Z80

Assembler

Caveats

• when pushing `1' by using SCF and RRA, the carry-flag will be reset by RRA
• don't forget the brackets, i.e (HL) instead of HL, and LD DE,(NN) instead of LD DE,NN
• when communicating with the MSX Video Display Processor (VDP) like this:

IN L,(C)
IN H,(C)

the addresspointer of the VCP might not be increased when reaching the IN H,(C). Solution:

IN L,(C)
NOP
NOP
IN H,(C)

• with CP A the result will *always* be zero. Test for zero with CP 0 or AND A