Posted Mon Mar 6, 2006 4:54 PM
Well,
the HYPROM-A is indeed for 5,25" versions and B is for 3,5" versions (if I remember correctly). There are several options available when booting the drive (drive door open, no disk inserted) - until the menu appears:
ABCDFMSX 16 ESC
ESC - press escape key to reboot
1,6 - press key 1 or 6 to use the Hyper-XF SIO in page 1 or page 6
(memory $0100 or $0600 just like the good old turbo-disk-drives!)
A,B,C,D: press any of these keys to access that partition (only if disk is partitioned
of course!)
F: press the F key to access all four partitions (ABCD or better d1:-d4:) at once and do a density/format check for each partition (good for partitions with mixed densities)... hint: good for AR-the dungeon which supports 4 drives and 128k computers (the main program side 1 is copied to the extra ram, the remaining disksides 2-5 now load off of a 3,5" multi-partitioned disk without any need of disk-changing!)
M: press the M key to access all four partitions at once (d1:-d4:)
S: press S key to access a 720k disk formatted in ST or PC format
(alas, this requires extra software which never became available! the drive
would have to split the ST/PC 512byte sectors in two halves of 256 bytes then,
thus reading such a disk would take quite some time...)
X: press the X key for normal XF551 mode (no partitions, just the 4 standard densities: 90k, 130k, 180k and 360k)
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Well, if you load Hypmode.COM (don`t forget the RUN or Init adress at $0180 if I remember correctly!) - it seems to hang at first, don`t worry, you simply have to type two keys here: 1) drive number (d1: - d4:) and 2) mode letter (ABCDFMSX).
So for example one may type 1 and then F and return to DOS then...
Yes, it is true that partitions can only be used in single-sided densities, so you *cannot* use two 360k partitions on a 720k disk. There are only the densities 90k (single), 130k (medium/enhanced) and 180k (double) available. but these were (or maybe still are) the standard Atari disk densities. And the densities can be mixed (f.e. part. 1: SD, part. 2: ED, part. 3: DD, part. 4: ED) on a partitioned disk. this way, one may copy most of the existing PD/Freeware/Shareware programs to 3,5" disks without the need to change the density (hint: it is not always easy to copy a 130k bootdisk to a 720k disk, using a partition there is much easier)...
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But the partitions have one dis-advantage: There exist programs that use multiple disk-sides, but only disk-side 1 (or A) is bootable. With a 5,25" disk one may simply turn over the disk. With a partitioned 3,5" disk this is not possible! (And as soon as you try to load in Hypmode.COM to reach another partition, the program-code of this bootable disk-side 1 is gone, meaning you now can reach another disk-side but it is not bootable.) Afaik, the only solution to get rid of this, is to install a switch on the Hyper-XF disk-drive (connected to the FDC!), so one can switch the partitions via hardware (or one may install an alternative OS into the Atari computer, like QMEG-OS by the same author as Hyper-XF-OS, and then switch the partition via OS, again a hardware-switch!)...
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Anyway, since 3,5" disks are no standard for A8 computers - and will never be - you can only do some private backups to such disks/drives. Or you collect your complete disk-archive on such disks - but there is no easy way of exchanging disks with other users then (especially those, that do not have 3,5" drives)... so, sooner or later you are copying some/most programs back to 5,25" disks...
and err, well, even 3,5" disks are limited (if you have, say 1000 disks 5,25", you may copy them all to 3,5" disks, this will reduce the number of disks by 50% but there are still 500 disks in 3,5" format then). So sooner or later you will try to use better alternatives (harddisks, CF-cards, micro-drives, CD`s, DVD`s, SIO2PC/APE or other emulators, etc. etc.). Thinking of these dis-advantages I gave up copying all my 5,25"disks to 3,5" and in the end I even sold my 3,5" XF drive (in favor of a harddisk and sooner or later in favor of CD/DVD)...
but these are just my personal opinions. anyone may choose the media for A8 computers (to load/boot programs) he likes best... -Andreas Magenheimer.
P.S.: I "created" this XF551 and Hyper-XF utility disk by collecting all the stuff I could find for these drives... if you have some more stuff (you would like to be added), let me know - or better send me a copy of that stuff (so I can add it to these disks)...