how much faster than Zorro2 is a Zorro4
From
www.amiga-hardware.com Winner / Zorro IV Busboard:
mFast-Z2 Mode Jumper:
OPEN: Normal mode for all Zorro II slots [DEFAULT]
CLOSED: Double speed for the first two Zorro II slots (upper 2 slots). Caution: This speed only works with cards which are adapted for this mode e.g. Cybervision 3D Mk-II or the Buddha FastZ2
...Which means that in most cases this "Z4" is as slow as Z2.
It is definitely slower than Z3, and it has no DMA.
I have no real data on how much faster this "double" mode really is. I've heard about some problems getting the double mode work at all, however.
[edit: added the last bit]
