If you discover any new bugs or do have any other problems please report them
via the bugtracker at
- There is a general problem with all extra hardware connected to the Amiga
which generates Interrupts at random or regular times. An example is my
network card (Hydra). If I have my TCP/IP stack running, nearly every
installed program will freeze after a short time because the card creates
PORTS interrupts (the same type as interrupts created by the keyboard) which
cannot correctly replied to by the installed program. This is because as soon
as the request has been acknowledged with an rte, the next interrupt occurs.
To avoid this problem, the TCP/IP stack must be stopped before starting WHDLoad.
In the same category are falling USB-stacks (use "AddUSBHardware REMOVE ALL"
for Poseidon) and the Voodoo interrupt of Mediator boards (you have to set
"VoodooInt = No"). Starting WHDLoad version 16.8 there is a built-in work around
for the interrupts created by Mediator boards, therefore no special settings are
Using Picasso96 versions equal or greater than release 1.36 also the graphics
card Spectrum creates such interrupts. To avoid this the Picasso96 software must
be reverted to a pre 1.36 release or the gfxcard driver must be disabled.
- If you get errors concerning reading/writing of files check that your hard
disks are correctly configured. WHDLoad reads large chunks of data (>1 MiB) which
may easily show up improper configurations although other applications seems to
work fine. That means make sure that the setting of MaxTransfer and Mask in
HDToolBox on all partitions are correctly set. A safe value (for awkward
hardware) is MaxTransfer = 0x07FEC and Mask = 0x07FFFFC. This applies
especially to cards in the PCMCIA slot and to IDE-CF-card adapters.
Another reason for problems can be memory allocations. There are configurations
which have problems with Reverse memory allocations. In such a case WHDLoad can
be forced to not use the Reverse mode by setting the NoMemReverse/S option.
- If you are using the Picasso96 software you must make sure that the
option FakeNativeModes is set to NO (tooltype of the monitor driver).
Otherwise there will be graphics errors and maybe crashes.
- There are some rare hardware configurations which don't support the MMU
related features of WHDLoad. The only systems affected are 68030 based ones. The
option MMU/S must be not enabled on these systems! If
the option is set, WHDLoad will freeze the whole machine. Currently the
following hardware is known to cause problems: accelerator boards "Apollo
A630", "Apollo 1230", "Elbox 1230" and "Magnum MK2".
- There seems to be problems with RAM expansions via PCMCIA on A1200.
WHDLoad may show error requesters like Dos error #235 (executable not valid)
on loading "xxx.slave". The reasons seems to be that the memory is incorrectly
bound into the system memory lists, because WHDLoad attempt to allocate
memory using the flag MEMF_REVERSE and gets an invalid return value (pointer to non
existent memory). It's not known if this happens only with specific cards or under
- The operation of switching between the operation system (OS) and the
installed program is not completely reliable. The problem is that most Custom
registers and some CIA registers cannot be read and therefore cannot be saved
and restored. WHDLoad itself does not change these registers, but when it
switches from the installed program to the OS (e.g. to load a file from disk)
the OS may change some of these not restorable registers. If the installed
program depends on all registers remaining unchanged, this will cause
problems. It is known that the OS changes at least cop2lc, bltafwm and
bltalwm, and perhaps more. As a workround for this problem there is a
possibility to restore the changed registers during the switch sequence. See
WHDLTAG_CBSWITCH_SET for more