Or it could be a CD4016 which is the same. (Same pin layout)
I found a Lambda colour interface and I'm trying to use it with a ZX81 modified for video composite output.
I connected the video interface input to the zx81 output, then I connected a cable on the interface video output (not analog TV).
When I power on the computer the screen is blue instead of usual white.
W/o powering off the ZX81 I use its direct video output and display appears as usually, and keyboard is working.
I tried to initialize the interface as said in manual (poke 12301,1 then initialize to 7 (black) memory from 8192 to 10240, then RUN, ZX81 seems to hangup...), and still nothing when back on interface output.
Is there a physical modification to do inside the interface itself?
Something wrong in init process?
The ZX81 has an internal 32KB memory.
Thanks in advance for any help.
The Lambda Colour Pack has 1k RAM, but it occupies area 8k - 12k. Area from 12k - 16k is occupied to enable/disable the interface.
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube