is_whitespace: (key) => /\s/.test(String.fromCharCode(key)),
sys_stack: () => console.log(`[${simstack}]`),
sys_parsenum: (addr, u, base) => {
is_whitespace: (key) => /\s/.test(String.fromCharCode(key)),
sys_stack: () => console.log(`[${simstack}]`),
sys_parsenum: (addr, u, base) => {