Zimmers.NET Files (formerly ftp.funet.fi)


These are the programs and instructions on how to read and write MS-DOS disks with a modified 1541. A 1541-II cannot unfortunately be modified for the program.


1541-dos.readme 2009-08-18 2283
Overview and CRC32's for the files
1541-dos.sfx 2009-08-18 27812
C64 programs in a self-extracting archive:
1541-reads-dos, 1541-writes-90k

1541-dos.txt 2009-08-18 43512
Instructions for programs & the hardware modification
1541-dos.zip 2023-09-05 20414
MS-DOS files in a self-extracting archive (and zipped):
read90k.com, 1541bloc.gif, 1541-clk.gif. For those who have no
access to LHA or MS-DOS, the same files (pictures converted to a
more modern format) are available individually from this directory.
1541-rdp.prg 2009-08-18 30278
1541-rdp.readme 2009-08-18 2416
An improved, faster version of 1541-reads-dos.

1541bloc.png 2009-08-18 3376
Block diagram of the 1541 data flow when reading from the disk.
1541clk.png 2009-08-18 6398
An excerpt from the 1541 schematic diagram featuring the bit clock circuitry.
Includes the modification instructions.
read90k.com 2009-08-18 1467
MS-DOS utility for reading the special 90-kilobyte format.

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