Hi Joshua, Be sure to count bytes! Address $0010 is not too far from the end of the code block. Adding a few debug statements could cause it to grow into the scratch location. Best regards, Gaston

#architecture

Thanks!

#architecture

How much detail do you need? Keep in mind that the 1802 ALU is a single bit wide and it takes 8 clock cycles (overlapped with the next instruction fetch) to add two values together.

#simulator #registers #architecture