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Re: Crosspost: Did the cpu influence the display?

Subject: Re: Crosspost: Did the cpu influence the display?
From: "JFfromChile" <jfroco@gmail.com>
Date: 28 Dec 2005 11:32:36 -0800
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Bill H wrote:

>
> So the question is, did the cpu influence the display?
>

No. The cost of the RAM was by far more important. There are two
classic cases:

Atari 2600: defeated its competition because it didn't need a lot of
ram to display colour graphics (but programming was complicated).

ZX Spectrum: they reduced the number of colours (2 colors per 8x8 bits
block) in order to require less RAM for displaying the screen at the
same resolution

Evenmore, taking the ZX Spectrum example: it uses a memory-mapped
display, so if you replace the Z80 CPU with a 6500 CPU and write the
same values to the same positions you got the same display no matter
what CPU you use, so, No, the cpu didn't influence the display.

Regards

JF

References:
- Crosspost: Did the cpu influence the display?
  - From: "Bill H" <bill@ts1000.us>

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