RX02 rx-01 heathkit 8 inch drive for H-11 ( lsi11 heath case drive diff?)

COURYHOUSE at aol.com COURYHOUSE at aol.com
Wed Aug 3 11:19:52 CDT 2016

Rich -   correct. That is the  disc  we have  here.
Just  wondering in case  We ever  got a pdp-8 with   disc  interface or a 
standard  unibus  PDP 11 here at  SMECC  .   We  have an  11/20 but of  
course not much memory  and no  disc  controller  so it  sits.
Ed#  _www.smecc.org_ (http://www.smecc.org)  
In a message dated 8/3/2016 3:51:20 A.M. US Mountain Standard Time,  
rich.cini at verizon.net writes:

Are you  referring to having the H-27 drive from Heath? I don't know for 
sure because  I've never seen H27 docs, but the disk capacity is the same as 
the RX01 (256k)  and I think the interface was made deliberately 
incompatible, likely at the  behest of DEC. The version of RT-11 (called HT-11) 
supposedly used a different  floppy device driver. 

Again, this is based solely on what I've read  from various places and not 
direct experience (I have an H-11 with a SCSI  controller; no floppy; and it 
runs RT-11 no problem). 


Sent  from my iPhone

> On Aug 3, 2016, at 1:40 AM, COURYHOUSE at aol.com  wrote:
> we have a heath  h11  which is lsi  11   aka pdp  11/03
> the  drives  are  not  rx o1 or  rx o2... but are they  and the 
> comparable? with rx01  or  an rx02?
>  Thanks  Ed# at   smecc  

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