home *** CD-ROM | disk | FTP | other *** search
-
- 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: 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.
-
- 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.
-
- 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
-
-
-
-
-