tirsdag den 17. marts 2009

Piccolo and Piccoline disks

A very long time ago I spent a lot of time with the Piccolo (RC702 and the trusty RC701B) and Piccoline systems from the Danish computer producer Regnecentralen which ran CP/M-80 and CCP/M-86 respectively.

Not SO many years ago I played with reading the old Piccolo and Piccoline 5.25" diskettes from MS-DOS using the 22DISK program from SYDEX ()

Yesteday I found the old files and decided to share my results from back then (but unverified as I do not have a 5.25" drive hooked up).
The following definitions worked with version 1.40 of SYDEX:


BEGIN R702 Rc702 Piccolo - SSDD 48 tpi 5.25"
DENSITY MFM ,LOW
CYLINDERS 36
SIDES 2
SECTORS 9,512
SIDE1 0 1,3,5,7,9,2,4,6,8
SIDE2 1 1,3,5,7,9,2,4,6,8
BSH 4 BLM 15 EXM 1 DSM 135 DRM 127 AL0 0C0H AL1 0 SOFS 36
END

BEGIN LINE RC Piccoline - 5.25" DSHD
DENSITY MFM ,HIGH
CYLINDERS 77
SIDES 2
SECTORS 8,1024
SIDE1 0 1,2,3,4,5,6,7,8
SIDE2 1 1,2,3,4,5,6,7,8
ORDER SIDES
BSH 4 BLM 15 EXM 0 DSM 616 DRM 511 AL0 011111111b AL1 0 SOFS 32
END

Hopefully this may help some computer archeologist some day :)