Re: Data General Nova 3 and 6045 Drive Questions

2016-06-12 Thread Mark J. Blair
> On Jun 12, 2016, at 20:55, Bruce Ray wrote: > > G'day Mark - > > Brief notes... Thanks! > 4) 4075 TTY baudrate pretty easy to check; usually 4800 or 9600 baud, 7 data, > even parity, 1 stop bit. I determined earlier today that I had merely had a brain fart regarding

Re: Data General Nova 3 and 6045 Drive Questions

2016-06-12 Thread Bruce Ray
G'day Mark - Brief notes... 1) DG part numbers are 005-xx-yy; 107-xx-yy numbers are circuit board artwork numbers. Unfortunately, there is no standard cross-reference between the two. Briefly, the part number is the primary reference to be used because a single 107-xx-yy

Re: Data General Nova 3 and 6045 Drive Questions

2016-06-12 Thread Mark J. Blair
Disk testing update: I have the controller in slot 11 still, and the drive interface cable is connected to the edge paddle that appears to be wire-wrapped to slot 11. I haven't tried it in slot 10 using edge connector P4 yet, because I think I might need to fiddle with the two blue wires (bus

Re: Data General Nova 3 and 6045 Drive Questions

2016-06-12 Thread Mark J. Blair
> On Jun 12, 2016, at 00:44, Henk Gooijen wrote: > > Just like Mark, it's about time to spend some time on my NOVA3. > I will be following this with interest! Yay! > Were all bulbs on the front panel of your NOVA intact Mark? > Or did/do you also have dead lamps?

Re: Data General Nova 3 and 6045 Drive Questions

2016-06-12 Thread Henk Gooijen
-Oorspronkelijk bericht- From: Mark J. Blair Sent: Sunday, June 12, 2016 8:32 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Data General Nova 3 and 6045 Drive Questions Aha! Now I remember. That Cassette I/O card is mostly unpopulated, and I think it's just

Re: Data General Nova 3 and 6045 Drive Questions

2016-06-11 Thread Mark J. Blair
> On Jun 11, 2016, at 22:00, Bruce Ray wrote: > > DG Model 6045 disk drive heads 0 and 1 are the removable platter, heads 2 and > 3 are the 'fixed' platter. As you said, the controller memory address and > sector/sector/count values are set to 0 by the IORESET pulse, so

Re: Data General Nova 3 and 6045 Drive Questions

2016-06-11 Thread Bruce Ray
DG Model 6045 disk drive heads 0 and 1 are the removable platter, heads 2 and 3 are the 'fixed' platter. As you said, the controller memory address and sector/sector/count values are set to 0 by the IORESET pulse, so a read operation (STRT pulse) will start the reading of the bootstrap into

Data General Nova 3 and 6045 Drive Questions

2016-06-11 Thread Mark J. Blair
My Nova 3/12 system has a 6045 cartridge hard drive, with one fixed platter, one removable platter, and a capacity of 10M. I haven't managed to boot my computer from it yet, and after a long pause, my Nova 3 is requesting another time slice of my attention. I can see in the drive's technical