My version of the manual (blue ring-bound manual, came with Blitz 2.1 floppy edition) has that exact code extract (page 63), but also has a section earlier on (page 34) saying that A4-A6 must be preserved, and restored before returning from the procedure if they were modified. This doesn't mention the UNLK line, and the code segment mentioned is missing. The addendum points to the code on page 63 for omission.
Last edited by Daedalus; 09 June 2018 at 12:43.
Reason: Ring-bound manual, not spiral-bound.
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