Re: ASCI u68 (SystemX)

[Henk Gooijen]

OK. Did you post a link to some pictures? That can be helpful,
I missed the link if you did post it. The picture can help in
understanding what you have. I already know it has the 6800 :-)
and three 6821 PIAs. Is there also a 6850 ACIA on board?
Do you have some documentation?  It could well be possible that
all you have after power up is the keypad and 7-segment displays
as on the MEK6800D2.
Check the power supply on the M6800 CPU. If you have a scope
you can check for activiy on the address and data pins, and the
"phi2" pin and VMA pin. I f we get further I probably need to get
the M6800 user manual on my desk.

- Henk


-Oorspronkelijk bericht- 
From: Brad

Sent: Friday, October 16, 2015 10:37 PM
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: ASCI u68 (SystemX)

Thanks Henk,

I tried that.  No prompt comes up with PUTTY on serial set at any baud rate. 
Instead on the LED display I get a C, or an S sometimes.


-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Henk 
Gooijen

Sent: Friday, October 16, 2015 11:56 AM
To: General Discussion: On-Topic and Off-Topic Posts 
Subject: Re: ASCI u68 (SystemX)

-Oorspronkelijk bericht-
From: Brad
Sent: Friday, October 16, 2015 8:27 PM
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: ASCI u68 (SystemX)

Many thanks.  I'll take a quick look online just to see if I can save you 
the trouble.  I'm surprised at how little documentation there is for this 
thing.


As a general rule, does anyone know -- if you have a single board computer 
like this with serial connector, is that 'live' all the time?  Or do you 
usually have to invoke a program in order for a terminal to connect to it 
and use it?


-
From all the SBCs that I know, the standard serial port is always active. 
The on-board monitor with very basic commands uses it as only means of 
communication.
After reset the monitor will "print" possible a one-line identification and 
on the next line some form of prompt.

Could be * or .  or > or - or whatever.

You need to know the com ports settings, but it prints an ID line you can 
try several baudrates. 9600 is a good start.


If you want 6800 info, ask. I can dream 6800 opcodes!
INX=$08, LDA # =$86, DEX=$09, STAindexed =$A6. etc.
Depending on the RAM size, I have a StarTrek version in 6800 assembler that 
uses a serial port ... IIRC, it is some 1.5k


- Henk

-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.6172 / Virus Database: 4447/10805 - Release Date: 10/12/15

Atari Unix

[Liam Proven]

Apparently efforts are underway to get this unreleased product working.

I believe it was aimed at the TT030 desktop "workstation" model of the
ST family:


https://en.wikipedia.org/wiki/Atari_TT030


Atari did licence UNIX™ and got a really good deal — $10 a seat!


http://techcrunch.com/2011/01/18/the-atari-st-could-have-run-unix/


… But the original 68000 version couldn't hack it. No MMU.


http://www.dadhacker.com/blog/?p=1383


The product did eventually exist:


http://www.atariunix.com/


But as ever it was too little, too late.


-- 
Liam Proven • Profile: http://lproven.livejournal.com/profile
Email: lpro...@cix.co.uk • GMail/G+/Twitter/Flickr/Facebook: lproven
MSN: lpro...@hotmail.com • Skype/AIM/Yahoo/LinkedIn: liamproven
Cell/Mobiles: +44 7939-087884 (UK) • +420 702 829 053 (ČR)

RE: Atari Unix

[Dave G4UGM]

> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Liam
> Proven
> Sent: 17 October 2015 13:05
> To: Discussion: On-Topic and Off-Topic Posts 
> Subject: Atari Unix
> 
> Apparently efforts are underway to get this unreleased product working.
> 
> I believe it was aimed at the TT030 desktop "workstation" model of the ST
> family:
> 
> 
> https://en.wikipedia.org/wiki/Atari_TT030
> 
> 
> Atari did licence UNIX™ and got a really good deal — $10 a seat!
> 
> 
> http://techcrunch.com/2011/01/18/the-atari-st-could-have-run-unix/
> 
> 
> … But the original 68000 version couldn't hack it. No MMU.
> 
> 
> http://www.dadhacker.com/blog/?p=1383
> 
> 
> The product did eventually exist:
> 
> 
> http://www.atariunix.com/
> 
> 
> But as ever it was too little, too late.
> 

Perhaps also "too expensive"? 


