that is pretty remarkable. MFM is an early way that drives communicated with the controller. I believe the controller was the thing that determined the drive's way on how to access the disks, not the drive board itself.
At college, when I was taking my hardware classes, they have a 14" platter drive there that used dual arm heads, and required dual MFM controllers. if you didn't, you only accessed half the drive. The controllers would communicate through a second bridgeboard, that would then plug into the early ISA slots on the old computers (XTs/PC Jrs.)
If you used a 20MB and lower drive, it didn't require the extra controller, but the second one was so that it could access every other platter (one drive accessed one platter, then next would access the next, and so on)
The hard drive was amazing! it has 5 platters and totalled 70MB!!! it was used in the server systems out at FDR (first data Resources, they work with credit card numbers and stuff)
Anyways, i LOVE old stuff. Was this kit made for the 512?
At college, when I was taking my hardware classes, they have a 14" platter drive there that used dual arm heads, and required dual MFM controllers. if you didn't, you only accessed half the drive. The controllers would communicate through a second bridgeboard, that would then plug into the early ISA slots on the old computers (XTs/PC Jrs.)
If you used a 20MB and lower drive, it didn't require the extra controller, but the second one was so that it could access every other platter (one drive accessed one platter, then next would access the next, and so on)
The hard drive was amazing! it has 5 platters and totalled 70MB!!! it was used in the server systems out at FDR (first data Resources, they work with credit card numbers and stuff)
Anyways, i LOVE old stuff. Was this kit made for the 512?