INMC 80 News |
June/July/August 1980, Issue 1 |
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Page 15 of 48 |
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Many readers have requested a table showing equivalent codes for old monitors and for Nas-Sys. Many new INMC members have only ever used Nas-Sys, and have come across old programs they wish to convert. Derek Brough has made a tremendous effort in converting the T4 library to Nas-Sys, so you will find it easier to get some of these programs from the new Nas-Sys machine code program library.
To keep the table simple we have compared T4 to Nas-Sys. The older T2 and B-Bug monitors were subsets of T4, so the conversion works in the same way for them. It is not possible to show every detail because there are so many small differences, in particular the method of input and output.
| Name | Function performed | T4 | Nas-Sys | |
|---|---|---|---|---|
| RIN | Get input character | CD 3E 00 | CF | |
| ROUT | Output a character | CD 4A 0C | F7 | |
| or | F7 | |||
| or | CD 3B 01 | |||
| PRS | Print a string | EF ...00 | EF...00 | |
| RCAL | Relative call | D7 .. | D7 .. | |
| SCAL | Subroutine call | NONE | DF .. | |
| RDEL | Delay | FF | FF | |
| or | CD 35 00 | |||
| BRKPT | Breakpoint | E7 | E7 | |
| START | Reset computer | C7 | C7 | |
| MRET | Return to montior | C3 86 02 | DF 5B | |
| or | CF | |||
| TDEL | Long delay | NONE | DF 5D | |
| FFLP | Flip bits in port 0 | CA 4A 00 | DF SE | |
| MFLP | Flip tape drive LED | CD 51 00 | DF 5F | |
| ARGS | Load arguments | CD 97 06 | DF 60 | |
| IN | Scan for input character | CD 4D 0C | DF 62 | |
| or | CD 69 00 | |||
| INLIN | Obtain input line | NONE | DF 63 | |
| NUM | Convert from ASCII to binary | CD 5A 02 | DF 64 | |
| TBCD3 | Output HL in ASCII | CD 32 02 | DF 66 | |
| TBCD2 | Output A in ASCII | CD 2B 02 | DF 67 | |
| B2HEX | Output A in ASCII | CD 44 02 | DF 68 | |
| SPACE | Output space | CD 3C 02 | DF 69 | |
| CRLF | Output carriage return | CD 40 02 | DF 6A | |
| ERRM | Output error message | NONE | DF 6B | |
| TX1 | Output HL,DE in ASCII | CD 5B 04 | DF 6C | |
| SOUT | String of characters to serial output | CD CC 06 | DF 6D | |
| SRLX | Character to serial output | CD 5D 00 | DF 6F | |
| or | CD 5E 00 | |||
| RLIN | Get arguments from input line | NONE | DF 79 | |
| B1HEX | Output half of A in ASCII | CD 4D 02 | DF 7A | |
| BLINK | Blink cursor, get input | NONE | DF 7B | |
| CPOS | Find start of line | NONE | DF 7C |
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Page 15 of 48 |
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