test-drb July 2006

test-drb@ccmp.vtda.org

204 participants
377 discussions

*early* Domain OS available? ---> 8" floppy with Imagedisk

by gkaufman＠the-planet.org

> From: Jules Richardson <julesrichardsonuk at yahoo.co.uk> > Subject: Re: *early* Domain OS available? > > > Al Kossow wrote: > >>> The floppy drive appeared to be a standard PC style 5 1/4" drive. >>> >> It would be a good thing to try Imagedisk on these to try to get the >> software archived. >> >> I've had pretty good luck with reading 5" floppies. 8" is another story... >> > > Hmm, good point - I had 'floppy-based' stuck in my head and completely missed > that the fax we've got says that they're 8". That suggests it's a pretty early > Apollo and well before the 3000 or 4000 series. > > At least if they're 8" disks then the recording density is pretty low and so > there's a good chance they're intact. OTOH, I've never tried hooking up an 8" > drive to a modern machine (i.e. PC) and tried Imagedisk (for example) with it. I've used a Shugart 801R with Imagedisk, and it works very nicely. I laid out a small pcb to simplify the connections and could have more made up if there were any interest. Dave Dunfield was invaluable in helping me work thru issues getting single density to work properly. I ended up with an Adaptec ISA scsi adapter card for the floppy controller which works well (it's a 1522a). - Gary

18 years, 5 months

Tandy model 16 help needed - Shoreline, Washington

by kelly＠catcorner.org

Anyone real knowledgeable with these units interested in helping somone out? I know a guy that has a bunch of records on model 16 disks that he can't access. A "consultant" has hosed every copy of the program he used to access them with. Might be a real problem to fix. The guy is over 80 years old, and a little hard to converse with over the phone. Kelly

18 years, 5 months

*early* Domain OS available?

by aek＠bitsavers.org

> I forget how SCSI and the tape drives were connected The tape drives are QIC-02, with a separate ISA card just for tape.

18 years, 5 months

Open Tape Reader design

by aek＠bitsavers.org

>> Interesting, Al! Will your design work without a head change for 7 track >> tape? If not, how have you decided to handle 7 track tape? > > 7 tracks will require a new head. I have combo 7/9 track heads, and I've > verified that at least 7 of the 18 tracks of a 3480 stack land in 7 track > widths. John claims he's read 9 tracks on a 3480 stack, but that may be > marginal on some tracks, according to my measurements. The SAXO USB/FPGA board arrived yesterday, and the designer didn't bother to bring any of the USB chip's unused I/O out to vias, so the analog board will have to have a PCA9555 16 bit I2C I/O chip on it to control the I2C chip enables on the TZA1000s. The PCA9555 also provides 7 extra low speed I/Os for bit fiddling on the analog board. It occurred to me over the last day or two that it would be simple to also make this a "USB Catweasel", so when I lay out the analog board, I'll put buffering on it for a 50 and 34 pin floppy connector and run them over to some of the unused pins on the FPGA. It might even be possible to take one of the analog inputs and tap onto the preamp output of a floppy and bypass the data separator on the drive, capturing analog flux transitions from the head directly. This may make it possible to recover data from marginal media that can't get through the drive's data separator.

18 years, 5 months

Look for okidata 9pin dotmatrix printer with rs232 port

by dm561＠torfree.net

---------------Original Messages: From: Henry Ji <ying6926 at ureach.com> Subject: Look for okidata 9pin dotmatrix printer with rs232 port I am looking for okidata 9pin dotmatrix printer with rs232 port or fujitsu equivalent. Any information would be appreciated. Henry ------------------------------ From: Bert Thomas <bert at brothom.nl> Subject: Re: Look for okidata 9pin dotmatrix printer with rs232 port Henry Ji wrote: > I am looking for okidata 9pin dotmatrix printer with rs232 port > or fujitsu equivalent. Any information would be appreciated. I may able to arrange one, or just the serial interface board. Where are you located? ====================Reply: I also have some printers & RS232 boards. OKIs are pretty heavy to ship though; where are you and which model(s) are you interested in? mike

18 years, 5 months

looking for 3 QBUS SCSI testers that have $ to spend

by vax9000＠gmail.com

Please read http://www.mscpscsi.com/tester.html for details. Thank you! vax, 9000

18 years, 5 months

Macintosh question (G3, 7 years old, so OT)

by ethan.dicks＠gmail.com

A quick question about the Mac G3, if you'll forgive it being not yet on-topic. Feel free to reply off-list to avoid rampant topic drift... Does anyone here know about the internals of the G3 line? I have a motherboard in front of me that I'm attempting to see if it will work. It came from a machine that had already been stripped, so there's no guarantee the hardware is functional. With the Apple Reset/NMI board installed, and RAM, and the Apple-enhanced ATI Rage 128 video card, I've attempted to see if it works by plugging in a PC ATX power supply and pressing the "power on" button on the motherboard and on the Reset/NMI board. I get a brief green flash from several LEDs, but the PSU doesn't kick on the fan, and the machine does not appear to be starting. Do I need an Apple ATX supply to test this? Could this be a battery problem? (the battery was completely dead and I have no handy replacement, so the battery compartment is empty) Do I need to have a keyboard and mouse plugged in to get a response? Thanks for any tips. -ethan

18 years, 5 months

big iron DASD and tape free for prompt pickup

by aek＠bitsavers.org

> Note that the above drive is able to read 7-track and 9-track tapes Brian should be able to verify that by looking at the head stack. I'm skeptical, though.

18 years, 5 months

Open Tape Reader design

by aek＠bitsavers.org

> Interesting, Al! Will your design work without a head change for 7 track > tape? If not, how have you decided to handle 7 track tape? 7 tracks will require a new head. I have combo 7/9 track heads, and I've verified that at least 7 of the 18 tracks of a 3480 stack land in 7 track widths. John claims he's read 9 tracks on a 3480 stack, but that may be marginal on some tracks, according to my measurements.

18 years, 5 months

Open Tape Reader design

by aek＠bitsavers.org

After several years of frustration, here is the initial design document for a magnetic tape reader with the explicit goal of being a completely open design. http://bitsavers.org/tools/USBTapeInterface2006.txt

18 years, 5 months

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test-drb July 2006