[Info-vax] VMS port to x86

[JKB]

Le Fri, 25 May 2012 03:50:41 -0700 (PDT),
Neil Rieck <n.rieck at sympatico.ca> écrivait :
> Over the years we've watched companies like AMD reverse engineer the
> x86 instruction set to produce a functionally similar x86 chip.
> Likewise, companies like Compaq reverse engineered the PC (and BIOS)
> to produce a functionally similar computer. In the past, big companies
> charged big bucks for C compilers yet today every C programming course
> instructs people to only use open-source compilers like GNU-C.
>
> So why do people here always throw out BLISS as the reason why porting
> VMS to x86 is not possible? After all, its only software. Software
> patents have always been dubious but if there is a copyright on BLISS
> then why not just reverse engineer it in C?

	In FreeVMS, we have a Bliss compiler that runs with gcc. Today,
	FreeVMS 0.4.0 waits for new developers to write memory management
	subsystem. 0.4.0 is rewritten from scratch to use a microkernel and
	to be portable.

	Rewrite from scratch a VMS like operating system is not a huge work.
	Problems come with drivers.

	JKB

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