Micro64 1.00.2011.11.13 Build 620 is released. Micro64 is a freeware commodore c64 emulator. Currently micro64 has two different VIC II emulation modes: cycle exact (default, works fine) and half-cycle exact (next-gen, rudimentary implementation – currently damn slow).

Micro64 1.00.2011.11.13 Build 620 Changelog:
- Added "SID brightness" setting (from 0\% for dark to 100\% for light)
- Reworked SID waveform generator output + envelope generator output multiplying virtual-DAC code part. It uses now a PremultipliedDACTable[EnvelopeGeneratorOutput,WaveformGeneratorOutput] array with premultiplied 64-bit double floating point values and truncated as 32-bit integer values for more performance and for more accurate premultiplied values at the same time (besides the maybe more bad CPU cache usage now (more CPU cache read misses), due to the much larger size of the array now) (the result array value will passed to the filter code part), instead of WaveFormDACTable[WaveformGeneratorOutput]*EnvelopeDACTable[EnvelopeGeneratorOutput] (both were arrays of to 32-bit truncated integer values of 32-bit floating point values) as it was before this change.
- Implemented the 8580 filter in 32-bit x86 inline assembler for the 32-bit Delphi windows build of micro64, the 32-bit x86 FreePascal and 64-bit FreePascal x64 linux builds uses still the pure object pascal implementation of it. The reason for this is that the Delphi compiler don't support a signed shift right operator or instrinc function (only a unsigned shift right), FreePascal do have for this the SARLongint instrinc function with a compiler patch from me a long time ago. And the 6581 filter code is and will be pure object pascal code, because this code part for the 6581 filter stuff is bigger than the code for the 8580 filter stuff (due to the various more complex analog part simulation stuff at the 6581 filter) to reimplement this also in a reasonable way in plain inline assembler, so that the expense would be greater than it would be worth it.

Download: Micro64 1.00.2011.11.13 Build 620
Source: Here