Hi All,
I have an original Dreamdisk V3 PCB - this was an upgrade from the original Dreamdisk V2 (which has been copied with a new design).
The V3 Dreamdisk added RTC and a HDC interface to the FDC. The Z80 50 PIN BUS pinout is Microbee and not Sorcerer. An external "adapter" PCB is required to remap the Z80 bus signals from Microbee to Sorcerer.
Appropriate circuits are provided on the Dreamdisk V3 controller board to modify the Z80 signals for use by a Western Digital 1002-05 hard disk controller board (ST-506 hard disk interface).
http://www.bitsavers.org/pdf/westernDig ... _Jul83.pdf
The Dreamdisk V3 PDF user manual is available here.
https://exidysorcerer.net/?r=/download& ... bC5wZGY%3D