> 
> --
> Liam Proven • Profile: http://lproven.livejournal.com/profile
> Email: lpro...@cix.co.uk • GMail/G+/Twitter/Flickr/Facebook: lproven
> MSN: lpro...@hotmail.com • Skype/AIM/Yahoo/LinkedIn: liamproven
> Cell/Mobiles: +44 7939-087884 (UK) • +420 702 829 053 (ČR)

Re: Atari Unix

[ethan]

Apparently efforts are underway to get this unreleased product working.
I believe it was aimed at the TT030 desktop "workstation" model of the
ST family:
https://en.wikipedia.org/wiki/Atari_TT030
Atari did licence UNIX™ and got a really good deal — $10 a seat!
http://techcrunch.com/2011/01/18/the-atari-st-could-have-run-unix/
… But the original 68000 version couldn't hack it. No MMU.
http://www.dadhacker.com/blog/?p=1383
The product did eventually exist:
http://www.atariunix.com/
But as ever it was too little, too late.


I was always under the impression that a few of them made it out there?

I have a TT030 and actually was just looking at it last night. It has a 
VME slot (as they call it) that has a dual serial port board installed. I 
think it has a modem port. I know it's not compatible with normal ST 
softwar,e has VGA, does not use a ps2 keyboard but uses an ST keyboard, 
and has real SCSI versus ACSI!


Strange computers. Doesn't look quite as cool as the Mega 2/4 IMHO but 
still interesting!



--
Ethan O'Toole

Re: Atari Unix

[Liam Proven]

On 17 October 2015 at 15:06, Dave G4UGM  wrote:
> Perhaps also "too expensive"?

AIUI Atari UNIX never shipped as a product, so that’s academic; nobody
knows what they would have charged. I’m not sure about this, though.

But the “big 3” alternative home computer platforms of the 1980s all
offered a UNIX — Acorn RISC-iX, Commodore Amiga UNIX and Atari UNIX.
None caught on — they were vastly expensive for home users, and the
machines were seen as toys by professionals using SUN workstations and
so on.

-- 
Liam Proven • Profile: http://lproven.livejournal.com/profile
Email: lpro...@cix.co.uk • GMail/G+/Twitter/Flickr/Facebook: lproven
MSN: lpro...@hotmail.com • Skype/AIM/Yahoo/LinkedIn: liamproven
Cell/Mobiles: +44 7939-087884 (UK) • +420 702 829 053 (ČR)

Re: Atari Unix

[Liam Proven]

On 17 October 2015 at 16:01,   wrote:
> I was always under the impression that a few of them made it out there?
>
> I have a TT030 and actually was just looking at it last night. It has a VME
> slot (as they call it) that has a dual serial port board installed. I think
> it has a modem port. I know it's not compatible with normal ST softwar,e has
> VGA, does not use a ps2 keyboard but uses an ST keyboard, and has real SCSI
> versus ACSI!
>
> Strange computers. Doesn't look quite as cool as the Mega 2/4 IMHO but still
> interesting!

Er, possible crossed wires here.

The TT shipped, sure.

It’s Atari UNIX that I /think/ did not.


-- 
Liam Proven • Profile: http://lproven.livejournal.com/profile
Email: lpro...@cix.co.uk • GMail/G+/Twitter/Flickr/Facebook: lproven
MSN: lpro...@hotmail.com • Skype/AIM/Yahoo/LinkedIn: liamproven
Cell/Mobiles: +44 7939-087884 (UK) • +420 702 829 053 (ČR)

RE: Atari Unix

[Dave G4UGM]

-Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Liam
> Proven
> Sent: 17 October 2015 15:19
> To: General Discussion: On-Topic and Off-Topic Posts
> 
> Subject: Re: Atari Unix
> 
> On 17 October 2015 at 16:01,   wrote:
> > I was always under the impression that a few of them made it out there?
> >
> > I have a TT030 and actually was just looking at it last night. It has
> > a VME slot (as they call it) that has a dual serial port board
> > installed. I think it has a modem port. 

