Later Data General (D214/AViiON) keyboards?

No, I'm not looking for old Dasher keyboards because "omg Severance." I have a couple of Data General terminals (D214) and a couple of Data General UNIX workstations (AViiON, using m88k CPU) and only one keyboard. The one that uses an 8-pin DIN connector similar to the 5-pin IBM PC XT keyboard

Re: Using tu58fs with RT11 5.7

On 5/5/22 8:30 PM, Douglas Taylor via cctalk wrote: I wanted to try using tu58fs with a RT11 system running version 5.7 to transfer files in/out. To my surprise RT11 5.7 retired the DD: device, a DD.MAC file is there, but it is unsupported. (1) How do you compile a device driver file?  How

Using tu58fs with RT11 5.7

I wanted to try using tu58fs with a RT11 system running version 5.7 to transfer files in/out. To my surprise RT11 5.7 retired the DD: device, a DD.MAC file is there, but it is unsupported. (1) How do you compile a device driver file?  How do you link and install it? (2) Has anyone done

Re: PCI floppy controller

On 5/5/22 17:44, Charles Dickman wrote: > On Thu, Apr 21, 2022 at 10:34 PM Chuck Guzis > wrote: > > On 4/21/22 18:01, Charles Dickman wrote: > > On Thu, Apr 21, 2022 at 8:02 PM Chuck Guzis via cctal > > I was at that point and looking at DP3T switches to have

Re: PCI floppy controller

On Thu, Apr 21, 2022 at 10:34 PM Chuck Guzis wrote: You could also bring the floppy cable out to a standard DC-37 connector on a bracket, then use a ABCD switchbox to select whatever external DC-37-cabled floppy drive you wanted. On Thu, 5 May 2022, Charles Dickman via cctalk wrote: Where

Re: PCI floppy controller

On Thu, Apr 21, 2022 at 10:34 PM Chuck Guzis wrote: > On 4/21/22 18:01, Charles Dickman wrote: > > On Thu, Apr 21, 2022 at 8:02 PM Chuck Guzis via cctal > > I was at that point and looking at DP3T switches to have an external > > connection as well. DP3T switches are mess. > > You could also

Re: DEC H7822 power supply

Hi Maciej, > > Right, my notes indicate Nichicon PL parts might be problematic too, e.g. > one at 4700uF/10V on 5V output of the H7826 PSU. > What is H7826 used in? I don't think I have any of those. > > I can confirm now Nichicon PF 47uF/35V parts to be the source of an issue > with my Bel

Re: The TRS-80 Journey Continues

On Thu, 5 May 2022, Fred Cisin via cctalk wrote: Although TRS-DOS didn't (until 6.0?, when TRS-DOS became rebranded LDOS), the after-market OS's supported DS and 80 track. I don't remember how you needed to tell the OS that you had DS or 80 track. But, once the OS knows, then the 55GFR,

Re: The TRS-80 Journey Continues

To test the suspect drive, you could connect it to a PC; with DS1 jumpered (instead of DS0), it should work as a "180K" (single sided "360K"). a PC with a floppy controller? Wow, is that ever retro. Besides FDC (especially for PCI :-), current Windoze doesn't seem to even know about single

Re: The TRS-80 Journey Continues

The Teac FD-55GFR is a 96tpi drive.?? It can replace a 55G (1.2M), or a 55F (720K) depending on controller, but it still has a narrow head for doing 80 tracks. It will have to be jumpered to run at 300RPM, not 360. On Thu, 5 May 2022, Bill Gunshannon via cctalk wrote: It has a jumper that

Re: The TRS-80 Journey Continues

On 5/5/22 17:12, Fred Cisin via cctalk wrote: Double sided drives in 4P shouldn't require anything more than software patches, to tell the OS (TRS-DOS, CP/M, etc.) that you have and want to use the other side. The Model 3 and 4 disk controller (did the 4P use the same one??) supports double

Re: The TRS-80 Journey Continues

On 5/5/22 16:50, Mike Katz via cctalk wrote: If you use a 80 track (96 TPI) 5 1/4" drive to read 40 track (48 PTI) floppies that will work but if you write onto them they will not be readable in a 40 track drive any more.   The reason for this is that the had is half the width and when the 80

Re: The TRS-80 Journey Continues

On 5/5/22 16:28, Fred Cisin via cctalk wrote: Next step... Apparently mu original Tandon floppy has bought the farm. Does anyone know what the jumper setting are for a TEAC FD-55GFR-149 for the TRS-80 4P? I tried the usual (like for a DEC RX-33) but that didn't fly.  Every sector fails verify

Re: The TRS-80 Journey Continues

On Thu, 5 May 2022, Bill Gunshannon via cctalk wrote: On 5/5/22 13:34, Mike Loewen via cctalk wrote: On Thu, 5 May 2022, Bill Gunshannon via cctalk wrote: Next step... Apparently mu original Tandon floppy has bought the farm. Does anyone know what the jumper setting are for a TEAC

