🚀 go-pugleaf

In article <13839@cbmvax.commodore.com>, daveh@cbmvax.commodore.com (Dave Haynie) writes:
>
> I'm not sure what the GVP boot ROMs actually do, but with the A2620 and A2630,
> these ROMs are gone forever by the time you're into AmigaOS the first time
> after a full system reset (eg, powerup, keyboard, or any other condition that
> yanks both RST* and HLT*).

	No ROMs after boot? Not on my A2620!

    There a posting about entering the ROM monitor, which I proceeded to fool
around with.  Realizing that while in the monitor, the ROMs had to be in the
Amiga address space, I searched for them and found them at address F80000.

    Being curious, I had thoughts about how to access this ROM (after the
bootup sequence completed). You told me before during a phone discussion
we had (it was about running the 68020 and 68000 simultaneously) that the ROMs
were disabled after boot.

    At this point, fully believing the ROMs would go poof, I rebooted to snoop
around with the Manx db debugger. Just for the hell of it, I looked at the
same address, and lo, the ROMs were still in the Amiga's address space!

	What Im leading up to Dave, is I still believe you, and therefore would like
to know if I have a different A2620 than perhaps what is the production A2620.

	I bought the A2620 immediatly upon hearing of it release, and not long
after this, supply dried up for a while. This same store also sold me an
A2000 with the cherry keyboard. I must be buying this stuff too soon.

	Really curious now, I looked at what controlled the ROM access. On sheet
1 of the schematics in the A2620 manual, there is _CSROM (with an interesting
? by the label). On sheet 3, _CSROM appears to be generated by the PAL U304.

	I guess I must have a really old set of PALs. Perhaps preproduction?

	Am I making the correct assumptions here?

	Just for reference, what is the current PAL revision? I remember hearing
about a change for the GVP disk controller after the A2620 was initially
released, which I don't have (I have a A2091 now), so I was unconcerned 
about it at the time.

	Should I bother getting new PALs?

	Do newer PALs fix any other problems or known inconsistancies?

	I kind of like, and don't mind the ROMs being there. That is unless it
may become a problem in the future.

	As always, thank you very much for your time and infinite patience.
    
> Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
>    {uunet|pyramid|rutgers}!cbmvax!daveh      PLINK: hazy     BIX: hazy
>       Get that coffee outta my face, put a Margarita in its place!

-- 
Harald Milne                   RISCy business	       uunet!ccicpg!boink!harald