At 09:54 AM 11/30/97 -0800, you wrote:
>Most all of the consumer IR controls on the market use the same carrier
>frequency and the same modulation technique, and only differ in using
>different codes for different functions. Evidently some of your boxes
>use the same codes for different functions!
I am amazed that there isn't a standard for remotes -- 01 for on/off, 02 for
VolUp, 03 for VolDn, etc. But of course, nobody listens to me.
>I would guess that the IR keyboards in the PC Jr's pretty much guaranteed
>that they would never be adopted by schools. When all you have to do
>is point your keyboard at the teacher's PC and type "DEL *.*", any
>schools that did buy them must've unloaded them as soon as they could...
As I recall, there was much criticism of the IR keyboard since if you were
far enough away to make it useful, you were too far away to read the screen.
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.crl.com/~sinasohn/
A 68040 -based machine is not that old, maybe a bit under 10 years. What I
was wondering is whether or not there is any objective advantage of old
machines to new ones. F.E. one could get an old IBM mini (System/3X) for
little or no money, but is there anything doable on it that is impossible to
do on a W****** 95 machine?
In a message dated 97-11-30 21:43:54 EST, you write:
<< FYI...
In ba.market.computers, George Akimov <iga(a)metabyte.com> wrote:
>Our company has a computer which we would like to donate to college or
>school.
>The name is "ARETE" Model 1224/160/16 OS - ARIX, ARIXNET Ethernet
>2 CPU boards, 68040 -25mhz
>64 MB memory
>4-800 MB Disks
>16 serial ports
>240 v.power
>Expansion Cabinet 1200/exp
>474 MB disk drive 1000/D474
>9-track Tape Drive 1000/9T-HP
>9-track Tape/Disk Controller 1000/DT2-9T
>Software, incl INFORMIX.
>>
Greetings all!
I recently received a ZX-81/TS-1000 (can't tell, the case was gone and the
TS-1000 is marked as ZX-81 on the board - doesn't matter anyway..)
It has a second set of ROMs, selectable via the channel switch, which
comes up as:
PLURI-FORTH BY TREE SYSTEMS
COPYRIGHT 1983
Does anyone know about this, or, hopefully, have a manual? VLIST tells me
the words but a manual would be really nice. I've since mounted the board
with homemade keyboard (which I didn't make) in an old Apple II case. Add
a few connectors on the case and I'm all set with a nice little 16k Forth
machine!
- Ron Kneusel
rkneusel(a)mcw.edu
Neil McNeight wrote:
>On Fri, 28 Nov 1997, Sergio Izquierdo Garcia wrote:
>> I've obtained one streamer tape drive, Wangtek Model 5099EN24.
>> I have read that Linux can support it directly.
>
> It's a SCSI device (at least the ones I've seen are). As long as you have
> a SCSI card to plug it in to and the drivers for that, you shouldn't need
> anything else. But then, I've never used one under DOS or Windows either.
The EN drives are _not_ SCSI drives. You will need a controller card for them.
Roger Ivie
ivie(a)cc.usu.edu
>PC jr.
Would you like to have another IR keyboard?
Also, do you need any C64 stuff? I've been trying to get rid of it for a
while now (You name it, I have it, except the C64 and all kinds of expansion
boards/cartriges)
<quite a few Rainbow user groups sponserred by DEC. Allison I'm sure,
<has all the specs and there is a downloadable systems site.
Actually I'm not current on the Rainbow and a few otehr would know where
the stuff is.
< Not being mini or DEC literate what is the RX50 format and what
<systems (platforms) is it used on ?
Basic RX50:
Single sided, ten 512 byte sectors per track soft sector and 80 tracks at
96 TPI for a total of 409kb formatted space per disk. It was DECs attempt
to get more density on low cost floppy. While the format worked the slow
dual spindle single positioner dual drive was a dog and internal pressure
made it's use manditory for many systems that would have gone with buyout
floppy drives like teac or sony. In the late 80s that would happen as
a result for the need for PC compatability (AT) and later lower cost and
more compact (3.5" 1.44mb).
The format is not half a 1.2mb drive as it's 250kbit MFM(same as 360k
floppy) and the spin rate is 300 rpm. It emerged whe DSQD drives were
being seen on CP/M-80 and the 16 bit systems of the time. Back then CP/M
could effienctly use a pair of 800k floppies cheaper than hard disk. DSQD
were 96tpi, 80 track 730->820k per drive and were essentially 360k drives
with 80 instead of 40 tracks. This format combo fell into disuse quickly
with poor acceptance due to the general chaos of 5.25" disk formats emerging
between 81-86ish. The driver of that chaos was the need for more space and
the still very high cost of then 5-40mb hard disks. The availability of
media for IBM XT 360k made it a pseudo standard.
It was introduced on the early 80s and used on most all DEC systems until
the late 80s when the VAXmate broke the mold by used RX33(1.2mb at
compatable) and later with 3.5" RX23(1.44)/24(720k) on the 3100 and PC
systems.
Allison
<I have a query about the operation of a KSR 33 TTY when reading paper
<tape : does the TTY blindly send the characters read from the tape at 10
<cps or is the tape advance and read triggered by a signal from whatever
<th TTY is connected to.
This is limted to ASR33s as they have the reader punch, KSR33 is keyboard
and printer only.
The answer is yes! Some systems have provision for tty reader control
and enables single character read. Others just take it at 10 cps as they
have all the time in the world between characters, it's not fast.
Allison
