Commodore 128D - Page 209

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What to Buy
Because CP/M has been implemented on almost every computer
ever designed that used the Intel 8080 orthe Zilog Z80 CPU, there is
a very large amount of software available for running on CP/M sys
tems. For more information on CP/M Software available for the C128
send a stamped, self-addressed envelope to:
FOG, the International Non-Prof it Computer User's Group
P.O. Box 3474
Daly City, CA 94015-0474
'-* >
CP/M normally uses Modified Frequency Modulation (MFM) to
record on disks. Commodore DOS normally uses Group Code „
Recording (GCR). The 128D internal disk drive can read both, but the
older 1541 can only read GCR. Off-the-shelf CP/M software packages
only come as MFM disks. Even within MFM there are many different
formats: the 1571 can read disks formatted for:
Epson QX10
IBM-8SS (CP/M-86)
IBM-8 DS (CP/M-86)
IBM-9SS (CP/M-86)
IBM-9 DS (CP/M-86)
Kaypro II
Kaypro IV
Osborne DD SS
OsborneDDDS
(512 byte sectors, double sided, 10 sec
tors per track)
(512 byte sectors, single sided, 8 sectors
per track)
(512 byte sectors, double sided, 8 sectors
per track)
(512 byte sectors, single sided, 9 sectors
per track)
(512 byte sectors, double sided, 9 sectors
per track)
(512 byte sectors, single sided, 10 sectors
per track)
(512 byte sectors, double sided, 10 sec
tors per track)
(1024 byte sectors, single sided, 5 sectors
per track)
(1024 byte sectors, double sided, 5 sec
tors per track)
Therefore when buying CP/M software you must buy it on a disk in
one of the above formats. Also, be aware that your C128 will run soft
ware written to run under either CP/M 2.2 or CP/M Plus (which is the
newer name for what was originally known as version 3). However,
CP/M-86 is the version of CP/M designed for use on 16-bit proces
sors: CP/M-86 software will not run on your C128's 8-bit Z80 proces
sor, although the 1571 drive will let you read CP/M-86 data files.
201
USING CP/M MODE-Files, Disks and Disk Drives in CP/M 3.0