That is an AppleTalk port.

>> I know it's not compatible
> > with normal ST software 

It is not compatible with games software that relies on running on an  8Mhz 
68000 or has other hardware dependencies. Much of the business software still 
works fine. 

> > has VGA, does not use a ps2 keyboard but uses
> > an ST keyboard, and has real SCSI versus ACSI!
> >

The "real SCSI" is still somewhat broken and very temperamental.

> > Strange computers. Doesn't look quite as cool as the Mega 2/4 IMHO but
> > still interesting!
> 
> Er, possible crossed wires here.
> 
> The TT shipped, sure.
> 
> It’s Atari UNIX that I /think/ did not.
> 
> 
> --
> Liam Proven • Profile: http://lproven.livejournal.com/profile
> Email: lpro...@cix.co.uk • GMail/G+/Twitter/Flickr/Facebook: lproven
> MSN: lpro...@hotmail.com • Skype/AIM/Yahoo/LinkedIn: liamproven
> Cell/Mobiles: +44 7939-087884 (UK) • +420 702 829 053 (ČR)

Re: PDP-12 Restoration at the RICM (tony duell)

[David Gesswein]

On Tue, Oct 13, 2015 at 08:32:49PM -0400, Michael Thompson wrote:
> > What exactly do you mean by 'glitches'? Are these on a TTL level signal,
> > an analogue
> > output of the read amplifer, or what?
> >
> 
> You can see the logic analyzer trace of many of the TC12 signals here.
> 
> 
> The labels at the far left of the image include the backplane slot and pin
> number for the probe location. The signals were TTL level by the time the
> logic analyzer saw them.
> 
Have you hooked up a digital scope to the read amplifier and seen if the
analog waveform has problems when the glitches occur? Seeing both the analog 
and the digital output would help see where the signal is going wrong.

The other is if you have enough memory and channels in your test equipment 
you can trigger off a signal indicating that the block number was missed 
then look back to see how the block number was wrong. If you have it a 
trigger out from the logic analizer can trigger a digital scope to capture 
at the same time to see the head amplifier signal.

Re: Atari Unix

[Mark Linimon]

On Sat, Oct 17, 2015 at 03:26:53PM +0100, Dave G4UGM wrote:
> The "real SCSI" is still somewhat broken and very temperamental.

As someone who used to make a living working on VMEbus equipment ...

... if a machine has a VMEbus slot, that description usually applies.
In particular, never assume that multiple bus masters can exist on
the same backplane.

I fought that battle with a Solbourne.  Conclusion: it was fine to
add in one of our peripheral boards but that was it.  They had never
even implemented the hard parts of the spec.

mcl

RE: Atari Unix

[Dave Wade]

> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Mark
> Linimon
> Sent: 17 October 2015 17:30
> To: General Discussion: On-Topic and Off-Topic Posts
> 
> Subject: Re: Atari Unix
> 
> On Sat, Oct 17, 2015 at 03:26:53PM +0100, Dave G4UGM wrote:
> > The "real SCSI" is still somewhat broken and very temperamental.
> 
> As someone who used to make a living working on VMEbus equipment ...
> 
> ... if a machine has a VMEbus slot, that description usually applies.
> In particular, never assume that multiple bus masters can exist on the
same
> backplane.
> 
> I fought that battle with a Solbourne.  Conclusion: it was fine to add in
one of
> our peripheral boards but that was it.  They had never even implemented
> the hard parts of the spec.
> 
> mcl


I think the only use I ever saw for the slot in the Atari TT was for Video
cards. My TT had one, but it needed extra software to drive it...

