DS2x86 version 0.34 released!

February 27th, 2012, 02:28 Posted By: wraggster

via http://dsx86.patrickaalto.com/DSblog.html


This version has the following changes and improvements:

• Improved SoundBlaster emulation using the new transfer system. Now the transfer of the SoundBlaster digitized audio data from the MIPS side to the ARM side works properly, I believe. However, there are still problems and missing features in the actual SB emulation on the MIPS side, so not all games play SB audio correctly yet.
• Improved high-resolution (>= 350 rows) graphics modes scaling quality. The graphics data is now interlaced when it is sent from the MIPS side to the ARM side. Interlacing video signals is the traditional method of reducing the required bandwidth by a factor of two while keeping the same line count and frame rate. Since the low bandwidth of the card interface is the main problem with the MIPS/ARM communications, interlacing the graphics will minimize the effect of this low bandwidth.
• Implemented preliminary VESA SVGA support, for 640x400 and 640x480 256-color modes. The only games I have tested this with are LineWars II and Ascendancy. Other SVGA games might not work properly yet, but feel free to test them!
• Implemented a "scasb" opcode version that accesses EGA VRAM. This opcode is used by the game Titus the Fox.
• Fixed a bug in "shld r/m16,r16,imm8" and "shrd r/m16,r16,imm8" opcodes, when the shift count was larger than 16.
• Fixed a bug in "idiv r/m16" opcode which could destroy the high 16 bits of EAX register.
• Fixed the VideoParameterTable to have correct VGA Misc Register values in text modes. Before this fix the register reported that the attached monitor is a monochrome monitor. This might have caused some games to either show grayscale graphics, or hang in the vertical retrace detection (which uses a different register address in monochrome systems).
• Minor changes to mouse emulation, for better support of SVGA graphics modes.

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