Victor 9000 / Virus 1 Cable Pinout

HxC Floppy emulator support for all others computers...
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Pdevine
Posts: 3
Joined: Tue Dec 28, 2021 5:14 am

Victor 9000 / Virus 1 Cable Pinout

Post by Pdevine »

Hi there,
I'm attempting to connect an Slim SD HxC Floppy Emulator to a Victor 9000 which uses a modified Tandon TM-104 drive. The Victor does not use an edge connector or connect to any board on the drive, it has wires that directly connect between the drive heads/motors and the victor floppy drive controller board. I have the schematics for both the drive controller as well as the drive, and I'm trying to digest all the connections. I'm working at the edge of my knowledge and would love some feedback.

For example, the Victor shows the stepper motor as connected to pins J13 on it's board as
Screen Shot 2021-12-28 at 10.44.26 AM.png
Screen Shot 2021-12-28 at 10.44.26 AM.png (40.94 KiB) Viewed 453 times
I can see 4 wires connected to those pins which run down to the motor.

The drive schematic shows the same connectors as:
Screen Shot 2021-12-28 at 10.46.28 AM.png
Screen Shot 2021-12-28 at 10.46.28 AM.png (45.05 KiB) Viewed 453 times
Now on the HxC emulator there's a single pin named floppy_step, pin 20, which of these five pins from J13 do I connect to pin 20? I'm guessing that J13 lines 1-4 are all connected in the schematic means they're all electrically connected and I can use any of them. I'd love confirmation of that.

There's a different mismatch with the read/write heads, where the machine has separate pinouts for the upper and lower disk read/write heads with a total of 10 pins, but the HxC only has two pins for writing and reading. These are all separate from the gates and are just the flux signals. Can I cross the HxC pins for the read heads to both the upper/lower heads at the same time? That seems like a mistake. There's a floppy_side pin on the HxC, but no corresponding connector on the Victor side as the sides are on separate wires. Will I need some sort of logic gate converter to wire up the HxC to these connections? I'd love some suggestions if you have them. The schematics I'm looking at are Victor 9000 Schematics. The read / write heads are on page 10.
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Pdevine
Posts: 3
Joined: Tue Dec 28, 2021 5:14 am

Re: Victor 9000 / Virus 1 Cable Pinout

Post by Pdevine »

Picture of the floppy controller board.
IMG_3011.jpeg
IMG_3011.jpeg (124.36 KiB) Viewed 452 times
Also, the drive is this drive, but without the controller board. Tandon TM100-4

Jeff
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Re: Victor 9000 / Virus 1 Cable Pinout

Post by Jeff »

I have studied the Victor 9000 floppy interface some times ago and i don't think that you can directly use an Shugart/PC drive (or SD HxC or Gotek) without some additional interfaces. The victor floppy interface is completely different from all others machines. This is a pure custom design where the motor drivers, heads amplifier, and so on, are directly on the machine floppy controller board.

Pdevine
Posts: 3
Joined: Tue Dec 28, 2021 5:14 am

Re: Victor 9000 / Virus 1 Cable Pinout

Post by Pdevine »

Thanks Jeff, you're confirming my fear that I would have to build some sort of adapter.

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