/pub/cbm/firmware/drives/old/8050/

These files were uploaded by William M. Levak <wlevak@sdf.org>.

Subdirectories

d/
Some documentation about the 8250, produced by Olaf Seibert.

Files

251167-01.bin 2017-05-23 2048
8250LP GCR ROM (same as 901467)
251474-01b.bin 2009-08-18 1024
The floppy drive controller (FDC) firmware for 8250LP and 8296D drives. This is very similar to 901869-01. Ville Muikkula reports that his 8250LP has a little circuit board inserted in the place of the 6530 RIOT chip. Located on this circuit board are the original 901869-01 and a 2732 EPROM chip. The first 3 kilobytes of the 2732 are filled with $aa. In Marko Mäkelä's 8296D, the daughter board contains a 901885-04 RIOT and a 74LS04 in addition to the EPROM.
8250lp.txt 2016-06-07 960
Parts list for 8250LP. Compiled by William Levak
901467-01.bin 2009-08-18 2048
6316-017 ROM GCR (the same as 901467 without the revision marking)
901482-03.bin 2009-08-18 8192
2364 ROM DOS 2.5 C000-DFFF
901482-04.bin 2009-08-18 8192
2364 ROM DOS 2.5 E000-FFFF
901482-06.bin 2009-08-18 8192
2364-091 ROM DOS 2.5 rev. C000-DFFF
901482-07.bin 2009-08-18 8192
2364-092 ROM DOS 2.5 rev. E000-FFFF
901483-02.bin 2017-05-24 1024
6530-036 RIOT DOS 2.5
901483-03.bin 2009-08-18 1024
6530-038 RIOT DOS 2.5 Micropolis
901483-04.bin 2017-05-24 1024
6530-039 RIOT DOS 2.5 (Tandon)
901869-01.bin 2009-08-18 1024
6530-48 RIOT DOS 2.7 MPI
901885-04.bin 2009-08-18 1024
6530-47 RIOT DOS 2.7 Micropolis
901887-01.bin 2009-08-18 8192
2364 ROM DOS 2.7 C000-DFFF
901888-01.bin 2009-08-18 8192
2364 ROM DOS 2.7 E000-FFFF
dos-2.7b.bin 2009-08-18 16384
CBM DOS 2.7B from the 8250LP inside Wolfgang Günther's 8296D. The EPROM where the code was stored carried no Commodore part number.
fdc-2.7b.bin 2009-08-18 2048
CBM DOS 2.7B FDC ROM from the 8250LP inside Wolfgang Günther's 8296D. The EPROM where the code was stored carried no Commodore part number.
speeddos-c000.bin 2009-08-18 8192
SpeedDOS firmware from a 8250LP, C000-DFFF
speeddos-e000.bin 2009-08-18 8192
SpeedDOS firmware from a 8250LP, E000-FFFF
speeddos-fdc-f800.bin 2009-08-18 2048
SpeedDOS disk controller firmware from a 8250LP. Note that this is 2 kilobytes instead of the usual 1 kilobyte.

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