Other assembler differences

Element DOS/VSE Assembler Assembler H Version 2 High Level Assembler
Object module
DXD, CXD and Q-type constants produced No Yes Yes
Named COMMON No Yes Yes
Unnamed CSECTS (private code) No Yes Yes
SYM records produced No Yes Yes
Generalized object format module generation (z/OS and CMS) Not applicable No Yes. Refer to GOFF/XOBJECT assembler option.
Support for relative-immediate external references No No Yes
Diagnostics
Diagnostic messages issued At end of assembly At line where error occurred if possible. At line where error occurred if possible.
Diagnostic dump No Produced at time of failure Produced at time of failure
Error diagnostics messages in mixed case No No Yes
Resources
Work file 3 Work Files 1 Work File No. Tolerated if allocated, but not used.
Associated data file No No Yes
QSAM Input/output (z/OS and CMS) Not applicable No Yes
External functions No No Yes
Input/Output user exits No No Yes
System-Determined Blocksize (z/OS) Not applicable No Yes; supported in z/OS only.
31-bit-addressable storage exploited during assembly No No Yes; does not include I/O buffers.
Minimum virtual storage requirements 200K 200K 610K
Printer control characters (z/OS and CMS) American National Standard Machine American National Standard or machine depending on ASA option
Alternative assembler option sourcefile No No Yes

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