Is that even possible? Connecting a laptop monitor and keyboard to an A1200?
Extremely difficult. I don't think it's been done before. You'd probably need to scandouble and then rewire the 1200's video output to a small nonstandard ribbon cable and do the same for the keyboard - which will probably require a custom interface chip as all PC keyboard adaptors do. Plus the 1200 motherboard won't fit in almost all laptop cases.
So in summary, I don't think it's worth attempting unless you're an electronics supergenius.:crazy: