Amiga 500 : codes d'erreur au démarrage (non traduit)

[Dr Vintage]

During boot-up, the Amiga is going through a series of system checks and routines.

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, 68881 or other processor upgrades.
    
20. Check to see if there is an exception or 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:  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.

The failure mode screen colors:

• Turquoise (0x0CC) (A1000 only): RAM failure in the Kickstart WCS
  
• Green (0x0F0) error in the lowest 256 bytes of Chip RAM. Possible causes, defective CIA-A IC or defective Agnus IC.
  
• Yellow (0xFE5) an unexpected processor exception before the appropriate system failure message was prepared. This could mean defective hardware or an attempt to access a RAM address where no RAM exists.
  
• Red (0xF00) invalid KickStart ROM checksum.
  
• Magenta (0xF0F) single-task or cold-start initialization failed.
  

Another listing of screen color interpretations:


If the Amiga caps lock key LED blinks repeatedly at boot up, another series of error messages must be consulted:

• One blink: keyboard ROM checksum error
  
• Two blinks: RAM failure
  
• Three blinks: watchdog timer failure
  

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 self-test.
   

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:  A short between two row lines or special control keys.