On 13 Apr 2012, at 16:43, cctalk-request at classiccmp.org wrote:
>>
> I mean make KryoFlux do what it was designed to do. Whatever that is. I
> assume make perfect images of disks.
>
KryoFlux was designed to deliver unaltered flux data off floppy disks, making it possible to get the lowest read possible. Certain drives or devices, like the 1541, won't spit out what's on the platter, but interpreted data. This means such data can usually be used (if transferred right) for emulation, but it's usually impossible to write back as copy protection mechanisms usually come with ambiguity or other methods that make it impossible to write such data back to disks.
On top of that the 1541 can't read the index, which some protections make use of - when creating a disk. By reading a start mark on track A and then stepping to track B you can try and read a required sequence of data that will be impossible to:
a) read in emulation, unless you tweak the data read and spin it around the virtual index as long as it matches. The reason is you don't know which stepping the drive does when reading the disk at the time you image the disk.
b) write back to disk, unless you have some aid, e.g. a drive equipped with an index so you can time your writes.
There are other things that read back differently (=unaltered or mostly unaltered) through a normal drive.
To fully make use of KryoFlux you will a HD 5.25" floppy drive equipped with a -8 stepping mod so you can read flippy floppy disks. If you go for the more hobbyist approach, you can as well add a fake index mod, and read the flip side with wrong index data.
Here's some more things to read about the problem:
http://forum.kryoflux.com/viewtopic.php?f=3&t=3#p1991
This video explains how to mod a drive...
Part 1: http://www.youtube.com/watch?v=WcqluH7dEj4
Part 2: http://www.youtube.com/watch?v=wGxPGavShcE
Part 3: http://www.youtube.com/watch?v=aW65ynGGiFk
>> Do you want access to the contents of the files, or are you archiving
>> them?
>
> I want to know how to use KryoFlux and make it work with Commodore 1541
> floppies.
As said above, you need a HD 5.25" drive, which usually needs to be modded. Unless you would want to cut open your disk jackets, remove the platter and place it in a jacket with two index holes.
At the moment, KryoFlux will dump C64 disks as .D64 and .D64 with errormap which will allow for using simple protections. More advanced stuff will need .G64 or ultimately .IPF files. .G64 support is being added as I write these lines.
Enjoy.
Christian Bartsch | KryoFlux Products & Services Limited
cb at kryoflux.com | www.kryoflux.com
80 Allington Way | Maidstone | ME16 0HN | United Kingdom
Incorporation at Companies House, Cardiff, Company No. 07370567
Directors: Richard Rayner, Christian Bartsch
On 2012-04-14 00:11, "E. Groenenberg"<quapla at xs4all.nl> wrote:
> Wow, very nice!
>
> Makes me to get more energy in getting the 11/70 running again.
Please do. All running PDP-11s are nice!
> I for one would definitely like to see the ftp& telnet server
> parts. Being able to connect to, from and between 2 machines running
> RSX would be a major feature for this O.S.
Yes. And that will come. And it will be better than TCPware, or other
implementations out there. I have some nice ideas...
> Sure, there is/was TCPWare and I had a demo key, but the tk50 media
> got damaged making that a dead end.
I think the image for TCPware is possible to find on the net. And if you
have a key, then that problem is also solved...
> Just wondering, how 'big' is the http task?
Small. 40 disk blocks. The memory requirements are about 5KW of
instruction and 5KW of data.
But it does use the supervisor RMS library, and the resident BASIC+2
library, so that memory is in addition.
I'm working on some more tweaks to this, which might grow it a little
more, but it's pretty cool already.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On 2012-04-13 16:43, "Rod Smallwood"<rodsmallwood at btconnect.com> wrote:
> Sub zero cool!
> What's the hardware?
MIM (which is also MADAME) is actually an emulated PDP-11/74 running
under E11. Bog standard PC otherwise.
But I'm also running this on a real 11/93 at home, but that machine
don't have a public IP address.
Johnny
>
> Regards
> ?
> Rod Smallwood
> ?
> ?
