TOS Errors and Bombs

@atari

Published in 

atari

 · 25 May 2022

The enclosed is a list of the most commonly encountered TOS errors/bombs.

ERRORS

• -1 : General Error
• -2 : Drive not ready - time exceeded
• -3 : Unknown command
• -4 : CRC error - disk checks wrong
• -5 : Bad request
• -6 : Seek error - track not found
• -7 : Unknown media - boot sector wrong
• -8 : Sector not found
• -9 : Out of paper
• -10 : Write fault
• -11 : Read fault
• -12 : General error 12
• -13 : Write protected
• -14 : Media change detected
• -15 : Unknown device
• -16 : Bad sector (verify)
• -17 : Insert other disk (request)
• -32 : Invalid function number
• -33 : File not found
• -34 : Path not found
• -35 : Too many open files
• -36 : Access denied
• -37 : Invalid handle
• -39 : Out of memory
• -40 : Invalid memory block address
• -46 : Invalid drive specification
• -49 : No more files
• -64 : GEMDOS range error - seek wrong ?
• -65 : GEMDOS internal error
• -66 : Invalid executable file format
• -67 : Memory block growth failure

BOMBS

• 2 : BUS ERROR - This occurs when a program tries to access a non-existent location in memory.
• 3 : ADDRESS ERROR - This occurs when trying to access a word, long-word or 68000 instruction from an odd-numbered memory location.
  
• 4 : ILLEGAL INSTRUCTION - This occurs when the CPU tries to execute from a memory location that does NOT contain a valid 68000 instruction.
  
• 5 : ZERO DIVIDE - A number was divided by zero.
  
• 6 : CHK INSTRUCTION - 6 bombs is one possible result of a 68000 "chk" instruction; the other is the continuation of any executing program. It is up to a program to replace this vector with some other number.
  
• 7 : TRAPV INSTRUCTION - 7 bombs will occur if a 68000 "trapv" instruction is executed and an overflow in an arithmetic operation occurs. This vector can also be changed by a program to warn users that an overflow has occurred.
  
• 8 : PRIVILEGE VIOLATION - Occurs when "supervisory" instructions are attempted in "user" mode.
  
• 9 : TRACE - The 68000 can be configured to go to a specific address after every machine instruction is executed. If this address does NOT exist you will get 9 bombs.
  
• 24 : SPURIOUS INTERRUPT - This is when a bus error occurs during a system interrupt.