Re: The TRS-80 Journey Continues

Double sided drives in 4P shouldn't require anything more than software patches, to tell the OS (TRS-DOS, CP/M, etc.) that you have and want to use the other side. The Model 3 and 4 disk controller (did the 4P use the same one??) supports double sided and uses pin32 as side select (as deity

Re: Different font for second 1 on commodore 1571 drives (and others)

> On May 5, 2022, at 4:53 PM, Toby Thain via cctalk > wrote: > > On 2022-05-05 1:43 p.m., John Robertson via cctalk wrote: >> On 2022/05/05 10:26 a.m., Toby Thain via cctalk wrote: >>> On 2022-05-05 1:03 p.m., John Herron via cctalk wrote: Someone at work pointed this out and I've never

Re: HP9825 internal ROM?

Curious Marc has a complete set of YouTube videos on his restoration of the HP 9825, due to Power Supply failure (no crowbar) damaging a number of ICs. The Last video of the series shows fabricated of the PC Board for it’s missing Crowbar Circuit. https://youtu.be/gIfJ30fPAOw HP 9825 Crowbar

Re: Different font for second 1 on commodore 1571 drives (and others)

On 2022-05-05 1:43 p.m., John Robertson via cctalk wrote: On 2022/05/05 10:26 a.m., Toby Thain via cctalk wrote: On 2022-05-05 1:03 p.m., John Herron via cctalk wrote: Someone at work pointed this out and I've never really thought about it. Is anyone here aware of the decision or reason to use

Re: The TRS-80 Journey Continues

If you use a 80 track (96 TPI) 5 1/4" drive to read 40 track (48 PTI) floppies that will work but if you write onto them they will not be readable in a 40 track drive any more.   The reason for this is that the had is half the width and when the 80 track drives writes to a 40 track written

Re: The TRS-80 Journey Continues

Next step... Apparently mu original Tandon floppy has bought the farm. Does anyone know what the jumper setting are for a TEAC FD-55GFR-149 for the TRS-80 4P? I tried the usual (like for a DEC RX-33) but that didn't fly.  Every sector fails verify after a format.  I am sure it's a jumper thing.

Re: The TRS-80 Journey Continues

On 5/5/22 13:34, Mike Loewen via cctalk wrote: On Thu, 5 May 2022, Bill Gunshannon via cctalk wrote: Next step... Apparently mu original Tandon floppy has bought the farm. Does anyone know what the jumper setting are for a TEAC FD-55GFR-149 for the TRS-80 4P? I tried the usual (like for a

Re: Different font for second 1 on commodore 1571 drives (and others)

On 2022/05/05 10:26 a.m., Toby Thain via cctalk wrote: On 2022-05-05 1:03 p.m., John Herron via cctalk wrote: Someone at work pointed this out and I've never really thought about it. Is anyone here aware of the decision or reason to use a different 1 character for the last 1 vs the first 1?

Re: The TRS-80 Journey Continues

On Thu, 5 May 2022, Bill Gunshannon via cctalk wrote: Next step... Apparently mu original Tandon floppy has bought the farm. Does anyone know what the jumper setting are for a TEAC FD-55GFR-149 for the TRS-80 4P? I tried the usual (like for a DEC RX-33) but that didn't fly. Every sector

Re: Different font for second 1 on commodore 1571 drives (and others)

On 2022-05-05 1:03 p.m., John Herron via cctalk wrote: Someone at work pointed this out and I've never really thought about it. Is anyone here aware of the decision or reason to use a different 1 character for the last 1 vs the first 1? Got a picture?

Different font for second 1 on commodore 1571 drives (and others)

Someone at work pointed this out and I've never really thought about it. Is anyone here aware of the decision or reason to use a different 1 character for the last 1 vs the first 1?

Re: The TRS-80 Journey Continues

Next step... Apparently mu original Tandon floppy has bought the farm. Does anyone know what the jumper setting are for a TEAC FD-55GFR-149 for the TRS-80 4P? I tried the usual (like for a DEC RX-33) but that didn't fly. Every sector fails verify after a format. I am sure it's a jumper

Re: IBM 3725 MOSS cpu

Dave McGuire would know this. I can look it up if no one else knows off the top of their head... Bil On Thu, May 5, 2022 at 12:10 PM IBM System/3 via cctalk wrote: > > Hi, > > Has anyone any information of the type CPU IBM used for the MOSS > function in the IBM 3720/3725 ? > > Thanks ! > >

IBM 3725 MOSS cpu

Hi, Has anyone any information of the type CPU IBM used for the MOSS function in the IBM 3720/3725 ? Thanks ! Henk

Re: DEC H7822 power supply

Hi Peter, > I still have the leaky electrolytics I removed from the POWER-ONE PSU in my > Cisco IGS a while back. I stored them with their leads up and goo seems to > be still oozing out of some of them despite their inactivity and orientation. > These ones are marked Nichicon PL(M) 4700uF/63V,