FPGA VAX update
Peter C. Wallace
pcw at mesanet.com
Mon Oct 24 13:03:57 CDT 2005
On Mon, 24 Oct 2005, Chuck Guzis wrote:
> On 10/23/2005 at 9:07 PM John Allain wrote:
>> My simple answer...
>> On a 200Mhz Pentium, SimH running VMS feels like a MicroVAX II
>> (close to a 750). At 700Mhz, it feels like a MicroVax 3500. Basically
>> a directly proportional increase.
> Okay, then how fast would one suppose that a Transmeta VLIW implementation
> would run (replace the "X86 Code Morphing" ROM with your own version of a
> "VAX emulation" ROM)? Would it most likely run faster than an FPGA
> implmentation? If so, why bother with the FPGA? Given that there was no
> single VAX implemenation by DEC, how could this even offend the purists?
> It would let one use a commodity product (I believe you can buy TM
> motherboards) and more significantly, allow one to easily repair problems
> in compatibility.
Transmeta is gone....
> ...just trying to suss out the advantages of using an FPGA version of a
> relatively complex machine...
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