- Moved basic BitBlt stuff from the Cirrus code to a separate header file to
make it usable for the Voodoo Banshee, too.
- Rewrite of the screen-to-screen BitBlt code for the new ROP code.
- Calculate redraw parameters based on the screen start.
- Set "Banshee busy" bit in the status register when 2D is busy.
- Added some error messages for unimplemented features.
- Host-to-screen and screen-to-screen copy operations implemented (ROP 0xcc).
- Rectangle fill command now handles clipping.
- Attempt to fix the redraw_area() location after bitblt operations.
- Update the host palette entries when writing to CLUT (fixes screenshot).
- Added 2D register names for debug messages.
- Fixed hardware cursor bottom/right edge display bug.
- Started splitting 2D code in different methods (no functional changes).
- Added hardware cursor to save/restore list.
TODO #1: Implement bitblt engine similar to the Cirrus one.
TODO #2: Voodoo code reorganization: base class with Voodoo core, one subclass
for Voodoo1/2 and one for Banshee.
in 8 bpp mode, but it's not yet usable (no cursor, no text). List of changes:
- Added AGP/CMD/Misc register handling (CMDFIFO #0 is now usable).
- Started work on 2D register handling ("Rectangle fill" command implemented).
- Added Banshee specific code in redraw_area().
- Writing to VGA DAC registers also modifies the Banshee CLUT.
- Banshee now indicates that no TV-out and video-in device is connected.
- Some other related fixes and improvements.
- Added VCLK array and removed hardcoded values.
- Added new method get_crtc_params() to retrieve htotal and vtotal values.
- Cirrus: Set up VCLK registers with default on reset (TODO: VGABIOS should do
that when setting video mode).
- Voodoo Banshee: Set up VCLK #3 when writing to pllCtrl0 register. VCLK #0 and
#1 are VGA compatible and VCLK #2 is fixed 50 MHz. Fixed maximum resolution
based on PLL section of the spec.
function. I guess the old stuff should be a speed optimization, but I don't see
a difference with the new code. The simulation output is also still the same.
Now Bochs compiles much faster with Voodoo support enabled and the binary is
much smaller. This patch has been written by Luigi B.
- Banshee Memory layout implemented (AGP/misc and 2D register behaviour not
implemented yet). Now Win95 with Banshee driver can boot in standard VGA mode.
- Fixed memory allocation: Banshee has 16 MB shared LFB / TMU memory.
- Some work on save/restore support.
- Renamed Banshee VGA register handlers.
- tile-based VBE graphics updates implemented
- "half mode" support added (line doubling for low resultions)
- change screen resolution only after re-enabling the video processor
"Voodoo VGA" framework. Most of the work is still to do.
- Added Banshee specific PCI write handler and related stuff. The device is
initialzed properly by the Bochs BIOS (mem, lfb, rom and i/o).
- With Banshee specific VGA BIOS it passes the init stage and boots properly
to DOS. Parts of the init code coming from file "voodoo.h.txt" (part of the
original patch).
- Standard VGA modes are all usable (using the Bochs VGA core).
- VBE graphics modes with 8, 16, 24 and 32 BPP are usable (VBE drawing code is
mostly copy&paste from the Bochs VBE code. DAC 6/8 bit switch is present.
- TODO list:
- Voodoo Banshee memory layout (registers, 2D, 3D, LFB, textures)
- 2D graphics engine must be written from scratch
- interaction between new device and existing 3D core
- non-VGA mode (Voodoo model "banshee" without VGA extension "voodoo")
- save/restore support, move Banshee stuff to separate file, ...
- Fixed missing bx_gui->flush() call after non-VGA update().
- Fixed a BX_DEBUG message in the Voodoo code.
- Re-define LOG_THIS for messages in the "Voodoo VGA" code.
currently only implements an ISA standard VGA adapter with the selected Voodoo
model as it's extension. The methods of the "Voodoo VGA" device only call the
required methods of the Voodoo or VGA core.
TODO: Start implementing the Voodoo Banshee chipset based on this code.
- Treat VGA extension name other than "none", "vbe" or "cirrus" as a VGA
compatible device plugin and try to load it.
- Added new plugin type PLUGTYPE_VGA for such a plugins (interally handled like
a core plugin).
- Added panic in devices init for the case no VGA compatible plugin is present.
- Added new method vga_redraw_area() that handles the non-VGA and null size
case. The specific method redraw_area() is called otherwise.
- Moved init_systemtimer() call from extension code to init_standard_vga().
- TODO: Implement VGA subsystem in the Voodoo code to test the new feature.
Voodoo Banshee 2D accelerator code needs to be written to make this really
useful.
- Added support for setting memory write handler to NULL (ROM case).
- Added new PCI device method after_restore_pci_state(). It currently handles
the PCI ROM case only (could be extended).
- Moved VGA timer handler to the VGA core and handle the non-VGA case there.
It calls the specific update() code and finally bx_gui->flush().
- Moved the VGA update frequency parameter handler and the refresh_disply()
method to the VGA core.
- Store the VGA extension parameter in the VGA core.
- Voodoo: Fixed graphics snapshot.
- Fixed probing the CMDFIFO with Voodoo output disabled (send FIFO wakeup
directly, otherwise driven by vertical retrace).
- Use the CMDFIFO member 'enabled' instead of reading the fbiInit7 register bit.
- TODO: The Voodoo2 freeze when testing a Voodoo1 demo is still not fixed.
- voodoo_init() must be called after initializing FIFO mutex.
- The 'op_pending' counter must be reset after resetting FIFOs.
- Fixed an MSVC warning and removed obsolete comment.
- FIXME: There are still some conditions that can freeze the Voodoo display.
it's 64 entries is still not present, since it makes the emulation a few
percent slower due to the overhead of the FIFO code. The memory FIFO has 64k
entries and makes a speedup of around 75 % possible.
