Good memory board for Heath H-11?

Rich Cini rich.cini at
Tue Feb 9 21:18:09 CST 2016

Thanks guys. This is really helpful. I was getting confused between the M8044 and M7944 boards. Max memory for the LSI-11 is 32kw, right? 

Rich Cini

Sent from my iPad

> On Feb 9, 2016, at 9:47 PM, COURYHOUSE at wrote:
> I have not opened up ours yet but I always assumed  they were all DEC  
> boards.
> Ed# _www.smecc.org_ ( 
> In a message dated 2/9/2016 7:36:05 P.M. US Mountain Standard Time,  
> glen.slick at writes:
> On Tue,  Feb 9, 2016 at 6:08 PM, Richard Cini <rich.cini at>  
> wrote:
>> All —
>> I picked-up a Heath H-11 machine the  other day and it has a single 4kw
> memory board. From my prior experiences with  DEC (an 11/34a many years ago; 
> now at the RI Computer Museum), I know my way  around the field guide…but I’
> m having trouble trying to identify the correct  module number suitable for 
> the LSI-11 CPU. Even though it’s a Heath machine, I  assume it’s module 
> compatible with DEC. Any help would be appreciated.  Thanks!
>> Rich
> Maybe an M8044 MSV11-D (no parity) or  M8045 MSV11-E (parity) would be
> most appropriate. They came in 4KW, 8KW,  16KW, and 32KW  flavors.
> Fairly  common on eBay.

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