SebRmv 2 Report post Posted October 27, 2009 Are there here some blitter gurus who can answer these few questions: - what is the right way to fill a buffer with a constant value ? 1-use B_SRCD to set fill pattern and work with LFU_S ? 2-use B_DSTD to set fill pattern and work with LFU_D ? 3-use B_PATD to set fill pattern and work with PATDSEL ? - what is the right way to apply a logical operation to a buffer (for instance XORing with 0x80) ? 1-use B_SRCD to set constant value and work with LFU_S_XOR_D|DSTEN ? 2-use B_DSTD to set constant value and work with LFU_S_XOR_D|SRCEN ? (this latest solution implies that A1 = A2) 3-err, no... this does not work with B_PATD Thanks! Quote Share this post Link to post Share on other sites
SCPCD 0 Report post Posted October 27, 2009 - what is the right way to fill a buffer with a constant value ? 3-use B_PATD to set fill pattern and work with PATDSEL ? - what is the right way to apply a logical operation to a buffer (for instance XORing with 0x80) ? 1 or 2, I don't think that this will change something significaly. Quote Share this post Link to post Share on other sites
SebRmv 2 Report post Posted October 28, 2009 1 or 2, I don't think that this will change something significaly. Ok, thanks Actually, I asked that because I suspect there is a (very rare & unpredictible) bug in the blitter when using B_SRCD as logical mask which affects memory transfers. Quote Share this post Link to post Share on other sites
SebRmv 2 Report post Posted October 28, 2009 Never say blitter is bugged! It's always the programmer's own fault! I FOUND THE BUG :yes: :yes: Quote Share this post Link to post Share on other sites
