The board expands the Commodore 1541 disk drive with 32 KB SRAM (RAMBoard compatible) and integrates 8x 64KB ROM banks for various DOS systems (Speeders) in a single 512KB ROM. In this version 2.2c, the DOS Kernals can be switched "switchless", i.e., without a physical switch, via DOS commands from the computer. No holes or switches are needed on the casing to switch between DOS/Speeders.

This variant, except for the 32 KB SRAM, is designed in THT construction and is easier to assemble yourself. It is ideal for development and use in older 1541-I disk drive models. All ICs can be socketed.

Key Features:

• 8x 64KB ROM Banks: For various DOS systems and Speeders (e.g., DolphinDos, SpeedDos, JiffyDOS, ...)
• Switchless Switching: DOS Kernals can be switched directly via DOS commands on the computer.
• Compatibility: Supports DolphinDos 2, SpeedDos Expert, SpeedDos+, JiffyDOS, S-Jiffy, and the original CBMDOS 2.6.
• RAM Expansion: The additional 32 KB SRAM allows the board to also function as a RAMBoard for specialized nibble copy programs.

Accessories:

• Parallel Cable Sets for the Commodore 1541 Disk Drive (SpeedDOS, DolphinDOS) with the C64/C128