Multi-Speeder for the Commodore 1541 floppy disk drive I and II (V1.7) demo.

My multi-speeder project for the Commodore 1541 floppy disk drive consists of an expansion board which is placed between the 6502 CPU. The board extends the working memory of the 1541 by 32 KB and provides 8x 64 KB banks for DOS operating systems on the 1541. The expansion board can be operated in the two versions 1541-I and 1541-II. I have also designed a version for the Oceanic OC-168 clone (on request). The original CBM-DOS 2.6, DolphinDos 2.0, SpeedDos 2.7 +, SpeedDos Expert, JiffyDOS and S-JiffyDOS, among others, can be operated switchably with the multi-speeder expansion board.
The addressing of the ROM and RAM areas varies, so the Multi-Speeder can be used for the different floppy speeders.