Help I.D.ing cards.

[jkeim@unlinfo.unl.edu (james keim)]

Okay, picked up an old unenhanced ][e at a computer
faire/swap meet in Omaha this weekend (thanks for telling me
about the event Carl!) and it came loaded with several
expansion cards.  I am wondering if anyone can help me out
with any of these cards.
 
One is an accelerator card--an "M-c-T SpeedDemon"
It is dated 1984.  Does anyone know what speed this thing
runs?  I _think_ I am seeing four 16k 90milisecond cache ram
chips on it.  There also seems to be a little place for
jumper block on the top of the card, near the keyboard end.
Any ideas what it might be for?  Any ideas if there is a way
to control this thing through software/hardware?  Oh, I did
notice that the card draws a little Apple on the graphics
screen before the Autostart ROM kicks in and the "Apple ]["
appears.
 
There is also a Practical Peripherals Seri-ALL card.  Does
anyone know how to configure its dip-switch settings?
Anything else I should know about this card?
 
There was also a strange card in there that looks to me to be
Hard Disk controller of some kind.  It was in slot 7 (I moved
it to slot 5).  I do not have it hooked up to any device but
when I run Slotscan it identifies the card as:
 
        Semi-intelligent disk Card
        Drive 1 Size: 32773 Blocks (16387K, 16 Meg)
        Drive 2 Size: 32773 Blocks (16387K, 16 Meg)
 
The card has no name or ID printed on it.  The keyboard end
has a 50-pin connector on it with a ribbon cable attached.
The ribbon cable is split somewhere in the middle and it
connected to the top and bottom pins but not the middle pins.
 The ribbon cable snakes around to the back and connects to
something that looks like a 37-pin D connector.  Anyone have
any ideas what this card may be?  I'd like to see if I could use it 
with an old Quantum ELS SCSI drive.

Thanks for the help.

James Keim