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I forgot I had an HP 1630D. It's working well. Just can't power it off cause I can't save my configuration. But at least I can take a photo of the screen in case of accidental power off. Board is up and running now. Had to replace one of the decoder chips as well as the 6800.

Hi, I have a project to bring up a prototype Atari pinball board that uses a 6800. Using a Saleae logic 16 I've been able to see it come out of reset and then clear a bunch of ram but then seems to get lost after I believe it is jsr to a routine. Thanks to Al, who dumped the proms and provided...

I feel all the pain. Sheesh I have a project just to keep track of my projects. Walking around the house, the backyard, the garages I remember projects I've put aside for one reason or another. (Not even going to mention the 4800 sqft warehouse which probably reveals 2 or more stashed projects...

The only disk drives I have left are rack mounted drives.

Does it make sense to put an HSC70 in with this collection?

I guess I'll need to try to figure what boards are missing.

Will also include lots of DEC documentation

Not sure how to price this. I have three main wide complete cabinets and 4 tape drivers for a total of 7 cabinets. Plus a bunch of extra KL10 boards. Plus whatever cables I can find for these units. These are located in my warehouse in San Carlos, CA. 94070 I've pushed the cabinets to new places...

Hi all, II have some assembly code that runs a pinball game that I would like to assemble and create a new set of roms for the game. The pinball game is called Space Riders, made by Atari in 1978. Here is snippet of the code: .ASECT .RADIX 16 .SBTTL RAM ALLOCATION ;*DISPLAY...

I've created an exhibit for VCF West that explains the actual facts of the creation of the expansion architecture for the A1000 and how Autoconfig, Zorro, Ranger, and third party peripherals like Byte By Byte's Pal/ Pal Jr fit in. Showing: A working Zorro/Ranger prototype backplane plugged into...

I mean half height, not half a drive.

So far the two that I have tested have crash problems. Was able to scrape most of the data from one 20M drive, Most of the errors were on the inner cylinders. On the second drive one whole surface was unreadable. This might not be a surface problem so I'm going to save that drive for looking at...

and sold

It is 41 lbs.

Here is an incomplete Chassis. Has front bezel, power supply, an interface card, backplane. Prefer local pickup, but could package and ship for extra $ Weighs maybe 30 lbs. Located in San Carlos, CA 94070

Includes 872D power controller. Nice working casters. At warehouse in San Carlos, CA 94070

Found the ones I needed.

Thanks for the link to the spec. There are no commands to query geometry. It appears that a controller can get cylinder count by setting cylinder address and seeing if it reports error. It can get sector count by counting pulses between index pulses. Head selection though doesn't seem to have a...

I'll look to see what controllers might be installed. Maybe this is nieve but does the SMD spec support a geometry query? The tester that I borrowed only has preprogrammed drive specs for older drives. And it doesn't seem to allow me to edit them. I'm able to get the tester to do some basic...

Correction: "several SMD drivers" should be "several SMD drives"