4.2 DEV-Kit Schick

Das DEV-Kit von Bastian Schick

* How to modify you Jaguar *

Attention : This is on your own risk !
Don't blame me if anything goes wrong !
If you're not experienced in soldering, stop here !

You need :
- an EPROM type 27c010 or 27c1001 (this is 128K x 8)
- a 32pin socket
- a switch ( on-on )
- two 4k7 resistors (1/4W)

- some wire
- good nerves

1) Open your jaguar and remove the shield.

2) Cut /CE (pin 22) as close as possible to the pcb and bend it up.

3) Solder a resistore at this pin and at pin 32 (Vcc), this pulls /CE up.

4) Bend up the socket's pin 22

5) Solder the socket onto the original ROM

6) Solder the second resitore at pin 22 of the socket and at pin 32 of the ROM

7) Solder 3 wires to the switch, the main (which is switched) to the /CE on the pcb (don't make a short cut !) and the other two either to pin 22 of the ROM and the socket

8) Switch you Jaguar ON to test. In one postion nothing should happen, in the other, it should boot normaly.

9) If nothing happens, check all steps and check for short-cuts.(!nl)

10) Burn the image DEBJAG.IMG at the very beginning of the ROM. (Yes it's small !)

11) Insert your EPROM and switch your Jaggy on.

12) Everything is fine, if a message screen appears, with a 68k register-dump and a blue or red border.

13) Prepare the cable and enjoy hacking the Jaguar.

14) Again, don't blame me, if some errors occur !


42Bastian (elw5basc@gp.fht-esslingen.de)