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HP-41 page 7 safety
09-16-2016, 04:18 AM
Post: #3
RE: HP-41 page 7 safety
(09-15-2016 07:11 AM)Ángel Martin Wrote:  The HEPAX would allocate itself to page-7 if available during its initialization, check its CALC_ON polling point code for details. It even goes to page-6 using the same routine. Obviously they must leave blank the hot areas, like the printer extended polling points. They also blanked the entry points to [IUNA] and [IUNALL]. I've done the same for the OS/X and PowerCL modules, which are meant to be both page-6 and page-7 safe...

The HP-IL existence routine I added to the Library#4 checks for the word value at 7000, I thought this was better than the drive check HP used, and it's also compatible with other modules located there - like the HEPAX, the OS/X and the PowerCL.

Where is the IUNA and IUNALL routines? I looked into the VASM listings for the HP-IL modules, but I could not find them.
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Messages In This Thread
HP-41 page 7 safety - hth - 09-14-2016, 05:21 AM
RE: HP-41 page 7 safety - Ángel Martin - 09-15-2016, 07:11 AM
RE: HP-41 page 7 safety - hth - 09-16-2016 04:18 AM
RE: HP-41 page 7 safety - Ángel Martin - 09-16-2016, 05:50 AM

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