# Apple II's system monitor The monitor allows peeking and poking memory in a manner that is much more convenient than with BASIC, in hexadecimal notation. A complete reference is in "Apple IIe Reference Manual". This is a quick reference. When inside BASIC, we enter the monitor with "CALL -151". We then get a "*" prompt. Typing an address reads that byte: *1DFC 1DFC- 2A * We can fetch a range: *1DFC.1E00 1DFC- 2A 2B 2C 2D 1E00- 2E * We can set memory: *1DFC:01 02 03 *1DFC.1E00 1DFC- 01 02 03 2D 1E00- 2E * We can "continue" setting memory, omitting address: *1DFC:04 05 06 *:07 08 *1DFC.1E00 1DFC- 04 05 06 07 1E00- 08 * You can disassemble memory with "L" (for LIST): *1DFCL (20 lines of disassembled memory)