| UMBC | CMSC 391 -- Programming Microcontrollers |
| symbol | address | Description | Returns | Uses | Changes |
|---|---|---|---|---|---|
| asc2hex | 0x0065 | convert character 0-9,A-F to number 0-15 | |||
| autobaud | 0x0042 | Initialize serial port | |||
| cin | 0x0032 | Get Acc from serial port | Acc = SBUF | Acc, SCON | Acc, SCON.RI |
| cin_filter | 0x0062 | like cin, but scan for arrow keys, pgup/pgdn | |||
| cout | 0x0030 | Send Acc to serial port | N/A | Acc, SBUF, SCON | SCON.TI |
| erall | 0x005C | erase the Flash ROM chip, C=1 if error | |||
| esc | 0x003E | Check for ESC key. Carry set if ESC has been pressed | |||
| find | 0x005F | find next prog header in memory | |||
| ghex | 0x003A | Get Hex input into Acc. Carry set if ESC has been pressed | |||
| ghex16 | 0x003C | Get Hex input into DPTR. Carry set if ESC has been pressed | |||
| lenstr | 0x004A | return the length of a string @DPTR (in R0) | |||
| newline | 0x0048 | print CR/LF (13 and 10) | |||
| pcstr | 0x0045 | print string in compressed format (no docs) | |||
| phex | 0x0034 | Print Hex value of Acc | |||
| phex1 | 0x002E | print a single hex digit | Acc | Acc | |
| phex16 | 0x0036 | Print Hex value of DPTR | |||
| pint16u | 0x0053 | print DPTR as an integer, 0 to 65535 | |||
| pint8 | 0x0050 | print Acc at an integer, -128 to 127 | |||
| pint8u | 0x004D | print Acc at an integer, 0 to 255 | |||
| prg | 0x0059 | write Acc @DPTR to Flash ROM, C=1 if error | |||
| pstr | 0x0038 | Print string pointed to by DPTR, must be terminated by 0 or a high bit set pressing ESC will stop the printing |
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| smart_wr | 0x0056 | write Acc @DPTR (RAM or flash), C=1 if error | |||
| upper | 0x0040 | Convert Acc to uppercase. Non-ASCII values are unchanged |