Any Mac video architecture experts out there?

[Neil Gardner]

Are there any video hardware gurus out there? or alternatively someone with
a recent edition of either the 'Guide to the Macintosh Hardware' or
'Designing Cards and Drivers for the Macintosh Family'.

I need the video horizontal and vertical scan timings for the 21" display
(1152x870), and since my copy of the above manuals only covers up to the
IIfx, it only goes as far as the 16" display. I'm guessing that anything
which covers the Quadra range should include the timings for the 1552x870
display.

Any help much appreciated.

--Neil Gardner

ngar...@acorn.co.uk

[Dale Adams]

In article <2e6s33$5...@acorn.acorn.co.uk> ngar...@acorn.co.uk (Neil

Gardner) writes:
> I need the video horizontal and vertical scan timings for the 21" display
> (1152x870), and since my copy of the above manuals only covers up to the
> IIfx, it only goes as far as the 16" display. I'm guessing that anything
> which covers the Quadra range should include the timings for the 1552x870
> display.

The vertical scan rate is 75 Hz; the horizontal scan rate is 68.7 kHz.

- Dale Adams

[Henk den Bok]

here goes:

DTS Tech Note "HW 30 - Sense Lines" lists which monitors the 8*24 card
supports.
Here are the possibilities for monitors larger than 640x480:

Monitor: Resolution (HxV): Dot Clock: Horz. Sync. Vert. Sync.
Portrait (15") 640x870 57.2832 MHz 69.9kHz 75Hz
RGB 16" 832x624 57.2832 MHz 49.7kHz 75Hz

B&W, RGB 21" 1152x870 100 Mhz 68.7kHz 75Hz

The dot clock and sync information comes from a data sheet provided by
Nanao.

So, it's not by me, I just happened to be organized :)

Henk
--
Henk den Bok
Physics Laboratory email: den...@fys.ruu.nl
Utrecht University tel. : (+31)-(0)30-537556
P.O. Box 80.000 fax. : (+31)-(0)30-531601
3508 TA Utrecht, The Netherlands