TR-909 Firmware

i have an TR-909 with Firmware Version v.1 and tried to upadte the firmware byself.

In my labor i have the TL866 Pro 2 programmer and the 2764 er series Eproms on stock.

It was hard to find the hex or bin image file.

so i converted it byself:

you can download here the Firmware:

TR-909 v4 Firmware for the origional eprom type (2764)  (64K)

TR909-V4_for64k_eprom.hex

here´s the EPR FILE (same content and can be used in the Tool Prony Prog)

TR909-V4.EPR

and for the 27256 (256K) eprom which is different

TR909-V4-for-27C256-4000-to-5FFF.hex

here´s the EPR FILE (same content and can be used in the Tool Prony Prog)

TR909-V4-for-27C256-4000-to-5FFF.EPR