For more information, check the following Web pages:

http://retrotechnology.com/restore/440_kyle.html
http://retrotechnology.com/restore/int_440.html

This document by Kyle Owen, describes the terminal operation of the monitor ROM for
the  Intel MCS Intellec 4/40 development system. These instructions were interpreted by
Kyle, from operation of his Intel 4/40 system, and by reading similar monitor instructions 
from the Intel MDS 8 mod 80 development system manual. He worked on this during July and 
August of 2013, with some assistance from Herb Johnson who provided replacement ROM code
for ROM 0 which was damaged on Kyle's 4/40 system. - Herb Johnson, Aug 27 2013

Upon powering up the Intellec, depress the MON switch, and reset the system. If the system
 is not halted, the front panel lights should blink, and if connected to a teletype, a 
carriage return, line feed and period should be printed. This indicates that the monitor
 is currently running and is awaiting a command.

Valid characters:
0123456789ABCDEFIJKLMNPRSTW,

Available commands:
B
Usage: BX,Y
Prints BPNF format dump from hexadecimal address X to Y.
Example:
.B0,3
BPPPPPPPPF BPPPNPPPNF BPNPNPNPNF BNNNNPPPPF

D
Usage: DX,Y
Prints ASCII (human-readable) format dump from hexadecimal address X to Y.
Example:
.D0,3
000 FF EE DD CC

E
Usage: E
Prints an Intel HEX end-of-file marker (:00), LF, CR and a trailer of nulls.
XXX: Check order of LF, CR and trailer
Example:
.E
:00
[LF CR NULL...]

I
Usage: IX,Y
XXX: I have no clue (yet)

J
Usage: J
XXX: I have no clue (yet)

K
Usage: K
XXX: I have no clue (yet)

L
Usage: LX,Y
Loads BPNF format from teletype starting at address X to Y. Requires reader-run control
 relay if used with paper tape reader.
Example:
.L0,3
BPPPPPPPPF BPPPNPPPNF BPNPNPNPNF BNNNNPPPPF [this line is input by the user]

M
Usage: MX,Y,Z
XXX: Still investigating. May be a memory fill function.

N
Usage: N
Prints a series of nulls used for leader or trailer for paper tape punches.
Example:
.N
[NULL...]

P
Usage: PX,Y,Z
XXX: Still investigating. May be a memory search function.

R
Usage: R
XXX: Still investigating. May be a read Intel HEX format command.

S
Usage: SX
Show and edit memory location X.
Example:
.S3
DF-CC [monitor prints value DF and dash; user enters new value "CC"]
.S3
CC- [monitor prints value CC and dash; user escapes to dot prompt with carriage return]

T
Usage: T
XXX: Still investigating. Seems to erase all RAM contents. 

W
Usage: WX,Y
Prints Intel HEX format dump from hexadecimal address X to Y.
Example:
.W0,F

:100000000000000000000000000000000F0