User guide

1541 Ultimate User Manual

http://www.1541ultimate.net/

Regardless of the operating mode, pressing all three buttons at the same time will cause

the 1541U to perform a hard-reset. This is easiest done by pressing left (pointing-finger)

and right button (ring-finger), and then the middle button (middle finger), and then

immediately releasing the three buttons, with whatever hand is nearest to the buttons.

After resetting, remember to watch the led lights mentioned above.

Casing

The 1541 Ultimate has no default casing. You have to be very careful in using the

hardware. Avoid static electricity altogether. Off course you should NEVER fiddle with

the hardware when it or any other hardware connected to it, is powered-up.

Since components are so closely located to the edge of the board, designing a case isn’t

easy. Also, the width of the board might create some problems on different types of

Commodore computers for any casing. Be warned, if you insert the board into the

Commodore cartridge slot, don’t be distracted and pay attention. A slip of the board

while inserting it into the cartridge port might damage the delicate components if done

wrong!

There are several 1541 Ultimate boards. The original design came in two flavors: 1541U

and 1541U Plus, with an equal length of 96 mm, and width. The only difference was the

RAM size. From batch 2 and up the 1541U has an increased length to 100 mm, equal ram

size, and the width remains the same.

So, the 1541 Ultimate boards batch 1 are 96 mm in length, and batch 2 and later are

100 mm long. Batch 1 boards further compared to the latter boards:

 i have noticed that the most connector have shifted a bit, see photographs

 a different SD CARD socket is used

 the width of both boards is the same

OK, don’t sweat when you are working with hardware. A drop of sweat on any hardware

(component) probably will lead to a short-circuit, permanently damaging the hardware

and rendering it useless, not to mention the risk of personal injury.