RE: Ultimax questions

From: Bil Herd <*bherd_at_mercury-cg.com*> Date: Tue, 22 Oct 2013 13:43:35 -0400 Message-ID: <e0b47593ee8ab83530c6ce154c3c3d7f@mail.gmail.com> · bherd_at_mercury-cg.com

>Better than no move at all, especially with the bottleneck you had to go
>through in order to access the display RAM for the VDC.

It is better than nothing... but silly. :)

It crossed our minds to ask for a DMA type transfer so the VDC could go get
its own data but that wasn’t going to happen in the time we had.

>Have you seen some of the things people do with the VDC?

Yes there is some amazing stuff out there.  I think the more problems a chip
has the more beautiful things you can trick it into doing (reliability being
a different issue)

>I thought all VDCs in the C128 are able to work with 64K, you just have to
>replace the 41416 DRAMs with 41464?

  I actually don’t know for sure, just having heard people refer to the 64k
it sounded like there was more functionality (I was gone from CBM by then).
There were also differences in the C128D that they released vs. the one we
had ready for release in the beginning, and I don’t know what all of those
differences are except what people mention (video noise, etc)

Bil

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