Dave

Re: PDP8 / ETOS

[David Gesswein]

On Fri, Oct 16, 2015 at 11:03:51PM -0400, Rick Murphy wrote:
> At 02:43 PM 10/16/2015, Joe wrote:
> 
> That would be quite impressive it it actually worked.
> Does ETOS support FORTRAN programs, with the FRTS handling
> interrupts et al?
> 
It appears to have limited (to the point of probably not being useful) support.

System users guide pg 4-10. Fortran IV. Real time functions and floating
point processor functions are not currently supported. The internal
device handlers for high speed reader/punch and card reader are not supported.
Device independent I/O must be used to access these devices.

I don't know if that means the floating point instrutions won't work but
the software emulator fallback will or any attempt to use floating point will 
fail.

Re: PDP8 / ETOS

[David Gesswein]

On Fri, Oct 16, 2015 at 12:41:56PM -0600, Joe wrote:
>  I found the .TIFF manual on another site, and PDF'd it. 
> 
Its on my site also

http://www.pdp8online.com/pdp8cgi/query_docs/query.pl?Search=etos

Re: Atari Unix

[Plamen Mihaylov]

The RIebl ethernet card is working with ASV

On Sat, Oct 17, 2015 at 8:23 PM, Dave Wade  wrote:

> > -Original Message-
> > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Mark
> > Linimon
> > Sent: 17 October 2015 17:30
> > To: General Discussion: On-Topic and Off-Topic Posts
> > 
> > Subject: Re: Atari Unix
> >
> > On Sat, Oct 17, 2015 at 03:26:53PM +0100, Dave G4UGM wrote:
> > > The "real SCSI" is still somewhat broken and very temperamental.
> >
> > As someone who used to make a living working on VMEbus equipment ...
> >
> > ... if a machine has a VMEbus slot, that description usually applies.
> > In particular, never assume that multiple bus masters can exist on the
> same
> > backplane.
> >
> > I fought that battle with a Solbourne.  Conclusion: it was fine to add in
> one of
> > our peripheral boards but that was it.  They had never even implemented
> > the hard parts of the spec.
> >
> > mcl
>
>
> I think the only use I ever saw for the slot in the Atari TT was for Video
> cards. My TT had one, but it needed extra software to drive it...
>
> Dave
>
>

Re: Decmate Owner's Guide (or equivalent experience)

[Brent Hilpert]

On 2015-Oct-17, at 10:58 AM, David Gesswein wrote:
> On Fri, Oct 16, 2015 at 09:40:37PM -0700, Brent Hilpert wrote:
>> 
>> Pressing 2 & 3 do something, 2 causes the system to go away - presumably 
>> looking for the disks; 3 causes a flashing cursor/underbar across the 
>> screen - presumably the 'print screen' scan, 
>> other operations don't work.
>> 
> I take it 9 to enter local then the setup key to exit setup where you
> then get local echo of keys on the CRT doesn't work.


IIRC pressing 9 does not switch the LEDs from ONLINE to LOCAL as the doc says 
it should.
We should try exiting setup at that point to see if we get local echo 
regardless (the hardware is at Rob's place at the moment so I can't check 
immediately.)

Also IIRC, after pressing 2, "SETUP" disappears as it should, however there is 
no boot message, but CTL-SETUP does get us back to SETUP mode.

The reason I want to check the keyboard communication/scanning is because is 
because in addition to the above where some keys seem to do what is expected 
while others don't, 3 keys out of all of them (?, M & SPACE) do not produce 
keyclicks.

Re: Decmate Owner's Guide (or equivalent experience)

[David Gesswein]

On Fri, Oct 16, 2015 at 09:40:37PM -0700, Brent Hilpert wrote:
> 
> Pressing 2 & 3 do something, 2 causes the system to go away - presumably 
> looking for the disks; 3 causes a flashing cursor/underbar across the 
> screen - presumably the 'print screen' scan, 
> other operations don't work.
>
I take it 9 to enter local then the setup key to exit setup where you
then get local echo of keys on the CRT doesn't work.

