A new version of the firmware for the Ultimate-64 by Gideon is released.

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.

Download:

• U64/Ultimate-64 v1.0B Firmware (627)

source: ultimate64.com