This project is an advanced development of the highly popular and fast DolphinDos 3 for the C128 and the 1571 floppy drive. It combines the best of the retro world with modern technology and was previously unavailable in this form. The switchless 8x Multi-Floppy-Speeder not only runs with DolphinDos 3 but also allows the operation of up to eight DOS kernels as well as C128 and C64 kernels, which can be conveniently activated via DOS commands. This means that, in addition to the original CBM-DOS and DolphinDos 3, JiffyDOS 128 can also be used, for example. Additionally, a TrackCache version of JiffyDOS is available, which significantly speeds up JiffyDOS. This ensures maximum compatibility.

Version 3.x now features 512 KB of RAM, compared to version 2.x, which had only 32 KB of RAM. In combination with the Peripheral Interface Adapter (PIA, type 6821 or 6521), it enables ultra-fast parallel data transfer as well as control of the 64 x 8 KB RAM banks (512 KB).

With the enhanced DolphinDos 25, the floppy drive can independently read an entire disk into the expanded 512 KB memory in two RAM pages via DOS commands and then write it back to a newly formatted disk. This process is particularly fast since no data transfer to the computer is required.

All components of the Multi-Speeder for the C128DCR are installed internally. The internal kernel switcher synchronously switches the appropriate C128/C64 kernel, while the internal parallel port adapter board ensures parallel data transfer. The User port remains unused externally.

The switchless 8x Multi-Floppy-Speeder with 512 KB RAM expansion for the Commodore C128DCR is one of the most versatile accelerators for the internal 1571 floppy drive of the C128DCR.

Additionally, the switchless 8x Multi-Floppy-Speeder is fully RAMBoard-compatible, allowing the use of appropriate nibble copy programs that support RAMBoard.

I have also developed this Multi-Speeder for external 1571, 1541, and 1541-II floppy drives with various matching PCBs. These can be operated in combination with each other.

This board also includes the parallel port adapter PCB and the C128/C64 kernel switcher PCB, which I also offer here on PCBWay as a shared project. These are not included in this shared project.

Projectpage on Github:

https://github.com/FraEgg/commodore-c128dcr-1571-switchless-floppydrive-8x-multi-floppy-speeder

Addon Shared Project (Kernal-Switscher Adapter):

https://www.pcbway.com/project/shareproject/C128_C64_U32_Kernal_Switcher_Adapter_for_Switchless_8x_Multi_Floppy_Speeder_with_f113e895.html

Addon Shared Project (Parallel Port Adapter):

https://www.pcbway.com/project/shareproject/Parallelport_Adapter_U4_for_Switchless_8x_Multi_Floppy_Speeder_with_32_KB_RAM_Ex_558623e7.html