Ignore:
Timestamp:
Aug 29, 2012, 12:59:23 PM (13 years ago)
Author:
krille_n_@…
google:author:
krille_n_@hotmail.com
Message:

Changes:

  • A speed optimization to the eSHL_IM macro for 386 and higher. This change breaks emulation in the sense that the macro will fail when given a memory operand as the first parameter.
  • Memory_SumCXbytesFromESSItoAL now returns with the zero flag set/cleared according to the result.
  • Unrolled all the 8 bit READ transfer loops to do 16 bytes per iteration. Added a new macro (UNROLL_SECTORS_IN_CX_TO_OWORDS) as part of it. Size wise this is expensive but I think it should be worth the ROM space. The WRITE transfer loops were left as is since writes are rare anyway (<10% of all disk I/O IIRC).
  • Minor optimizations and fixes here and there.
File:
1 edited

Legend:

Unmodified
Added
Removed

  • trunk/XTIDE_Universal_BIOS/Src/Device/IDE/JrIdeTransfer.asm

    r419 r445  
    121121    jc      SHORT ReturnWithMemoryIOtransferErrorInAH
    122122
    123     ; All rectors succesfully transferred
     123    ; All sectors successfully transferred
    124124    add     cx, [bp+PIOVARS.bSectorsDone]       ; Never sets CF
    125125    ret
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