Massbus simulation

[Guy Sotomayor]

Dave McGuire wrote:
> On Jun 20, 2007, at 3:48 AM, Sridhar Ayengar wrote:
>>>> >   Something tells me a MASSBUS-interfaced peripheral would be of
>>>> > somewhat limited appeal. ;)
>>>>
>>>> Every DEC10 owner I know would want one. Guy started on a design, but
>>>> I think he got tied up with other projects. Mike Ross bought bits of
>>>> a commercial unit, but I don't think he ever found the software.
>>>   Yes, all...what, fifteen of us?  Far fewer than something like 
>>> Brad's Unibus disk controller.
>>
>> The 11/[750,780,785,790,795] has Massbus too.
>
>   Well they *can*.  As can many PDP-11s.  So yes, I suppose you have a 
> point!
One thing that I've tried to maintain in the hardware design is 
flexibility.  There will be two boards.  Once board will contain all of 
the main logic (FPGA, uC, IDE interface, etc).  The daughter board will 
have the interface adapter (ie massbus trancievers).  By creating other 
daughter boards (I'm planning a Unibus one too) and loading different 
code into the FPGA and uC, it should be able to emulate almost any type 
of disk device (maybe tapes too...but that'll be later).

-- 

TTFN - Guy