We have 10+ flat bed scanners, mostly SCSI, with ADF attachments. Most of
them are HP, a few are AGFA or another brand. $20 each plus shipping, tested
working. No software included.
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
(830)792-3400 phone (830)792-3404 fax
AOL IM elcpls
_____
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2904 / Virus Database: 2641/6185 - Release Date: 03/17/13
I have 2 old, heavy machines that I looked up on Google over 10 years ago.
1 appears to be Unix-only document scanner with sheet feeder. The original
software, which came on 5.25" floppies, had OCR software. I MIGHT still
have the floppies here somewhere. Anyone interested in these 2 old beasts?
Bell & Howell Classic TDR-500 is apparently for microfilm capture? Parts are
still readily available online, if needed.
Xerox K5200 model SA4-2 with ADF-4, includes 2 very thick cables.
Both very dusty/dirty, never turned on.
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
(830)792-3400 phone (830)792-3404 fax
AOL IM elcpls
_____
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2904 / Virus Database: 2641/6185 - Release Date: 03/17/13
My earliest memories of seeing computers in action were at the library. Old
ADM-3 terminals with light pens to scan in barcodes on the books and on
your library card. Plus the muffled sound of a line printer in back doing
lists of late check-outs.
This would have been in the 1980's. The library I used to go to still had
those ADM's well into the '90s, then replaced with gray sided, amber
screened WYSE VT-100 lookalikes. But the UI looked the same, so I assume
the backend was the same.
Anyone know what minis ran library management software back then? I know
the university I went to was all Amdhal with 5250 terminals, but the local
libraries obviously used something smaller.
At 20:32 -0600 3/1/13, <Ben> wrote:
>Offhand I would say yes. Now 20+ years later I don't have any paper
>docs of the COCO II and the XT.
For Color Computer
The Byte article on COCO (original) says 800 mV 1500 bps.
Greg Lomont's Color computer guide says:
Color BASIC saves a file as a series of blocks, each with 0-255 bytes
of data. Some blocks need
preceded by a leader to establish timing.
Each bit is recorded as a single cycle of a sine-wave. A "1" is a
single cycle at 2400 Hz, and a "0" is
a single cycle at 1200 Hz. Bytes are stored least significant bit
first. Bits are recognized when the
sine wave crosses from positive to negative, so loudness is not as
important as one might expect.
A file consists of:
1. a leader
2. a filename block
3. a 1/2 second gap
4. another leader
5. some number of data blocks
6. an end-of-file block
A leader is just hex $80(128 dec) bytes of hex $55 (binary 01010101).
A block contains:
1. two "magic" bytes ($55 and $3C)
2. one byte - block type (00=filename, $01=data, $FF=EOF)
3. one byte - data length ($00 to $FF)
4. 0 to 255 bytes - data
5. one byte - checksum (sum of data, type, and length bytes)
6. another magic byte ($55)
Filename blocks have $F(15) bytes of data; EOF blocks have zero bytes
of data; data blocks have
$00-$FF bytes of data indicated by length byte.
A filename block contains:
1. eight bytes - the filename
2. one byte - file type ($00=BASIC, $01=data, $02=machine code)
3. one byte - ASCII flag ($00=binary, $FF=ASCII)
4. one byte - gap flag ($00=no gaps, $FF=gaps)
(The tech manual incorrectly (?) shows 01 as the code for "no gaps")
5. two bytes - machine code starting address
6. two bytes - machine code loading address
There should be no gaps, except preceding the file, and in case the
filename blocks requests gaps,
in which case there is a 1/2 second gap and leader before each data
block and EOF block.
Hardware
The cassette cable has a 5-pin DIN connector on one end, that plugs
into the back of the CoCo; the
other end has three earphone-style plugs, that plug into the EAR, AUX
(or MIC), and REMOTE jacks. The remote-control plug is smaller than
the other two. The other two are differentiated by
color: the black one plugs into the EAR jack, while the grey one
plugs into AUX.
Here is an ASCII drawing of that connector, including a pinout and
showing how the pins are
numbered. The drawing is of the connector at the end of the cable,
with the pins pointing toward
you. So if you are looking at the back of the machine, at the
connector there, this pinout is
backwards. My apologies for the wacky numbering; this is the same
numbering as in the CoCo-1
technical manual.
