Vintage Simmons Drums (UK) Users Group

Prices of new eproms are rediculously high. Snatching them from old 
computers etc are highly recommended. I know for a fact that there are 
different voltages used etc. Not sure which is what 'cause the ones I've 
tried in mine are working fine.

*checking*

The ones I have which I know work and are used are NEC D27128D, ST 
M27256-2FI (damn, big one!) etc but I cannot read the brand of my original 
Simmons ones. The type number is HN4827128G-25 and HN482764G.

Don't know if I made anything easier there... should probably have shut up! 
;)

electronically yours, jesper
- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se

Order your own copy of the Machinepop/Imiafan
split-EP at www.electronic-obsession.se/label.asp

"Folk med riktiga skivsamlingar har riktiga spelare" (Daniel Araya)

----- Original Message ----- 
From: "tdecker1271" <tom@...>
To: <Simmons_Drums@yahoogroups.com>
Sent: Saturday, January 13, 2007 5:26 PM
Subject: [Simmons Drums] Question about SDS EPB + Chips


> Ok, so I finally got my hands on a working SDS EPB, and a bunch of
> blank 27128 EPROMS. I've verified that they are all zeroed with an
> EPROM reader. Here's the problem:
>
> When I put some of them in, the input clip light stays lit while the
> unit is in PROM play. This seems to happen with the AMD D27128-A and
> some INTEL D27128-A, but not all. As a matter of fact, I have one AMD
> D27128-A that did NOT clip, but when saving PROM, it got HOT HOT HOT!!
>
> The INTEL D27128-4 seem to work great.
>
> The MITSUBISHI M5L27128K work like a charm.
>
> Looking at my SIMMONS branded chips, they mostly seem to be the
> MITSUBISHI chips, except a couple are INTEL.
>
> Here's where I ask the question: Does anyone know of a good dealer /
> seller in the US that might have the D27128-4 or the M5L27128K for a
> reasonable price, that would sell to a private entity such as myself?
> I don't mind paying a minimum of $100 or whatever, as long as it isnt
> too high. I'm not made of money, yaknow. I've looked online at a few
> places, and they don't seem to specify chip type other than 27128
> (which is too vague). I know these chips are out of production.
>
> Thomas
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> Yahoo! Groups Links
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