User guide

1541 Ultimate User Manual

http://www.1541ultimate.net/

Other questions and answers

Can i use a third party drive kernel that is larger then 16 KB?

No you can’t. At present (firmware 1.5) only 16KB roms are supported.

Can i use a filecopy tool to copy PRG files to the IEC 2 SD drive?

No, you can’t. The IEC 2 SD drive only support the Commodore LOAD

and SAVE functions, and doesn’t allow block access, which these kind of

copiers almost always use.

Can I use my own sound?

The 1541 Ultimate has a file called sounds.bin which is located in the

update1 directory of the firmware package. This file is a RAW sound file

in 22050 Hz. Each sample is of a predefined length, and located at a

specific offset. The exact details are unknown at present.

Can I use JiffyDOS kernel for the 1541 Ultimate’ emulated drive?

Yes you can. Put the 16KB JiffyDOS kernel in the root of your SD Card,

and name it 1541.rom. Then change the option ‘1541 ROM Select’ to

‘Load from SD’.

How do I add a power supply?

The 1541U has a Mini-USB port. You can use that port to supply power to

the board, but only when it is not inserted into a cartridge slot, simply

because the Mini-USB port itself is physically not accessible when the

1541U is inserted into the cartridge slot. I have no idea what would

happen if you connect a PSU for power by soldering 2 wires to the USB

port of the board while it is plugged in into the cartridge slot!

Based on that adding a PSU is only possible when using the board in

Standalone mode. Pin 1 (most left pin looking from the insertion side) of

the USB socket is the 5V line, and pin 5 of the USB socket is the ground!

If you don’t understand, or just are unsure, check

http://www.accesscomms.com.au/reference/usb.htm for more info. At

least don’t get it wrong, else you probably will blow up your 1541U, and I

can’t be held responsible in any way!

What’s the easiest way to backup my real diskettes onto the SDCard?

Create an empty D64 image from the 1541U menu, mount it in the

Emulated drive, and use the Action Replay or Retro Replay built in disk

copier. Turn off BAM Copy option!

Please remember to use different drive letters for your real 1541 drive,

your 1541U emulated drive, and your 1541U IEC2SD drive. Since most

real drives without any modification are running on id 8, it easiest to set

the 1541U Emulated drive to 9, and the IEC2SD to a higher number.