ISIS-II floppy disks

While checking various 8 inch floppy disks we found these two disks that contain ISIS-II related files. The original disks are 77 tracks, 26 sector 128 bytes/sector, Single Density disks. 

Since the ISIS-II format has been revered engineered by Perry C. Hutchison in 1977,  we followed the guide and managed to extract the files from the disks. 

Further study of the contents reveal that the second disk contain files that mention TANDBERG TDV2100 ASSEMBLER, TDV 2100 LINKER V.1.2, TANDBERG LINE EDITOR VER. 1.1 and TOS21 VER. 1.81. This probably means that this disk has been used for a TDV21xx system (TDV 2114 perhaps). But then there has to be some basic similarities between ISIS-II and TOS since the disk format structure is identical. 

The first disk has a Copyright notice (C) 1975,1976 INTEL CORP so it is a probably a original ISIS disk. 

This is the contents:

Disk 1

ISIS-II DISK 1

ATTRIB DSPERR ICE80.OV1 ISIS.LAB PLM80.OV0 PLMCOD.CSD
COPY EDIT ICE80.OV2 ISIS.MAP PLM80.OV1 PLMNOC.CSD
DELETE FORMAT ISIS.BIN ISIS.T0 PLM80.OV2 RENAME
DIR ICE80 ISIS.CLI PLM80 PLM80.OV3 SUBMIT
DSP ICE80.OV0 ISIS.DIR PLM80.LIB PLM80.OV4 SYSTEM.LIB

The disk in IMD-format and in RAW-format. The extracted files as a tgz.

Disk2

ISIS-II DISK 2

ALIAS DEBUG EXEC LINK RELEAS TTY
ALLOC DELETE FORMAT MDUP REMAP TXT
ANALYZ DGEN FRAPP MEMDMP RENAME TXW
ASM DIR HEXBIN MOVE RESCUE XREF
ASSIGN DIRPAC INIT MYLOAD SEDIT
ATTRIB DROP ISIS.DIR O SYS
DCONVA DRSTC ISIS.ERR PAGE SYSTEM
DCOPY EDIT ISIS.LAB PROM T2
DDUMC ETX ISIS.MAP RASM TPGEN

The disk in IMD-format and in RAW-format. The extracted files as a tgz.


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