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Ive completely rewired the lead . The j4 is connected 2-3 and replaced the 74 ic with a philips 74hcu type and still the same.
The rgb signal is it pal or ntsc ? Or does it not work like that.
I dont have the AD chip fitted.
My 62256 rams are 100 speed and not 55 would this make a difference.
I took out the zx rom and still have the same picture.
I'll list out all the ic's and makes.
- Sat Jul 01, 2017 11:01 am
- Forum: Hardware
- Topic: New ZX81 16K SRAM modules available soon from ZX ZIGG
- Replies: 8
- Views: 2233