the address offset between two lines on the screen in all VGA modes.
It depends on the CRTC offset register value and the address mode (byte, word,
dword)
- moved screen update code to the end of the write handler. If a register change
should force a redraw of the screen, the variable 'needs_update' must be set
to 1.
- changes to the attribute controller palette index register now force a redraw
of the screen
- modeX: calculation of the tile numbers fixed
* check memory mapping before everything else
* read mode 1 optimized using a part of patch.vga-mode2-speed-dohzono
- function mem_write(): check memory mapping before everything else
- writes to the CRT registers are handled only if the new value differs
- a CRT start address change forces a redraw of the screen
with 100 rows and a char height of 4
- raster operations AND, OR and XOR in write mode 2 implemented (part of patch #707931)
- use the vga_tile_updated array in modeX like other modes do
- small optimizations in the graphics update code
I've got a game that uses OPL2 functions. It's still not
working yet, but this patch brings it closer. Using Jeffrey S.
Lee's "Programming the AdLib/Sound Blaster FM Music Chips (Ver
2.0)"[1] as a reference, I found an inversion of the OPL timer
masks in the sb16 code. Without this patch, the emulator uses
the wrong bits for masking, and completely botches the flags
register (note the bitwise AND vs OR).
double width)
- cleanup in modeX emulation similar to mode 13h
- consider start address in function mem_write for VGA modes
- register 0x03c8 is readable, too
- clear tile array when switching to graphics mode, clear text snapshot when
switching to text mode, do the same when changing the palette or disable video
- simplified the function determine_screen_dimensions()
- fixed the code for the CGA mode 640x200x2 in update() and mem_write()
- it works only on x86 with gcc2.95+
- uses the GCC function atribute "regparm(n)" to declare that certain
functions use the register calling convention
- performance improvement is about 6%
and improved by Christophe Bothamy and Volker Ruppert)
Comment from the author:
Attached is a "patch" file detailing what you need to do
to add USB support (UHCI only for now) to your existing
Bochs (2.0.xx) source code.
I use Win32 and VC++ but the source and modifications
should be platform and compiler independant.
Please let me know if this patch some how breaks the
build process of your compilation (Bochs 2.0.0 or above
only).
I would also like any feedback on how this code works
(or doesn't work) on your platform and within your
images. If you explain in as much detail as you can on
how it did or did not work, I will try to add to the source
to help it work on all platforms and images.
- new symbol BX_USE_PCIVGA_SMF for the experimental PCI VGA device
- pcivga.cc: removed unnecessary include statement
- pcivga.cc: fixed two warnings
- pcivga.h: removed unnecessary symbol BX_IODEV_PCIVGA_H
- implementation of the UIP bit using a new timer handler. The one_second_timer()
function only sets the UIP bit and starts the UIP timer. The uip_timer()
function handles the date / time update, the alarm check and finally clears
the UIP bit.
- writing to control register A doesn't change the UIP bit
palette - it's an index to the attribute controller palette index.
The new function get_actl_palette_idx() now returns the real DAC index.
The guis sdl, wx and x11 are using the new function. TODO: Fix this bug in
all other guis.
things up for MacOSX, and I don't want to risk that right now just before
the release. I changed it to #if BX_WITH_MACOS to be safe.
(Bochs makefiles currently define -Dmacintosh on OSX. Maybe they
shouldn't but I'm not going to change it right now.)
be zero. I changed it to #ifdef macintosh.
- removed extern "C" {} that only encompassed two #defines. If there
were any includes in there it would be important, but there weren't.
* missing VBE support added, use xmax / ymax variables instead of the
values 640 / 480
* use the constant Y_TILESIZE when checking the y position
* variable vga_mem_updated was always set twice
This version is a bit of a hack that needs to be cleaned up before release.
There is also a glaring bug that lets things go WAY too fast when
we're trying to catch up to real time. This is my highest priority
right now.
register values to a new timeval after date/time change. There is only a
BX_ERROR for now.
- added separate cases for the alarm time registers and a BX_DEBUG message that
reports the new alarm time.
unsigned 64-bit integer and 64-bit double precision floating point. It
knows how to convert Bit64s to double, but it refuses to convert Bit64u
to double. The macros: F2I converts from floating point to integer, and
I2F converts the other way, using Bit64s as a transition step.
F2I: double -> Bit64s -> Bit64u
I2F: Bit64u -> Bit64s -> double
. read port 0x70 (cmos) : return index
. atapi function 46 and 4a : return error
- put back the log prefix for cmos that disappeared when we did the plugins
to make Bochs compile on DJGPP.
