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fluxengine/doc/disk-tids990.md
2020-08-22 12:37:11 +02:00

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Disk: TI DS990 FD1000

The Texas Instruments DS990 was a multiuser modular computing system from 1998, based around the TMS-9900 processor (as used by the TI-99). It had an 8" floppy drive module, the FD1000, which was a 77-track, 288-byte sector FM/MFM system with 26 sectors per track. The encoding scheme was very similar to a simplified version of the IBM scheme, but of course not compatible. A double-sided disk would store a very satisfactory 1126kB of data; here's one at old-computers.com:

FluxEngine will read and write these (but only the DSDD MFM variant).

Reading discs

Just do:

fluxengine read tids990

You should end up with an tids990.img which is 1153152 bytes long.

Writing discs

Just do:

fluxengine write tids990 -i tids990.img

Useful references