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Retro computing and gaming, sci-fi books, tv and movies and other geeky stuff.Re: Model 100 problem
https://www.megalextoria.com/forum2/index.php?t=rview&goto=281247&th=86370#msg_281247
Article-I.D.: jc3b21.642
Posted: Sat Nov 22 13:18:22 1986
Date-Received: Mon, 24-Nov-86 01:06:45 EST
References: <437@moncol.UUCP> <1705@ncoast.UUCP>
Organization: St. Petersburg Jr. College, FL
Lines: 33
Keywords: Moved rom chip
Summary: Print peek(0) returns 195.
Xref: watmath comp.sys.ibm.pc:198 comp.sys.tandy:9
In article <1705@ncoast.UUCP>, robertd@ncoast.UUCP writes:
> Some thing happened to my model 100
> (The only one with a modem). The clock
> doesn't work and the date has wierd charcters.
> Also, the curser slow, and some times
> keys don't register... I thought I
> caught a moved rom chip, could some one
> with a model 100 type "print peek(0)"
> and tell me the result?
> Thanx
> -rd
> ncoast!robertd
Given "for x=0 to 9: print peek(x): next" the Model 100 produces
195
51
125
77
69
78
85
0
126
227
Good luck.
--Fabbian Dufoe
350 Ling-A-Mor Terrace South
St. Petersburg, Florida 33705
813-823-2350
UUCP: ...akgua!usfvax2!jc3b21!fgd3
]]>1986-11-22T18:18:22-00:00Re: Why no single density?
https://www.megalextoria.com/forum2/index.php?t=rview&goto=281246&th=86369#msg_281246
Article-I.D.: watmum.673
Posted: Tue Nov 18 09:05:11 1986
Date-Received: Tue, 18-Nov-86 22:04:46 EST
References: <437@moncol.UUCP> <1293@hoptoad.uucp>
Reply-To: smvorkoetter@watmum.UUCP (Stefan M. Vorkoetter)
Distribution: net
Organization: U of Waterloo, Ontario
Lines: 11
Keywords: Intel 8272a, FDC, IBM-PC, Tandy 1000
Xref: mnetor comp.sys.ibm.pc:140 comp.sys.tandy:8
In article <1293@hoptoad.uucp> farren@hoptoad.UUCP (Mike Farren) writes:
> Single density disk controllers write the data to the diskette at 250K bit/
> sec. Double density controllers do so at 500K. The IBM controller has only
> the 500K clock on board - it would take a hardware change to allow it to
> do 250K. Not impossible, just impossible with the standard controller.
There is more of a difference between single and double density than that.
Double density is basically single density with some redundant flux transitions
left out to allow more data to be recorded without increased media bandwidth.
To record 250Kbps at single density requires just as high a clock rate as to
record 500Kbps at double density.
]]>1986-11-18T14:05:11-00:00Re: Why no single density?
https://www.megalextoria.com/forum2/index.php?t=rview&goto=281244&th=86369#msg_281244
Article-I.D.: nikhefk.61
Posted: Mon Nov 17 18:34:02 1986
Date-Received: Mon, 17-Nov-86 21:45:12 EST
References: <437@moncol.UUCP> <1293@hoptoad.uucp>
Reply-To: henkp@nikhefk.uucp (Henk Peek)
Distribution: net
Organization: NIKHEF-K, Amsterdam
Lines: 23
Xref: mnetor comp.sys.ibm.pc:121 comp.sys.tandy:6
Apparently-To: rnews@mcvax
In article <1293@hoptoad.uucp> farren@hoptoad.UUCP (Mike Farren) writes:
> In article <437@moncol.UUCP> john@moncol.UUCP (John Ruschmeyer) writes:
>> Recently I've been looking at ads for programs to read/write alien disks on
>> an IBM compatable. One thing I've noticed, though, is that none of them
>> support the formatting of single density disks (old Osborne I, TRS-80 Model
I, etc.).
