Z80 Code Golf

Problems

See anarchy golf.

Execution in emulator

All registers and memory are cleared by 0.
Program is loaded from 0000H, and run from it.
Execute `HALT' when you want to terminate program.

System Call

Address	Name	Function	In	Out
8000H	#PUTCHAR	Output character to stdout	A: ASCII code	none
8003H	#GETCHAR	Input character from stdin	none	A: ASCII code, Carry Flag: EOF

Memory mapping

0000H-7FFFH	Free area
8000H-	System area
-0FFFFH	Stack area

I/O port, Interrupt

No use.

Test