1 or 2 hard disks.
- int13: check how many disks first, and only return an error if DL exceeds
the number of disks (ignoring bit 7 of course)
- added drive number arg to get_hd_geometry, so that get_hd_geometry can
retrieve the numbers corresponding to hard drive 0 or 1
- hard_drive_post will now set up the EBDA area for drive 0 if it exists,
then for drive 1 if it exists.
- made the code that fills 0x1b-0x23 for diskc conditional on diskc being
present; this was probably not necessary.
- added some code (still commented out) that will help in supporting a second
IDE interface.
since at present there's no way to actually manage this. To use both,
we will need to put the cdrom (or diskd) onto second ide controller with
a different IRQ.
Basicly what it does is, it help VGA16 find the syncing, because of the
technique it uses, bochs did not help it figure out the timing diffrences
with its one size fits all timing.
The 82c54 model (pit.cc) implements timer modes 0, 2, and 3 in its handler
functions, without caring which timer number is involved. However, the
I/O write code that sets the mode is inconsistent.
Timer 0 can be set to modes 0,2,3 only.
Timer 1 can be set to mode 2 only.
Timer 2 can be set to mode 2,3 only.
From a quick reading of an 8254 datasheet, I can't see any reason to
restrict which timer can be in which mode, so I think it's correct to
allow ALL timers to go into ALL modes that are implemented.
unfortunately is the same as the C library function fabs. Many
compilers seem to use the static one with no complaint, but others
don't like it. Just rename fabs, to eliminate the potential
conflict.
For compilers (such as Microsoft VC++) which don't allow "LL" after a
constant to make it 64-bit, this patch declares all such constants as
BX_CONST64(value). Then in config.in, a switch called
BX_64BIT_CONSTANTS_USE_LL controls whether the macro puts the
LL's in or not. Configure sets the macro, if you're on a platform
that can run such things.
- use Bit64u and other compiler-independent types
- moved contents of macutils.* into osdep.*.
- now in osdep.h, I allow all code to use the real library function name.
If that function is not available, #define it to point to the
bx_* replacement function instead. And cause the bx_* replacement
function to be compiled in osdep.cc.
