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Sounds like we should change the "and cx" mask to 5 so that if either EHDD support or LBA is announced by the bios, the correct EHDD path will be taken. Phil P. -- Philip Pokorny, RHCE Chief Technology Officer PENGUIN COMPUTING, Inc www.penguincomputing.com Changing the world through technical innovation

...> > > * I die now. i wrote: > > I place my bet on CX value 4. :)) David Christensen wrote: > No carry. > 3000 > AA55 > 0004 > 0080 > I die now Hah ! CX announces no LBA addressing but Enhanced Disk Drive Support. https://en.wikipedia.org/wiki/INT_13H#INT_13h_AH.3D41h:_Check_Extensions_Present So isohdpfc pushed CX = 4 onto the stack, because it skipped andw 1,%xc So isolinux.bin read in "EHDD" mode by LBA and succeeded although it did not announce this capability. isohdpfd reached the "andw" instruction. So CX was set to (1 & 4) =...

Hi, Geert Stappers wrote: > Contact David off-list, he did unsubscribe. Can you tell when he unsubscribed (i.e. which of the messages he got as last one) ? > Martin posted elsewhere in this thread "Thomas, you found the bug" > and provided a patch. Open question is whether the fix helps with David's BIOS. The newest answer from Martin indicates that a failure to read