16 Nov
2007
16 Nov
'07
5:02 a.m.
Alexis wrote:
There's a line of chip from Analog Devices,
AD273/AD274/AD275 and others,
which will convert from RGB to NTSC/PAL. It gives composite and split video
outputs. They're in the US$5 range. Perhaps this could be used with my
previous circuit that converts TTL to analogue?
Possibly, but I'm still not sure that it would handle the intensity bit
of CGA (RGBI).
I have ordered an Extron which should convert TTL to analog and also
split it out to R/G/B/H (vertical sync on green). From there I hope to
connect it to a scan converter that claims to go down to 15Khz horizontal.
I'm still not crossing my fingers for all 16 colors though.
--
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
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