Skip to content

Archive

Category: Drives
    A friend of mine, Hedning/Genesis Project, sent me pictures of a 1541-clone that neither of us recognized and we asked around if anyone knew the name of the drive. Moloch contacted us with pictures and said it known in the US by the name “Commander II”. It might been stripped of the labels when imported to Euro-Land and sold as a different product. The Commander II was reviewed in Ahoy issue 16, 1985 (pages. 28-38).

     

    Update 2016-07-24: Hedning was generous and gave me one of his drives, thanks a lot! I added a few more pictures of the drive.

     
    Update: Thanks to Moloch we now have a name for this previously unknown clone. It was sold in the US by the name “Commander II”.

     


     

    The LEDs might been replaced with green/red since some traces were broken. I also removed a home-made deviceswitch due to its bad construction.

     

    The +5V is connected to the large area on this side of the PCB.

     

    The mech is a Chinon F-051.

     

     

    +5V/+12V PSU.

     


     

    Pictures by Hedning

     

     

     


    Serialports are located on the side of the drive.

     


    “Diskett” was a local Commodore computer shop/service center located in Malmö, southern sweden.
    The second drive, with serial 841633, does not have this sticker.

     

     

     

    1541clone_hp64_7

     


     

    Pictures by Moloch

     

     

     

     

FD-148 is a third party floppydrive for the Commodore 64.

 

 


 

 


Remove the screws marked with red and lift the cover.
 


You need to loosen 4 screws to remove the shielding and additional 3 screws to release the PCB.
 


Detach the white connectors and lift the main PCB. There is a ribbon cable beneath the PCB which also needs to be detached. The back plate can now be removed.
 


Remove the 3 screws marked in the picture. There are spacers below that PCB which you need to take care of.
 


Spacers marked with red.
Two voltage regulators(7805/7812) are fastened to the black heatsink to the right.

 


Flip the drive around and remove the 4 screws.
The drive mech is now loose, lift the plastic casing.
 


 


 


 


 

I had a broken 1571 on which I located the problem to the powersupply.

The PSU is relatively easy to refurbish with new caps and so forth, but I wanted to try out a switching powersupply i had.

The new powersupply is a MeanWell PT-65A and is rated 5VDC/7A and 12VDC/3,2A. It also has a -5VDC/0.7A output which was not used. This specific model was on a €4 sale at a electronics distributor and the current ratings were good, hence the selection.

 

WARNING! LETHAL VOLTAGES ARE PRESENT ON THE POWERSUPPLY.

 

 


1571 with original powersupply.

 

 


Mounting plate.

 


Testmount.

 


A very tight fit, I had to make a cut on the left side.
The PCB is mounted on spacers and the cables were crimped.

 

Finished assembly.

 

 

 

 

 

 

RapiDOS professional is a floppy speeder based on the Professional DOS by Klaus Roreger. More information on Professional DOS can be found at : http://www.d81.de/ProfessionalDOS/ and http://ar.c64.org/wiki/Category:Professional_DOS

RapiDOS was sold in the US by Chip Level Designs with kernel code written by Lawrence Hiller (aka Mr.Nike). Mitch/ESI gave ideas and feedback to the code resulting in RapiDOS having lots of “hacker enhancements” over Professional DOS, for example the built in monitor. It also functions on PAL (50Hz) Machines.

On this page you will find pictures of the RapiDOS hardware. The ROMs are also available for download.

Thanks to Mitch / ESI for information and for the hardware/ROMs !

 
Update: Added a .pdf with all reviews and advertisements regarding RapiDOS from Ahoy/Info/Gazette Magazines. Thanks to Stone Oakvalley for the information 🙂

Interesting to note is that Compute Gazette Issue 51 (1987-09) has an advertisement saying RapiDOS is “soon coming” and in Issue 54(1987-12) it is available. Later on C128 and CP/M is mentioned to be supported.

 


 

1541 with RapiDOS professional
Drive controller board and the CIA board installed. The wire lead is used for switching the RapiDOS on and off through the User-port board.

 


RapiDOS Professional User-port Board.
Switch to the left turns on/off the RapiDOS in both the C64 and the 1541.


C64 ROM Adaptor board

[No picture available]
The C64 ROM Adaptor board has a wire lead connected to the User-port board.

 


More pictures of RapiDOS Professional.

 

 

 

Parallell cable for Oceanic (OC-118) / Excelerator Plus drive.

You need to connect the following pins (identical to 1541). This drive works with Zoomfloppy.

 

There are four screws that hold the bottom plate, turn the drive upside down and remove the screws. Now you have access to the PCB.

 

Locate the correct chip by the pictures below (i soldered the wires directly to the legs).

Parallell cable for Oceanic (OC-118) / Excelerator Plus

 

Parallell cable for Oceanic (OC-118) / Excelerator Plus closeup