Description: Alesis D4 OS 1.04 EPROM Firmware Upgrade KITThis upgrade version 1.04 is the latest and final firmware update issued by Alesis for the D4.Included will be 1 new ATMEL EPROM chip, recently manufactured to ensure data integrity well past our natural lifetime.I do not use 35+ year old UV EPROMS that are prone to bit rot, a major cause of data instability with vintage equipment of this era.Keep in mind that the D4 itself is not for sale, only the EPROM upgrade chip will be supplied.Unlike some others, No used or refurbished as “new” components will be supplied here.Some of the changes and improvements included in update 1.04 are as follows: 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.If requested - A link will be e-mailed to you with the D4 service manual for your own personal reference. I find this to be quite useful and informative.Be sure to take note of the marked orientation notch on the side of the EPROM to ensure correct installation. EPROMS inserted backwards will be destroyed. Incorrect insertion of ICs is also likely to cause damage to the board.All EPROM upgrades have been prepared in an ESD-safe production environment and will be packaged in equally ESD-safe materials.Purchase with confidence!
Price: 27.95 CAD
Location: Mississauga, Ontario
End Time: 2025-01-20T10:34:39.000Z
Shipping Cost: 5.54 CAD
Product Images
Item Specifics
Returns Accepted: ReturnsNotAccepted
Model: D4
Type: Drum Module
EPROM Firmware Version: 1.04
Features: MIDI, Programmable
MPN: Does Not Apply
Brand: Alesis
