[comp.os.cpm] Apple Z80 hardware

rzh@ICF.LLNL.GOV (R. Hanscom) (12/27/90)

Hello All --

I'm the proud (?) owner of some surplus Z80 boards that look like they
have connectors for the Apple bus on them.  There was no documentation
available, and I'm wondering if any of you Apple CP/Mers might be able
to help identify them.  They are marked "Advanced Logic Systems".  There
is a "Z80 Card" that is a Z80B and little else but some interface chips
and a small PROM/ROM(?).  It does not even have an on-board clock that I
can see.  Also I have a "CP/M Card" from the same vendor.  It is unpopulated,
but looks like it would have memory, a crystal, etc.  There are no component
values or IC id's on the silk screen.  Can somebody tell me if they are
useful, or if there is documentation available for them??

           roger             icf!rzh@lll-winken.llnl.gov
                               rzh@phoenix.ocf.llnl.gov

wilker@gauss.math.purdue.edu (Clarence Wilkerson) (12/27/90)

If the board has some DRAM, it's the ALR Z80 card. If no ram
of its own, it may be a clone of the Microsoft Z80 card. These
each require their own boot disks, but data disks are compatible
between the two systems. The ALR card supported some add-on cards
for extra memory , maybe even a version of CP/M Plus.