Seven HP-71B Calculators and Four ThinkJet Printers

[Dave Frederickson]

(10-26-2024 07:17 AM)J-F Garnier Wrote:  From the Soft Forth manual (p.2.2)

... and from the 71B EPROM programmer manual, p. 12.

CAUTION: When in the 64K mode, always have a FORTH ROM inserted
into another HP-71 port. This prevents a bug in the HP-71 operating
system from configuring the 64K RAM block incorrectly. The
FORTH ROM must be inserted to FREEPORT the RAM correctly.

The bug was fixed with the 2CDCC firmware.