>> Is there some imitation of the disk controller in an IBM-PC which
>> prevents single ensity operation or is it some limitation of the BIOS?
> Single density disk controllers write the data to the diskette at 250K bit/
> sec. Double density controllers do so at 500K. The IBM controller has only
> the 500K clock on board - it would take a hardware change to allow it to
> do 250K. Not impossible, just impossible with the standard controller.
The olivetti M24 (ATT 6300) has a single- double density switchs-
circuit on the motherbord floppy controller. A bit in a floppy contol
register does the switch. I don't have documentation with me.
I think that this machine wil boot from single density floppys.
At boot the bios switch between both modes when it can not read your
boot floppy.
henk peek henkp@nikhefk.uucp seismo!mcvax!nikhefk!henkp.uucp
]]>1986-11-17T23:34:02-00:00Model 100 problem
https://www.megalextoria.com/forum2/index.php?t=rview&goto=281245&th=86370#msg_281245
Article-I.D.: ncoast.1705
Posted: Mon Nov 17 06:58:55 1986
Date-Received: Tue, 18-Nov-86 09:25:04 EST
References: <437@moncol.UUCP>
Reply-To: robertd@ncoast.UUCP (Robert DeMarco)
Organization: North Coast Public Access UN*X, Cleveland, OH
Lines: 13
Keywords: Moved rom chip
Xref: mnetor comp.sys.ibm.pc:130 comp.sys.tandy:7
Some thing happened to my model 100
(The only one with a modem). The clock
doesn't work and the date has wierd charcters.
Also, the curser slow, and some times
keys don't register... I thought I
caught a moved rom chip, could some one
with a model 100 type "print peek(0)"
and tell me the result?
Thanx
-rd
ncoast!robertd
]]>1986-11-17T11:58:55-00:00Re: Why no single density?
https://www.megalextoria.com/forum2/index.php?t=rview&goto=281243&th=86369#msg_281243
Article-I.D.: hoptoad.1293
Posted: Sat Nov 15 07:07:02 1986
Date-Received: Sat, 15-Nov-86 23:54:55 EST
References: <437@moncol.UUCP>
Reply-To: farren@hoptoad.UUCP (Mike Farren)
Distribution: net
Organization: Nebula Consultants in San Francisco
Lines: 27
Keywords: Intel 8272a, FDC, IBM-PC, Tandy 1000
Xref: mnetor comp.sys.ibm.pc:87 comp.sys.tandy:5
In article <437@moncol.UUCP> john@moncol.UUCP (John Ruschmeyer) writes:
> Recently I've been looking at ads for programs to read/write alien disks on
> an IBM compatable. One thing I've noticed, though, is that none of them
> support the formatting of single density disks (old Osborne I, TRS-80 Model
> I, etc.).
>
> Forgive a naive question, but why is this the case? Is there some
> limitation of the disk controller in an IBM-PC which prevents single
> density operation or is it some limitation of the BIOS?
>
> Looking in the tech manual for my own machine (a Tandy 1000), I noticed
> that it uses an Intel 8272A as the floppy disk controller. According to the
> spec sheet, this chip is capable of single density operation. If so, then
> why can't I find a program to use it that way?
>
Single density disk controllers write the data to the diskette at 250K bit/
sec. Double density controllers do so at 500K. The IBM controller has only
the 500K clock on board - it would take a hardware change to allow it to
do 250K. Not impossible, just impossible with the standard controller.
--
----------------
"... if the church put in half the time on covetousness
Mike Farren that it does on lust, this would be a better world ..."
hoptoad!farren Garrison Keillor, "Lake Wobegon Days"
]]>farren1986-11-15T12:07:02-00:00Looking for ALDS owners
https://www.megalextoria.com/forum2/index.php?t=rview&goto=281241&th=86368#msg_281241
Article-I.D.: topaz.7044
Posted: Fri Nov 14 12:27:49 1986
Date-Received: Sat, 15-Nov-86 03:13:07 EST
Distribution: net
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 8
I have some questions about Assembly Language Development System
package for the Model III/IV. If you are a owner of such a package,
could you please leave me your net address or mailing address so
that I may contact you directly. Thank you very much.
