Alesis D4 OS v1.04 EPROM Firmware Upgrade KIT

• OS v1.04 is the last known firmware revision issued by Alesis for the D4.
• Included will be 1 new EPROM chip, which will be labeled accordingly to indicate which IC socket the EPROM is to be installed to.

Keepin mind that the D4 itself is not for sale, only the EPROM chip is.

Alesis D4 v1.04 update notes:

• A bug existed (in v1.03 only) that could crash the machine if a flurry of notes were sent to the D4 and if some of the voices assigned to those notes were set to SINGLE, GROUP1, or GROUP2 mode. This is now fixed.
• The system exclusive receive routine has been modified so that the time out period used to detect unplugged midi cables and unfinished system exclusive messages is now 250mS instead of 80mS as in earlier versions. This was done to allow slow computers more time while transmitting to the D4 before the D4 panics and aborts the sysex load. In addition, the LCD will now correctly display the "MIDI BUFFER OVERFLOW" message when the buffer overflows during sysex reception instead of the "SYSEX DATA ERROR" message.
• The signal threshold for the diagnostics trigger self-test has been lowered even further to keep units from failing unnecessarily in repair.

Rest assured that all EPROM upgrades I send are packaged in anti static reusable packaging and inserted into a bubble mailer.

I send all international packages via airmail parcel in order to ensure that your EPROMS arrive safely and in a reasonable time frame. If you want your EPROMS to be sent via international letter mail and have it arrive over a month later possibly damaged, then check elsewhere, thanks.

Purchase with confidence!

Check out my other auctions, I have spare parts for other samplers and synthesizers too!

Any questions? Drop me a line, thanks.