# test3d
Low-tech computing for Minetest
## T400 instructions
TOS = top of stack

| ins	 | function			|    mnemonic	|
|--------|------------------------------|---------------|
|4095	 | duplicate TOS		| dup		|
|4094	 | swap TOS			| swp		|
|4093	 | read memory from TOS		| read		|
|4092	 | write to memory from TOS	| write		|
|4091	 | add TOS			| add		|
|4090	 | suptract TOS			| sub		|
|4089	 | jump to TOS			| jmp		|
|4088	 | skip if TOS = zero		| sez		|