Re: CBM900 to SVGA monitor

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Sat, 26 Jul 2014 18:42:05 +0200 Message-ID: <53D3DA5D.7020700@laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 07/25/2014 09:03 AM, Michał Pleban wrote:
> Hello!
>
> smf wrote:
>
>> http://www.floodgap.com/retrobits/ckb/secret/900.html
>> "Graphics and Sound Two versions, according to Peter Kittel; the
>> graphics version was 1024x800 monochrome (72Hz refresh on the monitor)
>> and intended as a workstation; the server variant was character display
>> only. Graphics powered by the 8563 VDC."
>
> As we can see, this is wrong: workstation is not powered by the VDC, and
> the refresh rate is 60 Hz not 72 Hz :-)

Also, what is the maximum refresh rate and resolution the VDC can 
produce? The clock is 16 MHz and you have 64 KB display RAM max (as far 
as I know).

That doesn't really let you do much. At least not 640 x 400 in 60 Hz, 
unless you go interlaced.

  Gerrit

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