------- Pin# Name Connects to
/ \___/ \ ---- ------- -----------------------------------
/ \
/ \ 1 CASSMOT SG stem
| | 2 GND B stem, LG stem
| 1o o3 |
| | 3 CASSMOT SG tip
o o
\ 4 o 5 / 4 CASSIN B tip
\ 2 /
\ / 5 CASSOUT LG tip
-------
B=black SG=small grey LG=large grey
The names are given from the perspective of the computer, so "OUT"
means output from the
computer, input to the cassette, and it should go into the AUX (or
MIC) jack while the cassette is
recording.
--
- Mark 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:
Think of it as Evolution in Fast-Forward.
I was going through some boxes of old documents as I prepare to thin out
my computer collection and ran across a couple leads that I had 30+ years
ago on a couple early vacuum tube era computers--one was a Bendix G-15 and
the other was a Royal Precision LGP-30. Thought it would be fun to see if
either computer was still there and turns out that the Bendix G-15 is
buried in a storage unit yet! I haven't heard back on the LGP-30 yet. When
the weather warms up, I will get a chance to help dig out the Bendix and
hopefully make a deal on it.
Apparently, the Bendix was operational before going into storage in the
mid-1970's. So, what are the chances that after sitting for almost 40
years that it would still be operational? I know that vaccum tubes can
deteriorate but those are easy to replace. What about the capacitors,
resistors, and diodes? I do not know if the storage unit was climate
controlled, but if not, I assume corrosion could be a problem with all the
contacts. What other issues might one expect with an old system like this?
Unfortunately, I am not an electronics expert but always like a challenge.
I now regret selling my Bendix Diode tester a few years ago on eBay! Maybe
I will have to rent in some day if I make the deal!
On 03/13/2013 01:46 PM, Robin England wrote:
> On 03/12/2013 09:29 AM, Robin England wrote:
>> Does anyone have a Brier Technology BR-3020 or BR-3225 high
>> capacity floppy drive I could borrow please?
>
>> Wouldn't an Insite I325VM work just as well if reading is your
>> object? I suspect that there are far more of them than the Brier
>> units.
>
>> --Chuck
>
> Thanks Chuck. Do you know for sure that the I325VM can read the
> Flextra 25MB discs?
>
>No, unfortunately, I can't say for certain Two companies, both in San
>Jose (wasn't Insite on "Fortran Drive"?) offering similar capacities
>using similar techniques at about the same time.
>
>The 25MB, as I understand it is "unformatted' capacity, so both drives
>are fairly close in advertised capacity. Both use zoned recording and
>RLL, but beyond that I can only say that the Insite devices are/were
>more common and so probably worth a shot.
>
>IIRC, Insite also trademarked the term "floptical"...
>
>?Chuck
Thanks Chuck. I have procured the I325VM now and will post back when I have empirical knowledge about the compatibility.
Cheers
Robin
The new VT220 font style sheets have been activated for the main site.
I've also got the latest backup (2007) of Don Maslin's boot disk and ROM
image archive online. EVERYTHING is now available!
As time permits, I'll get the other pages moved over to the new style
sheet.
tnx!
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.
http://www.diy-cockpits.org/coll - Go Collimated or Go Home.
Some people collect things for a hobby. Geeks collect hobbies.
ScarletDME - The red hot Data Management Environment
A Multi-Value database for the masses, not the classes.
http://www.scarletdme.org - Get it _today_!
----- Original Message -----
> My earliest memories of seeing computers in action were at the library. Old
> ADM-3 terminals with light pens to scan in barcodes on the books and on
> your library card. Plus the muffled sound of a line printer in back doing
> lists of late check-outs.
>
> This would have been in the 1980's. The library I used to go to still had
> those ADM's well into the '90s, then replaced with gray sided, amber
> screened WYSE VT-100 lookalikes. But the UI looked the same, so I assume
> the backend was the same.
>
> Anyone know what minis ran library management software back then? I know
> the university I went to was all Amdhal with 5250 terminals, but the local
> libraries obviously used something smaller.
in the early 90's, I remember a gold coast library using a greenscreen and keyboard only terminal
so customers could search the library's database
i don't remember what the staff where using as I was young back them
tom