- put references to SIGSTOP and SIGTSTP in #ifdefs
- add definition of BX_CD_FRAMESIZE and CD_FRAMESIZE
- look for curses functions in -ldcurses
Modified Files:
gui/term.cc iodev/cdrom.cc configure.in configure
- moved ne2k presence check to devices.cc
- added special make rules for the ne2k and the lowlevel network support
- added macro for the debug feature of the ne2k
For a whole lot of configure options, I put #if...#endif around code that
is specific to the option, even in files which are normally only compiled
when the option is on. This allows me to create a MS Visual C++ 6.0
workspace that supports many of these options. The workspace will basically
compile every file all the time, but the code for disabled options will
be commented out by the #if...#endif.
This may one day lead to simplification of the Makefiles and configure
scripts, but for the moment I'm leaving Makefiles and configure scripts
alone.
Affected options:
BX_SUPPORT_APIC (cpu/apic.cc)
BX_SUPPORT_X86_64 (cpu/*64.cc)
BX_DEBUGGER (debug/*)
BX_DISASM (disasm/*)
BX_WITH_nameofgui (gui/*)
BX_SUPPORT_CDROM (iodev/cdrom.cc)
BX_NE2K_SUPPORT (iodev/eth*.cc, iodev/ne2k.cc)
BX_SUPPORT_APIC (iodev/ioapic.cc)
BX_IODEBUG_SUPPORT (iodev/iodebug.cc)
BX_PCI_SUPPORT (iodev/pci*.cc)
BX_SUPPORT_SB16 (iodev/sb*.cc)
Modified Files:
cpu/apic.cc cpu/arith64.cc cpu/ctrl_xfer64.cc
cpu/data_xfer64.cc cpu/fetchdecode64.cc cpu/logical64.cc
cpu/mult64.cc cpu/resolve64.cc cpu/shift64.cc cpu/stack64.cc
debug/Makefile.in debug/crc.cc debug/dbg_main.cc debug/lexer.l
debug/linux.cc debug/parser.c debug/parser.y
disasm/dis_decode.cc disasm/dis_groups.cc gui/amigaos.cc
gui/beos.cc gui/carbon.cc gui/macintosh.cc gui/rfb.cc
gui/sdl.cc gui/term.cc gui/win32.cc gui/wx.cc gui/wxdialog.cc
gui/wxmain.cc gui/x.cc iodev/cdrom.cc iodev/eth.cc
iodev/eth_arpback.cc iodev/eth_fbsd.cc iodev/eth_linux.cc
iodev/eth_null.cc iodev/eth_packetmaker.cc iodev/eth_tap.cc
iodev/eth_tuntap.cc iodev/eth_win32.cc iodev/ioapic.cc
iodev/iodebug.cc iodev/ne2k.cc iodev/pci.cc iodev/pci2isa.cc
iodev/sb16.cc iodev/soundlnx.cc iodev/soundwin.cc
For years we have been writing beyond the end of this array in the VGA code:
bx_bool vga_tile_updated[BX_NUM_X_TILES][BX_NUM_Y_TILES];
and doing who-know-how-much damage to other memory structures in the process.
I changed every reference to vga_tile_updated[][] into calls to two macros
GET_TILE_UPDATED and SET_TILE_UPDATED, and defined the macros to check
the bounds of the array before referencing it. At first I used an
assert, then a panic, then an error, and now I'm not printing any message
at all because there were thousands and thousands of messages during
a boot of win95 when it's updating the win95 logo screen.
- I couldn't resist cleaning up a few confusing-looking things like
"if (condition) { // }". There are no functional changes except for
bounds checking on the vga_tile_updated array.
- plugins are installed into ${plugdir} which is defined to be
${libdir}/bochs-${VERSION}/plugins.
Modified Files:
Makefile.in plugin.cc configure.in configure gui/Makefile.in
iodev/Makefile.in
The cmos function get_timeval is only used by the pc_system
to print the last system time on exit. We should remove the
STUBFUNC() macro and simply return 0.
a control panel, but now we're calling it a text configuration interface.
Modified:
.bochsrc Makefile.in bochs.h main.cc cpu/Makefile.in
debug/Makefile.in disasm/Makefile.in fpu/Makefile.in
gui/Makefile.in iodev/Makefile.in memory/Makefile.in
- if translation=auto :
. translation=none if cylinders <=1024 and heads <=16
. translation=large if cylinders * heads <= 131072
. transaltion=lba otherwise
- changes default translation value to "auto"
- add example in .bochsrc