Data General NOVA 4/C help

[Henk Gooijen]

I picked up the NOVA 4 last Thursday. I had help carrying all the stuff
(disassembled) downstairs from the attic. At home I had to unload the van
single-handed. Went well, although I felt my back that evening ...

Today, I cleaned the rack, as all boxes were still on the floor. There
was little dust, the machine was well taken care of.
After the cleaning I mounted the hard disk drive on the slides. The hard
drive is a model 6101-S2 (12.5 MB fixed disk). On the top plate of the
hard disk is an 8" Qume floppy disk drive mounted. The hard disk and
the floppy disk form one unit, never seen this construction before!
The colored twisted-pair flatcable from the floppy drive goes to the
hard disk and another colored twisted-pair flat cable goes to the
NOVA 4/C computer, connecting on a paddle board using an edge connector.

See my website: www.pdp-11.nl/dg/nova4/nova4.html 


After everything was connected I applied mains. The fans start to run,
so far so good. Then I switch on the NOVA and then the hard disk unit.
The POWER LED on the NOVA and on the hard disk is lit. I can hear the
hard disk "hum", and when the humming sound stops after a few seconds
the READY LED is lit.
However, when I press RESET on the NOVA and then PR.LOAD, the READY LED
on the disk flashes momentarily (brief), but nothing further happens.

On the disk drive are (behind the panel) two small switches. One has
the text "NORM" and "PROT", the other has several texts (forgotten),
but with that switch you can set the hard disk as device 0 and the
floppy drive device 1, or the hard disk as device 1 and the floppy
disk as device 0. Basically you can set the boot device, as the machine
starts from device 0. I have this from the accompanying documentation.

When I put that switch in the other position and press RESET and then
PR.LOAD on the NOVA, the floppy disk LED is lit for a few seconds,
but I do not hear a head load ("clunk"), nor head stepping sounds.
Of course, the floppy drive is loaded with a floppy disk. The label
on the floppy says "opstart" (Dutch for start up). As the floppy disk
access LED turn on, I guess that I can say that the NOVA itself is OK.

As far as I know, I have the BERG connector put back on the pins
where it was before I did the disassembly. That cable connects to the
terminal. The question might be whether it was on the correct pins
for starters. I do not get any character(s) on the Dasher D200 terminal
that came with the system. For that reason, I assume that the terminal
settings match the settings for the NOVA.

One more remark. On the hard disk is a red label glued. The text on
it says "remove 2 shipping brackets before operating unit unlock
pivot arm (see over)". On the rear side of the label is a drawing
that shows the "front left corner". At the side is a screw (???) to
lock/unlock the head(s). However, I just don't understand the drawing
and cannot localize that screw.
I mailed the previous owner whether he remembers something ...

Anybody has info on the 6101-S2 disk drive? A drawing of those
shipping rackets, and more info about head locks?

Thanks,
- Henk

Re: Data General NOVA 4/C help

[Bruce Ray]

I will reply off-list as usual...

Bruce


On 10/17/2015 2:16 PM, Henk Gooijen wrote:

I picked up the NOVA 4 last Thursday. I had help carrying all the stuff
(disassembled) downstairs from the attic. At home I had to unload the van
single-handed. Went well, although I felt my back that evening ...

Today, I cleaned the rack, as all boxes were still on the floor. There
was little dust, the machine was well taken care of.
After the cleaning I mounted the hard disk drive on the slides. The hard
drive is a model 6101-S2 (12.5 MB fixed disk). On the top plate of the
hard disk is an 8" Qume floppy disk drive mounted. The hard disk and
the floppy disk form one unit, never seen this construction before!
The colored twisted-pair flatcable from the floppy drive goes to the
hard disk and another colored twisted-pair flat cable goes to the
NOVA 4/C computer, connecting on a paddle board using an edge connector.

