Re: HP-IL 9114 Disk drive - accessing > 128K w/HP-41? Message #2 Posted by Vieira, Luiz C. (Brazil) on 16 Mar 2003, 8:43 a.m., in response to message #1 by Gene
Hi, Gene.
The HPIL standard NEWM for the 9114B media allows creation and access of about 128KBytes. Anyway, double-sided, single-density disks allow 630KBytes (extra 80KBytes used as spare space) when used with HP71B or HP75.
There is a program listed in the 9114B (pages 12-19, 370 steps; big guy, more than 120 registers) that may be used in the HP41 WITH extended I/O (HP82183A ROM module) that allows the HP41 to access all 630Kbytes in a disk.
As mentioned by Dan (he wrote an article about file formats and HPIL file streams) one must take care about disk names when disk data will be read in a PC. HP71 and HP75 allow name volume, but disks "formated" with an HP41 as a controler will have no label. Standard programs that read disks generated this way will not recognize HP41 generated disks.
Hope this helps.
Luiz C. Vieira - Brazil
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