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Firmware


U64

Latest Firmware for the U64 is version 1.0B Click here to download

Differences with previous official release V1.06

  • SID has been improved quite a bit.
    • The internal SID is now consistently referenced as "UltiSID", to avoid confusion with other SID products.
    • Various bugs, like the phase of the filters, and the routing of Voice 3 when the VOICE3OFF bit was set have been corrected.
    • A number of SID filter curves have now been implemented and can now be chosen from the configuration menu.
    • The resonance can be changed to two different settings.
    • Combined waveforms can now be selected between 6581 and 8580.
    • Internal bus charge in the SID is now emulated.
  • The 6502 core has been improved. All 'stable' illegal instructions are now fully operational:
    • SLO $07 $17 $03 $13 $0F $1F $1B
    • RLA $27 $37 $23 $33 $2F $3F $3B
    • SRE $47 $57 $43 $53 $4F $5F $5B
    • RRA $67 $77 $63 $73 $6F $7F $7B
    • SAX $87 $97 $83 $8F
    • LAX $A7 $B7 $A3 $B3 $AF
    • DCP $C7 $D7 $C3 $D3 $CF $DF $DB
    • ISC $E7 $F7 $E3 $F3 $EF $FF $FB
    • ANC $0B
    • ANC $2B
    • ALR $4B
    • ARR $6B (including decimal mode!)
    • SBX $CB
    • SBC $EB
    • LAS $BB
    • LAX $AB is stable with constant 00.
  • U64 settings are now restored when the machine resets. This resets the SID settings after using Auto Config + internal SID player.


Ultimate 2+

Soon the latest firmware for U2+ and U2 will also appear here. (work in progress)