So you get a display that shows you the current contents of A and another register of your choosing.

Once you put the CPU into debug mode, you choose a register to watch (b-f) or 0 (will show you the zero and carry flags in the digits displayed). The debugger leaves something to be desired. It does look very much like machine language programming, and essentially it is. Interestingly, you can move from memory to the A register with register indirection (read from memory), but you can't store to memory.įor some reason, they call registers 'mem' in the manual, which seems a bit confusing, as I would normally interpret mem to mean memory. MOV read from memory (indirection by register) MOV reg,#n8 (the n8 means an 8 bit number), reg is A-F The addressing modes are pretty simple too: HEX makes a data table entry of a single byteīON/BOFF BON sets up a buzzer at a specific frequency on output pin 8, BOFF turns it off, used with TM1/TM2 to make a specific duration

TM1/TM2 TM1=delay by param*10ms TM2=delay by param*1sec There's 32 keys in the keyboard, arranged in 2 groups of 16 keys (4 keys by 4 keys). So you get to enter instructions from line 00 to line 3F. There's a limit of 64 instructions (or lines) in a program. It has 6 registers, A through F, each a single byte. It looks like a 'simplified' processor that runs an interpreted machine language.

P touch editor manual