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Author Topic: Strange A1200 floppy disc problem  (Read 3423 times)

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Offline rkauer

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Re: Strange A1200 floppy disc problem
« on: September 03, 2007, 10:59:23 AM »
 Looks like one CIA chip is broke. Hard to repair.

 Buy a spare motherboard from ebay, vesalia, sothut or amigakit...
--------------------

 Hummmmmmm.......
 Second tought.

 Try this first (before you throw the towel): in  a cli, type "diskchange df0:". Try to read again the floppy. No good? Ok, it's time to throw the towell. :-(
Goodbye people.

I\'ll pop on from time to time, RL is acting up.
 

Offline rkauer

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Re: Strange A1200 floppy disc problem
« Reply #1 on: September 04, 2007, 06:50:37 PM »
 Then I do you a quick (and superficial) lesson:

 - Alice controls memory (and a small part of video generation), like its predecessor, Agnus;

 - Lisa does all the hard video job, (before was Denise ECS and OCS);

 - Paula does the audio and a little part of timing control for the floppy ports (in all Miggys);

 - CIAs (even and odd) controls directly the ports (floppy, ext floppy, serial, parallel, joy & mouse);

 - ROM keeps the basic routines in order to the Amiga boot.

 - CPU runs the programs (d'oh!) and controls the FastRAM (only acessed by itself), in the case of accelerators.

 More details to come... Someday:roll:
Goodbye people.

I\'ll pop on from time to time, RL is acting up.