A new firmware update for the ARM2SiD/ARMSID has been released by Nobomi.

ARM2SID firmware 3.12:

• Digifix in MOS8580 emulation is now configurable. By the software it can be set to a several levels including inverse polarities.
• The Digifix is controlled by external pin current by default (as a real MOS6581 is). If you miss it, just set it by the configuration program as you want.
• Digifix for MOS8580 is required for example in the Ghostbusters game, but most of the games, demos and music (specially new ones) is not counting with Digifix and can produce some additional noises and hum.
• In this FW is finished the hotfix in noise generation (test bit) from previous FW, now is no sound missing for example in the TestBit_4x.sid.
• Big improvement in 6581 emulation. Fixed inner analog offsets in the MOS6581 emulation. Less distortion in some demos (for example Mahoney – Musik Run/Stop) and no more clicks in some games music (for example Bubble Bobble).
• Fix in tone counter updates during fast changes.
• Fixed setting of the lowest filter frequency for MOS6581 emulation (sometimes the simulation did not match the settings).

ARMSID firmware 2.12:

• Fixed setting of the lowest filter frequency for MOS6581 emulation (sometimes the simulation did not match the settings).
• Remember the “Digifix” update from the previous version, if something sounds different to you on the MOS8580 emulation, please check the configuration.

Previous changelog of ARMSID firmware 2.11:

• Digifix in MOS8580 emulation is now configurable. It can be set to few levels including inverse polarities.
• Digifix is now controlled by external pin by default (as a real SID is). You can change it in config utility.
• Digifix for MOS8580 is required for example in the Ghostbusters game, but most of the games, demos and music (especially new ones) do not expect Digifix and can produce some additional noise and hum.
• Improved noise generation (test bit) from previous FW, no sound missing for example in the TestBit_4x.sid.
• Fixed inner analog offsets in the MOS6581 emulation. Less distortion and no more clicks in some music.
• A small fix in tone counters updates in the fast changes.
• Faster release of the data bus after reading cycle.

Download:

• ARM2SiD v3.12 (673)
• ARMSiD v2.12 (613)

source: nobomi.cz/8bit/arm2sid nobomi.cz/8bit/armsid