See my website: www.pdp-11.nl/dg/nova4/nova4.html
After everything was connected I applied mains. The fans start to run,
so far so good. Then I switch on the NOVA and then the hard disk unit.
The POWER LED on the NOVA and on the hard disk is lit. I can hear the
hard disk "hum", and when the humming sound stops after a few seconds
the READY LED is lit.
However, when I press RESET on the NOVA and then PR.LOAD, the READY LED
on the disk flashes momentarily (brief), but nothing further happens.

On the disk drive are (behind the panel) two small switches. One has
the text "NORM" and "PROT", the other has several texts (forgotten),
but with that switch you can set the hard disk as device 0 and the
floppy drive device 1, or the hard disk as device 1 and the floppy
disk as device 0. Basically you can set the boot device, as the machine
starts from device 0. I have this from the accompanying documentation.

When I put that switch in the other position and press RESET and then
PR.LOAD on the NOVA, the floppy disk LED is lit for a few seconds,
but I do not hear a head load ("clunk"), nor head stepping sounds.
Of course, the floppy drive is loaded with a floppy disk. The label
on the floppy says "opstart" (Dutch for start up). As the floppy disk
access LED turn on, I guess that I can say that the NOVA itself is OK.

As far as I know, I have the BERG connector put back on the pins
where it was before I did the disassembly. That cable connects to the
terminal. The question might be whether it was on the correct pins
for starters. I do not get any character(s) on the Dasher D200 terminal
that came with the system. For that reason, I assume that the terminal
settings match the settings for the NOVA.

One more remark. On the hard disk is a red label glued. The text on
it says "remove 2 shipping brackets before operating unit unlock
pivot arm (see over)". On the rear side of the label is a drawing
that shows the "front left corner". At the side is a screw (???) to
lock/unlock the head(s). However, I just don't understand the drawing
and cannot localize that screw.
I mailed the previous owner whether he remembers something ...

Anybody has info on the 6101-S2 disk drive? A drawing of those
shipping rackets, and more info about head locks?

Thanks,
- Henk

Re: Data General NOVA 4/C help

[Rod Smallwood]

Whilst I have no experience of DG systems I am familar with drives of 
that era.
The red label is important. If you did not put the shipping locks in we 
must assume it travelled without.

Thats not good. If the journey was not too bumpy then you may be ok.

I have seen floppy drives with shipping locks but its not usual. So the 
floppy drive might be a good place to start.  The drive may be fine but 
disks do not last forever. I would want to be sure the actual disk was ok.



Does it have any kind of power on self test?

As it appears that system does not boot nor do you get any out put on a 
terminal.
(You do have a terminal  attached) perhaps a good  mechanical check of 
the floppy drive.

Things like belts and rubber components are worth a look.

Rod



On 17/10/2015 21:16, Henk Gooijen wrote:

I picked up the NOVA 4 last Thursday. I had help carrying all the stuff
(disassembled) downstairs from the attic. At home I had to unload the van
single-handed. Went well, although I felt my back that evening ...

Today, I cleaned the rack, as all boxes were still on the floor. There
was little dust, the machine was well taken care of.
After the cleaning I mounted the hard disk drive on the slides. The hard
drive is a model 6101-S2 (12.5 MB fixed disk). On the top plate of the
hard disk is an 8" Qume floppy disk drive mounted. The hard disk and
the floppy disk form one unit, never seen this construction before!
The colored twisted-pair flatcable from the floppy drive goes to the
hard disk and another colored twisted-pair flat cable goes to the
NOVA 4/C computer, connecting on a paddle board using an edge connector.

See my website: www.pdp-11.nl/dg/nova4/nova4.html
After everything was connected I applied mains. The fans start to run,
so far so good. Then I switch on the NOVA and then the hard disk unit.
The POWER LED on the NOVA and on the hard disk is lit. I can hear the
hard disk "hum", and when the humming sound stops after a few seconds
the READY LED is lit.
However, when I press RESET on the NOVA and then PR.LOAD, the READY LED
on the disk flashes momentarily (brief), but nothing further happens.

