Added basic tests for stack and arithmetic IMPs.

[vvhitespace] / tests / 1002_stack_dup.pvvs

# This test verifies stack IMP duplicate.

SSSTSSSSSTN     | ST: Push +65 (ASCII A)
SNS             | ST: Duplicate TOS
TNSS            | IO: Output character
TNSS            | IO: Output character
NNN             | FC: Terminate program