A Common Apple 1 Emulation Bug
Recently I was bringing up an Apple 1 and I did the first thing I always do to do an initial checkout, which is run the Test Program from the Apple-1 Operation Manual. This is a very simple program that runs a loop that counts from 0x00 to 0xFF and prints each byte as an ASCII character. Here is the program: 0000 LDA #0 0002 TAX 0003 JSR ECHO 0006 INX 0007 TXA 0008 JMP $0002 »