On the disk drive are (behind the panel) two small switches. One has
the text "NORM" and "PROT", the other has several texts (forgotten),
but with that switch you can set the hard disk as device 0 and the
floppy drive device 1, or the hard disk as device 1 and the floppy
disk as device 0. Basically you can set the boot device, as the machine
starts from device 0. I have this from the accompanying documentation.

When I put that switch in the other position and press RESET and then
PR.LOAD on the NOVA, the floppy disk LED is lit for a few seconds,
but I do not hear a head load ("clunk"), nor head stepping sounds.
Of course, the floppy drive is loaded with a floppy disk. The label
on the floppy says "opstart" (Dutch for start up). As the floppy disk
access LED turn on, I guess that I can say that the NOVA itself is OK.

As far as I know, I have the BERG connector put back on the pins
where it was before I did the disassembly. That cable connects to the
terminal. The question might be whether it was on the correct pins
for starters. I do not get any character(s) on the Dasher D200 terminal
that came with the system. For that reason, I assume that the terminal
settings match the settings for the NOVA.

One more remark. On the hard disk is a red label glued. The text on
it says "remove 2 shipping brackets before operating unit unlock
pivot arm (see over)". On the rear side of the label is a drawing
that shows the "front left corner". At the side is a screw (???) to
lock/unlock the head(s). However, I just don't understand the drawing
and cannot localize that screw.
I mailed the previous owner whether he remembers something ...

Anybody has info on the 6101-S2 disk drive? A drawing of those
shipping rackets, and more info about head locks?

Thanks,
- Henk

Oddball floppies for trade - 8", HS (outer edge), weird cutout

[Jay West]

I have two "flippy organizers" (that's around 20 floppies each) full of
these oddball floppies.

Picture at
https://www.flickr.com/photos/131070638@N02/22020178558/in/dateposted/

They are 8", hard sectored, and the sectors are on the outer edge rather
than the hub, and there is an odd cutout on one edge that goes inside the
drive.

I know I don't have a machine that uses these, so they are available for
trade.

J

Re: Oddball floppies for trade - 8", HS (outer edge), weird cutout

[Chuck Guzis]

On 10/17/2015 04:21 PM, Jay West wrote:

I have two "flippy organizers" (that's around 20 floppies each) full
of these oddball floppies.

Picture at
https://www.flickr.com/photos/131070638@N02/22020178558/in/dateposted/

 They are 8", hard sectored, and the sectors are on the outer edge
rather than the hub, and there is an odd cutout on one edge that goes
inside the drive.

I know I don't have a machine that uses these, so they are available
for trade.


Memorex 651 floppies:

http://bitsavers.informatik.uni-stuttgart.de/pdf/memorex/disc/651.60-05_651floppyOEM.pdf

--Chuck

RE: Oddball floppies for trade - 8", HS (outer edge), weird cutout

[dwight]

I think it was Wang that used the outside holes.
Dwight

 
> Subject: Re: Oddball floppies for trade - 8", HS (outer edge), weird cutout
> To: cctalk@classiccmp.org
> From: ccl...@sydex.com
> Date: Sat, 17 Oct 2015 16:30:16 -0700
> 
> On 10/17/2015 04:21 PM, Jay West wrote:
> > I have two "flippy organizers" (that's around 20 floppies each) full
> > of these oddball floppies.
> >
> > Picture at
> > https://www.flickr.com/photos/131070638@N02/22020178558/in/dateposted/
> >
> >  They are 8", hard sectored, and the sectors are on the outer edge
> > rather than the hub, and there is an odd cutout on one edge that goes
> > inside the drive.
> >
> > I know I don't have a machine that uses these, so they are available
> > for trade.
> 
> Memorex 651 floppies:
> 
> http://bitsavers.informatik.uni-stuttgart.de/pdf/memorex/disc/651.60-05_651floppyOEM.pdf
> 
> --Chuck