Accessing SR-52 additional registers

[Matt Agajanian]

Hi all.

Just that. Were they directly accessible or did they need indirect addressing to be used?

Thanks

[Didier Lachieze]

Registers 20 to 59 are directly accessible once you have installed the related memory ICs inside the SR-52.

[Matt Agajanian]

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?

[Gene]

TI would not install additional chips of any kind. No manufacturer would do that at the time and probably not today.

A google search would turn this up Matt:

http://www.datamath.org/Sci/WEDGE/sr-52_...ented.html

Will help if you are able to do that type of thing in advance and post the results here. :-)

[Matt Agajanian]

(09-19-2022 12:59 AM)Gene Wrote:  TI would not install additional chips of any kind. No manufacturer would do that at the time and probably not today.

A google search would turn this up Matt:

http://www.datamath.org/Sci/WEDGE/sr-52_...ented.html

Will help if you are able to do that type of thing in advance and post the results here. :-)

In any case, thanks for finding the info.

[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.

[rprosperi]

Thanks for these notes and the link Didier, I never knew about this option to expand the SR-52 memory, pretty interesting!

[Matt Agajanian]

(09-19-2022 12:18 PM)rprosperi Wrote:  Thanks for these notes and the link Didier, I never knew about this option to expand the SR-52 memory, pretty interesting!

Agreed! Interesting and fascinating. Congratulations on your 52A. Enjoy.

[Gene]

Matt, don't get me wrong.

I'm simply suggesting that you google first and post what you find here. Try it and be a provider of information rather than asking questions only. :-)

Gene

[Matt Agajanian]

(09-19-2022 11:47 PM)Gene Wrote:  Matt, don't get me wrong.

I'm simply suggesting that you google first and post what you find here. Try it and be a provider of information rather than asking questions only. :-)

Gene

Okay.