Hi All,   
      
     Got this from Amigacue.org when I got some of Asha's Sunday Chat sound files!   
      
      
      
   Amiga system routine   
      
    Amiga system test is a complicated set of routines which it must go   
   through before you can do any work on it. During the system test the Amiga   
   is attempting to let you know if the system is well. Here is a list of the   
   start-up activities:   
      
   1. Clear all chips of old data   
   2. Disable DMA and interrupts during the test.   
   3. Clear the screen.   
   4. Check the hardware ....checks to see if 68000 is functioning.   
   5. Change screen color.   
   6. Do a checksum test on all ROMS.   
   7. Change screen color.   
   8. Beginning of system startup.   
   9. Check RAM at $C0000,and move SYSBASE there   
   10. Test All CHIP RAM.   
   11. Change screen color.   
   12. Check that software is coming in ok.   
   13. Change screen color.   
   14. Setup CHIP RAM to receive data.   
   15. Link the libraries   
   16. Check for additional memory and link it   
   17. Turn the DMA and interrupts back on.   
   18. Start a default task.   
   19. Check for 68010,68020, and or 68881.   
   20. Check to see if thee is an exception ...processor error   
   21. If so do a system reset.    
       
    During this system test the Amiga is sending vital information to the   
   screen with colors. If the system checks out ok, you will see the following   
   sequence that you have seen so many times.   
      
   DARK GRAY:A  The initial hardware tested OK. the 68000 is running   
    and the registers are readable.   
       
   LIGHT GRAY: The software is coming in and seems OK.   
      
   WHITE: The initialization test have passed.   
       
       
     If something is wrong with your system, you may see the following:   
       
   RED: Error was found in ROMS.   
       
   GREEN: Error found in the CHIP RAM.   
       
   BLUE:  Error was found in the custom chips.   
      
   YELLOW: If 68000 found an error before the error trapping software (GURU)   
     was running.   
      
      
    The Keyboard has it's own processor, RAM and ROM. A selftest is performed   
   on power-up in the following sequence.   
       
   1. Performs checksum on ROM's   
   2. Checks 64 bytes of RAM.   
   3. The timer is tested.   
   4. Performs handshake with computer and gives results of selftest.   
   A    
    If the keyboard does not pass the test it will notify you that it is not   
   working properly. This information is indicated with the blinking of the   
   CAPS-LOCK light.   
       
   One Blink:  Keyboard ROM check failed.   
       
   Two Blinks: Keyboard RAM checked failed.   
       
   Three Blinks: Watch dog timer failed   
      
   Four Blinks: short between two row lines or special control keys.   
       
    If you are having problems with the Amiga, perhaps these codes will help   
   you and your repairman.   
      
    This article was first authored by Roy Frisque and published on the   
   newsletter Scanlines. Roy obtain his information from the Amiga Transactor,   
   which is a great resource for the Amiga.   
       
       
     AMIGA EXCHANGE   
     24 HRS, 3/12/24 BAUD   
     213-325-1796   
     SysOp: Robert Takahashi    
      
      
      
   IMHO, I think something is wrong with chip ram at step 14 or a component   
   prevents the reset in step 21.   
      
   Dennis   
      
      
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