HP-41 instruction print bug found

[mfleming]

(11-05-2019 01:56 AM)hth Wrote:  

(11-05-2019 01:00 AM)Ken S Wrote:  Couldn't you use the switch on the IL module to disable the printer and then load the patched rom? The reason for the switch was so you could plug in another printer while the module was in place without conflict. I thought the switch just disabled the power to the internal IL print Rom. Not sure if this would work but worth a shot.

That is a good idea in theory, but I do not think it will work. The problem I think is that the disable switch actually relocates the printer ROM from page 6 to page 4. Since there are page 4 modules, it will probably create page 4 conflicts.

Tested, and works. The Mass Storage ROM shows up in 7, LIB#4 remains in 4, and the ROM plugged into page 6 (HEPAX) shows up in a CAT 1G and works fine. You'll have to test relocating a modified copy of the printer rom in RAM to page 6