>
> -----Original Message-----
> From:cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
> On Behalf Of Johnny Billquist
> Sent: 13 April 2012 13:40
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Web server running on RSX-11M-PLUS
>
> Ok. I just thought I'd stir some interest and just general noise by
> announcing that I've written a small web-server running under RSX.
> It's written in BASIC+2, and uses the TCP/IP stack for RSX that I've
> also written. There are probably a bunch of bugs and issues still
> around, so I'm happy to take any bug reports, comments or whatever.
>
> The url ishttp://madame.update.uu.se/, and if anyone is curious about
> the code, it's at mim.update.uu.se (same machine, other IP), under
> MIM::DU:[HTTPD]WWW.B2S (also on HECnet)
>
> If people have any interest in this stuff, or something else/more, I'm
> interested in hearing about it. The TCP/IP stack will eventually (soon)
> be available for others to download and use, and apart from the web
> server, I've also written a telnet client, and a few small services
> under TCP, as well as some tools for administration. I have some
> polishing to do, I need to finish a DNS resolved, and I'd like to also
> finish FTP and a telnet server, but I might be open to distributing
> things before I've finished all those things, especially if someone is
> interested in helping writing stuff.
>
> I have interfaces completed for BASIC+2, PDP-11 C, Macro-11. FORTRAN 77
> should also work, but I haven't tried it yet.
>
> This all runs under RSX-11M-PLUS V4.6, but I think it should be possible
> to get running under almost any M+ version, but there might be some
> hacking needed for some versions.
> It will not work under 11M, and I never expect it to. One or two drivers
> as well as one or two tools really are big enough that I need to use the
> split I/D space feature in M+. Rewriting stuff to not need that is way
> too much work.
>
> Johnny
>
> -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email:
> bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay
> hip" - B. Idol
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Guys Last chance on this TRS-80 Magazines and books, enough to fill the
back of a small car.
Its free if you come to my door to get it, Otherwise its headed to the
trash monday.
Steve Landon
Flushing MI
Is anyone here aware of a gizmo that will let me plug a USB mouse into an
ADB socket? I'm trying to come up with a way to shoehorn modern optical
mouse guts into a classic Macintosh mouse.
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
Hello, especially to people on the west coast -- because it's 2:16AM ET
right now -- I've got a vintage computer image that for which I need
some GIMP or Photoshop assistance; any experts out there tonight? If so,
then please email me directly, or better yet call me -- 646-546-9999 --
I'll be up until about midnight PT / 3am ET. Thanks!! - Evan
Is there any kind of sensible maximum limit for the number of directory
entries that a CP/M disk may contain? Or did every vendor just do their own
thing (probably!) and it's preferable to just keep parsing from the start
of the directory area until either the end of the media is reached, or a
location identified as file data by a previous entry is encountered?
And, related to that, if the directory area of a CP/M disk spans multiple
tracks, was there a standard for whether it iterated head-first (in the
event of media with multiple heads) or cylinder-first? Or does code have to
cope with both possibilities?
I'm just pulling some data off some QX-10 floppies (none of which seem to
take up more than a track for the directory area), but it seems like a good
idea to make it as generic as possible.
cheers
Jules
On 14 Apr 2012, at 00:11, cctalk-request at classiccmp.org wrote:
> If "flippies" are the only problem, . . .
> There IS enough flexibility and slack in the jacket to be able to
> CAREFULLY punch the other jacket holes (one on each side) without
> disassembly, using a very ordinary handheld hole punch. My first retail
> product "Berkeley Microcomputer Flip-Jig" was a plexiglass pocket jig for
> marking the positions of where to punch. The "deluxe" version, and the
> 8" versions, also had a jig for installing center hole re-inforcers.
Fred,
yes, the index hole is the only real problem. Tell a collector to punch his disks and then start running... :-)
Good luck.
Christian Bartsch | KryoFlux Products & Services Limited
cb at kryoflux.com | www.kryoflux.com
80 Allington Way | Maidstone | ME16 0HN | United Kingdom
Incorporation at Companies House, Cardiff, Company No. 07370567
Directors: Richard Rayner, Christian Bartsch
