Description: Apple IIGS: System Diagnostic Errors
Header: Apple IIGS: System Diagnostic Errors


 This article last reviewed: 10 November 1988

 Here's the currently available, though incomplete, list, with explanations,
 of error codes generated by the Apple IIGS when running system diagnostics
 for the Apple II Family (V1.0B1).

 Apple IIGS error codes have the form AABBCCDD.

 Test numbers AA

 Error Code (AA)        Test
 ---------------      ----------------------------
 "RM"/01                Checksum
 02                     RAM Moving Inversions
 03                     Softswitch
 04                     RAM Address
 05                     FPI Speed
 06                     Serial I/O
 07                     Real Time Clock
 08                     Battery RAM
 09                     Front Desk Bus
 0A                     Shadowing
 0B                     Interrupts

 AA=06  serial test
 BB          Meaning
 --         -----------
 01          Register R/W
 04          Tx Buffer empty status
 05          Tx Buffer empty failure
 06          All sent status fail
 07          Rx char available
 08          Bad data

 AA=03  RAM test
 BBCC=  Address

 AA=01  ROM Checksum
 BB=    Failed checksum
 DD=1   Bad RAM

 AA=05  Speed
 BB=1   speed stuck slow
 BB=2   speed stuck fast

 AA=08  Battery RAM
 BB=01  address test failure and CC= bad address
 BB=02  memory failure and CC = pattern, DD = Address

 AA=02  Softswitches
 Bb=    Statereg bit
 CC=    Read softswitch address

 AA=04  Front Desk Bus
 BBCC=  Bad checksum found
 DD=01  FDB toolcode encountered a fatal error and no checksum computed

 AA=04  Ram Adddress
 BB=    failed bank No
 CC=    failed bit

 AA=06  Clock Test
 BBCCDD=not used
 DD=01  a fatal error occcurred after the test to within a second

 AA=0A  shadow register functionality

 AA=0B Mega II and VGC capability of generating interrupts.
 BB=01 VBL interrupt timeout
 BB=02 VBL IRQ status fail
 BB=03 1/4 SEC interrupt
 BB=04 1/4 SEC interrupt
 BB=05 ---
 BB=06 VGC IRQ
 BB=07 SCAN Line
 Copyright 1988 Apple Computer, Inc.
 Keywords: