DRL - the TSS system call.

Description:

The DRL (pronounced "derail") instruction is used by programs in TSS to request services from the TSS executive, in somewhat the same manner as batch programs use the MME instruction to obtain batch system services.

The calling sequences for the various derails are described in the TSS System Programmer's Reference Manual. Explanations for many derails are available on-line, by typing

expl drl <drl-name>
where "<drl-name>" is one of those mentioned in "expl drl index" (e.g. "expl drl abort").

Index to DRLS

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