:51 EDT
Also, ALWAYs keep both drive 8 and drive 9 *on* if they are connected to the
computer!
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Category 17, Topic 24
Message 5 Tue May 05, 1987
MAYSMITCHELL [SounDesign] at 05:45 EDT
Ahh Mike,
About the WD1770, the disk controller, it executes the commands not
make them. It's responsible for other things like burst read/write, burst
track read/write (read entire tracks and writes to an entire track all in one
revolution which theorically can kick 64Kbytes/sec. (jumpin jehosaphat!) and
does the nice 2mhz things in life...Much like the Z80B does in the C128 (even
though I like the Z280..more on thst later)...so anyway, just letting ya know!
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Category 17, Topic 24
Message 6 Tue May 05, 1987
JMAXWELL [Aileron] at 19:02 EDT
Re msg #3. I have switched them around and the one that gives me the trouble
remains a 1541. Additionally, when the troubled drive is hooked up, the 1750
doesn't work. Must be something amiss. Thanks everyone who took the time to
reply. I'll keep working on it. John
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Category 17, Topic 24
Message 7 Tue May 05, 1987
MICHAEL.M [-:SysOp:-] at 20:08 EDT
Good luck, John!
Ken - Do you have (or know where to find) pin layouts on that puppy?
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Category 17, Topic 24
Message 8 Fri May 08, 1987
MAYSMITCHELL [SounDesign] at 05:29 EDT
To John: Of your drive messed up your 1750 then your either having I/O
problems or something is shorting (Direct Memory Access Controllers -DMAC-
suspend the 8502 in a sleep mode and takes over the I/O for it's own purpose-
if it can't use it when it suppose to then either you crash because of garbage
causing computer to go haywire or it just returns you to noraml state wthout
doing what it' suppose to do).
To Mike: As a matter of fact I should have the pin layouts for the disk
controller around here someh
?
ooops-somewhere around here...you should be able to get them from the
Winchester (it's a winchester chip) company or maybe Fred Bowen might spot you
a few pointers on how he hooked up the controller and it's importance in the
1571.
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Category 17, Topic 24
Message 9 Fri May 08, 1987
S.LEWIS at 06:48 MDT
Unless I got line noise, didn't I see the a reference to the troublesome drive
being a 15-4-1 and NOT a 1571?
Seems to me (acknowledged dummy on CP/M) that this could be the problem.
Steve
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Category 17, Topic 24
Message 10 Fri May 08, 1987
MICHAEL.M [-:SysOp:-] at 20:14 EDT
Ken - Pointers I can concoct.....pin-layout is what I can dearly use.
Steve - No, he has a 1571 that doesnt want to shed its 1541 clothing while in
128-mode. (Uh, 1541's can be used for CP/M too)
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Category 17, Topic 24
Message 11 Sat May 09, 1987
MAYSMITCHELL [SounDesign] at 16:59 EDT
Mike - Ok, even though it is in my mind what you want it for but doesn't make
a difference to me. Didn't spend 4 years in Electronic Tech/Enginr. to just
read books on Low level TTL's ya know! Will try to draw something up on
CAD/CAM or just a rough draft picture.
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Category 17, Topic 24
Message 12 Sun Sep 13, 1987
EMJAY at 02:39 EDT
Does anyone know whether the new Roms are being installed in 1571s when
shipped? If so, is there any way to determine whether the drive have the new
Roms installed other than opening the case which would be difficult in most
stores? Can it be determined by serial number. etc.?
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Category 17, Topic 24
Message 13 Sun Sep 13, 1987
SPARROW.J at 05:25 EDT
A new batch of 1571s are on the way. These are the CR (cost reduced units)
minus the WD1770 controller, as in the internal drive on the C-128D. These
drives do have the ROM upgrade in them. Very soon, there will be a very
definite way of telling what flavor 1571 you own by running a little program
Fred Bowen is writing that will be published in TC-128, and uploaded here. It
looks like it will be like about 10 lines of BASIC.
--Sparrow James
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Category 17, Topic 24
Message 14 Fri Sep 18, 1987
BKODADEK at 00:19 EDT
Just read the drive ROM and check the signature. Shouldn't take more than a
minute or two!
Bob
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Category 17, Topic 24
Message 15 Mon Dec 28, 1987
T.WHITE2 at 21:57 CST
A friend of mine is having a problem with a C-128 that he suspects is a drive
problem. He is running a program called Superscript. It used ine with no
problems, but now his computer freezes whenever he tries to load it. He took
the disc to a dealer and ran it on their computer with no problems. All his
other software loads and runs OK. This same type of thing happened to me once
with my old Apple, where some would work and some wouldn't, and mine was a
defective disc drive under warranty. Has anybody else ever had this type of
problem? Do the cheap do-it-yourself head cleaning discs work? Does this sound
like a drive problem? He would appreciate any advice. Thanks, Tom
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Topic 52 Fri Apr 15, 1988
LSD (Forwarded)
Sub: 1571 disk drive trouble.
I have a brand new C128/1571 combo The 1571 won't copy files using 'uni-copy'
program on the demo disk.
2 message(s) total.
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Category 17, Topic 52
Message 1 Fri Apr 15, 1988
JBEE (Forwarded)
When you get to the menu after hitting the F1 key, put the colored box on the
"set up disk/printer" option and hit the space bar. This will allow you to
set up your drives to allow copying with one drive. JBEE
XWELL [Aileron] at 19:02 EDT
Re msg #3. I have switched them around an