Basic Routines
We’ve had several goes at persuading various people to tear the Nascom 8K
BASIC apart, because it must be just ‘chock full’ of useful routines. Up to date, we
haven’t had much success, either those we approached were too busy, or something. So
were we surprised when we were sent the following by one of those ‘precocious brats’
who has taken the BASIC to pieces in odd moments whilst studying for his ‘0-levels’.
Makes yer sick don’t it?
Anyway, young Steve hasn’t told the whole story, he hasn’t filled in the
details of what the registers have to contain when the routines are called. He’s
promised that as part 2 for the next issue. So for those of you who wish to figure out
the remainder of what could be a very powerful machine code floating point maths
package, here are the calls.
Bits of BASIC . . .Routines and all that.
by Steve Hansellman
Nascom BASIC contains a number of useful routines (if you know where to find
them). So feeling masochistic, I decided to find the more useful ones.
| Function | Address |
| SGN | F822 |
| ABS | F838 |
| FRE | F0D0 |
| POS | F0FE |
| RND | FB8B |
| EXP | FAFA |
| SIN | FC06 |
| ATN | FC7C |
| DEEK | FDBC |
| LEN( | F382 |
| VAL | F41C |
| CHR$ | F3A2 |
| RIGHT$ | F3E2 |
| NEW | E4B9 |
| FOR | E779 |
| STOP | E870 |
| CONT | E89E |
| CLEAR | ESCA |
| GOSUB | EA1C |
| RETURN | EA4B |
| REM | EA72 |
| ON | EAE1 |
| PRINT | EB23 |
| READ | EC2C |
| DIM | EF28 |
| WAIT | F453 |
| CLOAD | F4F9 |
| CLS | FD8B |
| LINES | FDAD |
| SCREEN | FDE6 |
| Function | Address |
| INT | F8E6 |
| USR | 1003 |
| INP | F441 |
| SQR | FAAC |
| LOG | F6C7 |
| COS | FC00 |
| TAN | FC67 |
| PEEK | F5A3 |
| POINT | 1051 |
| STR$ | F19A |
| ASC | F391 |
| LEFT$ | F3B2 |
| MIDS | F3EC |
| LIST | E6DD |
| RESTORE | E846 |
| END | E872 |
| NULL | E8B1 |
| RUN | EA10 |
| GOTO | EA2D |
| DATA | EA70 |
| LET | EA87 |
| IF | EAFF |
| INPUT | EBFD |
| NEXT | ECF6 |
| OUT | F450 |
| CSAVE | F4C3 |
| POKE | F5AA |
| WIDTH | FDAS |
| DOKE | FDC7 |
| Other useful routines: |
| Print character in A | –– | E698 |
| Input a line | –– | E607 |
| Output ‘?’ then get line | –– | E4FC |