Intel SDK-51 8051 development system monitor

E000  POWERON      Reset entry
E003  BREAK        Entry for INT0
E006  CO           Console output    R2=character to display
E009  CI           Console input     A=keypress, waits for keypress
E00C  CSTS         Console status    CY set if input pending, CY clear otherwise
E00F  NEWLINE                        CR,LF to console output
E012  TIME         Time delay        (R3+256*R2 * 100us)  = delay time
E015  LSTBYT       Display hex byte  R2=byte to display
E018  LSTWRD       Display hex word  R3+256*R2=16-bit word to display
E01B  ASCII_TO_HEX Hex char to bin   In: R2=character, Out: A=$00-$0F or undefined
E01E  PRINT_STRING                   R3+256*R2=>len,string
E021  reserved
E024  reserved
E027  reserved
E02A  reserved
E02D  reserved

E030  COPYRIGHT    Copyright string  " (C) yyyy name...."
E046  DATECODE     DB BCD(day),BCD(month),BCD(year-1900) eg $08,$12,$81
E049  CHECKSUM     DB 0

E04A  FETCH
E04D  STORE
E050  GETNUM
E053  GETEOL
E056  GETOKE
E059  DISPLAY_TOKEN
E05C  SAVE_AND_DISPLAY
E05F  ERROR
E062  WAIT_FOR_USER
E065  GET_PART
E068  CONTINUATION_LINE
E06B  GET_COMMA
E06E  EOL_CHECK



Monitor memory use:

xx08 stack
xx24 line buffer
xx3C string buffer
xx40 workspace, 3 bytes
xx43 variables
...
xx5A variables
xx5B more variables
...
xx65 more variables



0003 must be LJMP E003 as system uses INT0
0013 optionally used for keyboard INTR key