[Info-vax] VSI OpenVMS Hobbyist Program Announced.

[Dave Froble]

On 6/17/2019 2:37 AM, Hans Bachner wrote:
> Craig A. Berry schrieb am 17.06.2019 um 01:05:
>> [...]
>>
>> It also may be that the libraries that emulate the byte-oriented
>> instructions in software have not been removed from V8.4-2L2 and work
>> just as well on an emulator as any other "native" instruction.
>
> If I understood VSI correctly the point of the -2L2 build was to use
> compiler switches to produce EV6-code only.
>
> As the -2L2 binaries media don't boot on real pre-EV6 hardware nor on a
> CHARON-AXP system configured as a EV4 / EV45 system (the system just
> hangs after "jumping to bootstrap code", consistent with what VSI
> claimed when the -2L2 build was announced), I still suspect that
> FreeAvanti does not tell you the whole truth when you ask it for CPU
> capabilities.
>
> Hans.

Having multiple versions of any product, when there is no need, is not a 
good thing.  So, for an emulator, you build it all into one product, and 
allow the product to "report" whatever the user wishes.  At least that's 
what I would do.

An emulator for just EV4 CPUs serves no purpose, and an emulator for EV6 
CPUs should still run the subset of an EV4.

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
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