Re: ROM 01 vs ROM 3

[vandry@CAM.ORG (Phillip Vandry)]

Clayten_Hamacher@mindlink.bc.ca (Clayten Hamacher) writes:

>Recently someone posted something about all the plusses of ROM 3, does it
>have any drawbacks... Not counting the fact that some badly written software
>is too ROM dependant to run on it, I'm talking about the ROM and motherboard
>itself.

Well, I do know ColorTerm doesn't work on ROM 3. The author doesn't know why -
it's not ROM dependant.

>P.S. It has a newer set of tools but considering system 6 has even newer
>tools wouldn't cause those to be loaded in, thus losing the 7% speed
>advantage you gained by having them in ROM?

Many of the tools are the same as in System 5, so those are still in ROM.

>Also, can you tell me why programs in rom run faster than programs in ram??

The speed of the 65816 is 2.8 MHz. Because of RAM refresh cycles, the effective
speed is reduced to 2.5 MHz, but ROM has none of that, so it runs at the full
2.8 MHz.

>And yet another... One version of the ROM 3 had memory peeker etc locked in..
>I would prefer this because they are in ROM and therefore not taking up any
>RAM (aside from whatever they might use when executed)..

ROM1s have those CDAs, and I don't see why they're not available on boot. I
mean, they're there, so why lock them out of the menu?

>Or do CDAs in ROM get transfered into RAM to run?

I doubt that they do, though it's possible. If I was writing a ROM CDA I'd make
the extra effort so that it can run in ROM..

>Clayten_Hamacher@Mindlink.bc.ca                 Land of the rising snow.
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| Phillip Vandry | Vandry@Cam.Org | II the future! | II 1993!          |
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