Fix the PDC rendenzvous code to clear all pending external intrrupts
before entering the waiting loop.
Without clearing them before, the CPU was waken up immediately again.

This fixes the CPU hotplug on Linux, which can be run with
    chcpu -d 2  # to disable CPU2
    chcpu -e 2  # to wake up CPU2

Signed-off-by: Helge Deller <deller@gmx.de>

Signed-off-by: Helge Deller <deller@gmx.de>

Add additional fonts to STI ROM.
They can be selected with qemu command-line options:
    -fw_cfg opt/font,string=1       - a HP 8x16 font
    -fw_cfg opt/font,string=2       - a HP 6x13 font
    -fw_cfg opt/font,string=3       - a HP 10x20 font
    -fw_cfg opt/font,string=4       - a Linux 16x32 font

Signed-off-by: Helge Deller <deller@gmx.de>

New features and fixes:

* Fix firmware rendenzvous code to clear all pending external intrrupts
  before entering the waiting loop.

* STI firmware now contains additional fonts built-in, which
  can be selected with qemu command-line options:
	-fw_cfg opt/font,string=1	- a HP 8x16 font
	-fw_cfg opt/font,string=2	- a HP 6x13 font
	-fw_cfg opt/font,string=3	- a HP 10x20 font
	-fw_cfg opt/font,string=4	- a Linux 16x32 font

Signed-off-by: Helge Deller <deller@gmx.de>

Add the CONSOLE_DEFAULT constant to make the decision which I/O console to use
easier to understand.

Signed-off-by: Helge Deller <deller@gmx.de>

lasips2_kbd_in() is used to read input from an emulated PS/2 keyboard.
Since there is no interrupt support durig PDC/IODC we need to poll the
PS/2 status flags to see if a new key was pressed.  In order to be able
to poll regularily, exit the loop to read already pressed chars as soon
as possible. This can be done by calling handle_16() with register ah =
0x11 to check if keys are queued up and exit if none are available.

This patch fixes the problem that keys couldn't be read when using a
graphical output (artist graphics). This patch fixes palo and other
bootloaders to be able to use input from the emulated PS/2 keyboard.

Signed-off-by: Helge Deller <deller@gmx.de>

Finally add the real boot menu.
If qemu is started with the "-boot menu=on" option, the PDC boot menu is
shown and the user can then boot any of the available SCSI disc/CDs.
Just type "BOOT" (to boot the default device), or "BOOT FWSCSI.4" (to boot
SCSI device #4).

Signed-off-by: Helge Deller <deller@gmx.de>

New features and fixes:

* Fixed SeaBIOS PS/2 keyboard support.

  This now allows to use the qemu "-boot menu=on" option to start the
  firmware boot selection menu and provide a working menu with keyboard on
  serial (qemu "-nographic" option) and PS/2 keyboard (qemu "-graphic"
  option) on graphical screen.