William Chao
wchao@blue.rutgers.edu or @topaz.rutgers
]]>1986-11-14T17:27:49-00:00Why no single density?
https://www.megalextoria.com/forum2/index.php?t=rview&goto=281242&th=86369#msg_281242
Article-I.D.: moncol.437
Posted: Mon Nov 10 23:56:07 1986
Date-Received: Sat, 15-Nov-86 05:08:28 EST
Organization: Monmouth College, W. Long Branch, NJ
Lines: 26
Keywords: Intel 8272a, FDC, IBM-PC, Tandy 1000
Xref: watmath comp.sys.ibm.pc:79 comp.sys.tandy:4
Recently I've been looking at ads for programs to read/write alien disks on
an IBM compatable. One thing I've noticed, though, is that none of them
support the formatting of single density disks (old Osborne I, TRS-80 Model
I, etc.).
Forgive a naive question, but why is this the case? Is there some
limitation of the disk controller in an IBM-PC which prevents single
density operation or is it some limitation of the BIOS?
Looking in the tech manual for my own machine (a Tandy 1000), I noticed
that it uses an Intel 8272A as the floppy disk controller. According to the
spec sheet, this chip is capable of single density operation. If so, then
why can't I find a program to use it that way?
Thanks in advance for any replies. If you know of a program which will deal
with single density disk, feel free to pass the name along.
--
Name: John Ruschmeyer
US Mail: Monmouth College, W. Long Branch, NJ 07764
Phone: (201) 571-3557
UUCP: ...!vax135!petsd!moncol!john ...!princeton!moncol!john
...!pesnta!moncol!john
This isn't a coronation- this is bad comedy.
-Galvatron
]]>john1986-11-11T04:56:07-00:00net.micro.trs-80 is being renamed comp.sys.tandy
https://www.megalextoria.com/forum2/index.php?t=rview&goto=281240&th=86367#msg_281240
Article-I.D.: cbosgd.3009
Posted: Fri Nov 7 15:06:13 1986
Date-Received: Sat, 8-Nov-86 05:49:48 EST
Distribution: na
Organization: AT&T Bell Laboratories, Columbus, Oh
Lines: 12
Xref: watmath net.micro.trs-80:846 comp.sys.tandy:2
This newsgroup is being renamed from net.micro.trs-80 to comp.sys.tandy.
This renaming will gradually take place over the next few weeks.
More and more messages posted to this newsgroup will be aliased
into the new newsgroup as they pass through the net, and people
will begin to post to the new group. After a few weeks, the
old name will be removed.
This note is to inform you of the renaming so you can begin to
read the new group as well as the old group.
Mark Horton
Director, the UUCP Project
]]>1986-11-07T20:06:13-00:00undocumented funky coco3 stuff
https://www.megalextoria.com/forum2/index.php?t=rview&goto=281239&th=86366#msg_281239
Article-I.D.: net1.313
Posted: Wed Nov 5 23:26:31 1986
Date-Received: Fri, 7-Nov-86 21:26:00 EST
Reply-To: fritzz@net1.ucsd.edu (john)
Organization: abercrombie bmf graphics
Lines: 17
In the middle of the new roms on the coco 3 there is some very strange
code. The most interesting example of this is part of the old roms that
got left behind. There was a command on the coco2 called DLOAD which
was used to communicate between machines. On the coco3 it does some strange
stuff: type in DLOAD folowed by a colon, followed by alternating ctl and
alt keys (they look like @ and =). about three each should do. then hold
down both the ctl and alt and hit return. wowie zowie. then do a soft
reset and you're back to normal. It should look like this before
you hit return
DLOAD:@=@=@=
f
Bonus question: do you recognize what you see?
]]>fritzz1986-11-06T04:26:31-00:00