19 Mar
2018
19 Mar
'18
12:45 p.m.
m?ndag 19 mars 2018 skrev Al Kossow via cctalk <cctalk at classiccmp.org>:
On 3/19/18 8:57 AM, Lyle Bickley via cctalk wrote:
Interesting. A framebuffer. But why four DACs? The framebuffer itself is
the 72 16kbit DRAM chips. Slightly more than one megabit. Not much being a
color framebuffer. I wonder what the colordepth and resolution was on this
one. 256 x 192 and 8 bits per colour perhaps?
Anything else known about it except for what Lyle dug out?
> 2914 chips. One board has some kind of
dedicated memory one board has
> 4 TRW chips which I think are AD converters.
>
It's a frame buffer, you can see the 10422 lookup tables behind the TRW
video DACs