QDOS Errors

These are the errors codes that QDOS can return from a vectored utility, a Trap or from SuperBasic extensions.

When writing assembler routines, it is always advised to explicitly check the value in D0.L for an error code. This is done quickest using tst.l d0 and then checking the Z flag. Some traps and vectored utilities do not set the Z flag before returning which is why you have to do it.

Value QDOS MnemonicSMS MnemonicDescription
-1 ERR_NC ERR_NC Operation not complete
-2 ERR_NJ ERR_IJOB Not a (valid) job
-3 ERR_OM ERR_IMEM Out of memory
-4 ERR_OR ERR_ORNG Out of range
-5 ERR_BO ERR_BFFL Buffer overflow
-6 ERR_NO ERR_ICHN Channel not open
-7 ERR_NF ERR_FDNF File or device not found
-8 ERR_EX ERR_FEX File already exists
-9 ERR_IU ERR_FDIU File or device already in use
-10 ERR_EF ERR_EOF End of file
-11 ERR_DF ERR_DRFL Drive full
-12 ERR_BN ERR_INAM Bad device
-13 ERR_TE ERR_TRNS
ERR_PRTY
Transmission error
Parity error (SMS only)
-14 ERR_FF ERR_FMTF Format failed
-15 ERR_BP ERR_IPAR Bad parameter
-16 ERR_FE ERR_MCHK File error
-17 ERR_EX ERR_IEXP Expression error
-18 ERR_OV ERR_OVFL Arithmetic overflow
-19 ERR_NI ERR_NIMP Not implemented
-20 ERR_RO ERR_RDO Read only
-21 ERR_BL ERR_ISYN Bad line of Basic
-22 Not a QDOS error code ERR_RWF Read/write failed (SMS only)

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