Accessing SR-52 additional registers

[Didier Lachieze]

(09-18-2022 10:44 PM)Matt Agajanian Wrote:  I presume you needed to send the 52 back to TI so they could install the ICs. Was it a substitution of ICs or were they installed in an open socket?

There is no open socket for that on the SR-52 however Texas Instruments was selling the TMC0599 Multi-Register chips to the public and some SR-52 users found the way to add them into the SR-52 to get more registers available.

This was published in 52-Notes V5N2p3:

Quote:Adding Chips (52): TI is now making available to the public the TMC 0599 chip via
Mr S Riggs, Box 53, Lubbock, TX 79408 for $17.77 each. Reportedly, 2 of these will
provide the missing SR-52 registers (20-59) if properly installed. Michael Rak (502)
has obtained details from a TI source, and if you are experienced at assembling
modern electronics components and are willing to risk machine damage, send 25¢
and a SASE to Mike at 1823 El Cerrito Pl #F Los Angeles, CA 90068 for a copy of his
info. Neither Mike, nor TI nor the SR-52 Users Club assumes any responsibility
whatsoever for any consequences which might arise from chip ad-on mods. TI does
not now, and does not plan to perform this mod for the general public.

You can see such modification done here. I have modified this way my SR-52A which has now 50 user memory registers instead of 20 with the addition of a single TMC0599.