Date   : Wed, 15 Jul 1987 11:18:15 MDT
From   : Raymond Carter STEWS-NR-AS 678-1376 <rcarter@wsmr02.ARPA>
Subject: C128 + 1581

I recently patched the 6DEC85 CP/M+ operating system to support 800K on the
new 1581 disk drive (incidently, they are now available and selling for
about $210 - less than a 1571).
This was necessary, since they are shipped without a new version of CP/M.
There is a card to order it from Commodore for $20, but it ain't ready
yet.

In case your're interested, I basically patched the portion of CXDISK.ASM
which sets up TYPE2 disks.  Change the 40 to 80 and 79 to 159.  Then fill
in an appropriate empty slot in the drive definition tables.  I used 
4K allocation blocks, and 1K physical blocks (it's necessary to format
the disks in Commodore BASIC before booting CP/M).

If you need further help, send mail, but I'll be unavailable for about
three weeks.

Ray Carter