Re: Cheese Video Box

[noone@nowhere.net]

I am hoping someone can tell me if I missed something in the specs that 
would allow me to feed in the 3 separate analog RGB signals...

The Cheese Video Box card has a pre processor (SAA7111) that I think 
converts analog signals into digital but I'll be darned if I can 
understand the specifications of the chip.  I think it expects a mixed 
signal and then separates it, quantifies the analog signal into a binary 
value and feeds it in to the (AL250) vga out chip.  (Again, only if I 
understand the specs which I am not claiming.)

Michael J. Mahon wrote:
>The problem of getting RGB into the chip is that it must be digital. 
It requires the upper five bits of Red and Blue, and the upper six bits 
of Green.  Of course these must be clocked into the chip at the correct 
rate.  It would be a simple product, but a non-trivial hack, to make 
this modification, IMO.

Interesting, IRRC, the schematic of the IIgs SGR chip has digital 
signals...  (I don't have my borrowed book handy.)  Do you think it 
would be feasible to patch the Main board into the AL250 directly?

I'm willing to convert the Cheese Box into a slot card or even daughter 
board for power and other signal taps and 'easy' integration.  (Little 
solder, little hot glue...)

Thankx,
Ed
eeastman@apple2.com