Data |
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Used by the routine at STMT_LOOP.
i. The offset table.
There is an offset value for each of the fifty BASIC commands.
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SYNTAX | 1A48 | DEFB $B1 | P_DEF_FN | |
1A49 | DEFB $CB | P_CAT | ||
1A4A | DEFB $BC | P_FORMAT | ||
1A4B | DEFB $BF | P_MOVE | ||
1A4C | DEFB $C4 | P_ERASE | ||
1A4D | DEFB $AF | P_OPEN | ||
1A4E | DEFB $B4 | P_CLOSE | ||
1A4F | DEFB $93 | P_MERGE | ||
1A50 | DEFB $91 | P_VERIFY | ||
1A51 | DEFB $92 | P_BEEP | ||
1A52 | DEFB $95 | P_CIRCLE | ||
1A53 | DEFB $98 | P_INK | ||
1A54 | DEFB $98 | P_PAPER | ||
1A55 | DEFB $98 | P_FLASH | ||
1A56 | DEFB $98 | P_BRIGHT | ||
1A57 | DEFB $98 | P_INVERSE | ||
1A58 | DEFB $98 | P_OVER | ||
1A59 | DEFB $98 | P_OUT | ||
1A5A | DEFB $7F | P_LPRINT | ||
1A5B | DEFB $81 | P_LLIST | ||
1A5C | DEFB $2E | P_STOP | ||
1A5D | DEFB $6C | P_READ | ||
1A5E | DEFB $6E | P_DATA | ||
1A5F | DEFB $70 | P_RESTORE | ||
1A60 | DEFB $48 | P_NEW | ||
1A61 | DEFB $94 | P_BORDER | ||
1A62 | DEFB $56 | P_CONT | ||
1A63 | DEFB $3F | P_DIM | ||
1A64 | DEFB $41 | P_REM | ||
1A65 | DEFB $2B | P_FOR | ||
1A66 | DEFB $17 | P_GO_TO | ||
1A67 | DEFB $1F | P_GO_SUB | ||
1A68 | DEFB $37 | P_INPUT | ||
1A69 | DEFB $77 | P_LOAD | ||
1A6A | DEFB $44 | P_LIST | ||
1A6B | DEFB $0F | P_LET | ||
1A6C | DEFB $59 | P_PAUSE | ||
1A6D | DEFB $2B | P_NEXT | ||
1A6E | DEFB $43 | P_POKE | ||
1A6F | DEFB $2D | P_PRINT | ||
1A70 | DEFB $51 | P_PLOT | ||
1A71 | DEFB $3A | P_RUN | ||
1A72 | DEFB $6D | P_SAVE | ||
1A73 | DEFB $42 | P_RANDOM | ||
1A74 | DEFB $0D | P_IF | ||
1A75 | DEFB $49 | P_CLS | ||
1A76 | DEFB $5C | P_DRAW | ||
1A77 | DEFB $44 | P_CLEAR | ||
1A78 | DEFB $15 | P_RETURN | ||
1A79 | DEFB $5D | P_COPY | ||
ii. The parameter table.
For each of the fifty BASIC commands there are up to eight entries in the parameter table. These entries comprise command class details, required separators and, where appropriate, command routine addresses.
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P_LET | 1A7A | DEFB $01 | CLASS_01 | |
1A7B | DEFB "=" | |||
1A7C | DEFB $02 | CLASS_02 | ||
P_GO_TO | 1A7D | DEFB $06 | CLASS_06 | |
1A7E | DEFB $00 | CLASS_00 | ||
1A7F | DEFW GO_TO | |||
P_IF | 1A81 | DEFB $06 | CLASS_06 | |
1A82 | DEFB $CB | THEN | ||
1A83 | DEFB $05 | CLASS_05 | ||
1A84 | DEFW IF_CMD | |||
P_GO_SUB | 1A86 | DEFB $06 | CLASS_06 | |
1A87 | DEFB $00 | CLASS_00 | ||
1A88 | DEFW GO_SUB | |||
P_STOP | 1A8A | DEFB $00 | CLASS_00 | |
1A8B | DEFW STOP | |||
P_RETURN | 1A8D | DEFB $00 | CLASS_00 | |
1A8E | DEFW RETURN | |||
P_FOR | 1A90 | DEFB $04 | CLASS_04 | |
1A91 | DEFB "=" | |||
1A92 | DEFB $06 | CLASS_06 | ||
1A93 | DEFB $CC | TO | ||
1A94 | DEFB $06 | CLASS_06 | ||
1A95 | DEFB $05 | CLASS_05 | ||
1A96 | DEFW FOR | |||
P_NEXT | 1A98 | DEFB $04 | CLASS_04 | |
1A99 | DEFB $00 | CLASS_00 | ||
1A9A | DEFW NEXT | |||
P_PRINT | 1A9C | DEFB $05 | CLASS_05 | |
1A9D | DEFW PRINT | |||
P_INPUT | 1A9F | DEFB $05 | CLASS_05 | |
1AA0 | DEFW INPUT | |||
P_DIM | 1AA2 | DEFB $05 | CLASS_05 | |
1AA3 | DEFW DIM | |||
P_REM | 1AA5 | DEFB $05 | CLASS_05 | |
1AA6 | DEFW REM | |||
P_NEW | 1AA8 | DEFB $00 | CLASS_00 | |
1AA9 | DEFW NEW | |||
P_RUN | 1AAB | DEFB $03 | CLASS_03 | |
1AAC | DEFW RUN | |||
P_LIST | 1AAE | DEFB $05 | CLASS_05 | |
1AAF | DEFW LIST | |||
P_POKE | 1AB1 | DEFB $08 | CLASS_08 | |
1AB2 | DEFB $00 | CLASS_00 | ||
1AB3 | DEFW POKE | |||
P_RANDOM | 1AB5 | DEFB $03 | CLASS_03 | |
1AB6 | DEFW RANDOMIZE | |||
P_CONT | 1AB8 | DEFB $00 | CLASS_00 | |
1AB9 | DEFW CONTINUE | |||
P_CLEAR | 1ABB | DEFB $03 | CLASS_03 | |
1ABC | DEFW CLEAR | |||
P_CLS | 1ABE | DEFB $00 | CLASS_00 | |
1ABF | DEFW CLS | |||
P_PLOT | 1AC1 | DEFB $09 | CLASS_09 | |
1AC2 | DEFB $00 | CLASS_00 | ||
1AC3 | DEFW PLOT | |||
P_PAUSE | 1AC5 | DEFB $06 | CLASS_06 | |
1AC6 | DEFB $00 | CLASS_00 | ||
1AC7 | DEFW PAUSE | |||
P_READ | 1AC9 | DEFB $05 | CLASS_05 | |
1ACA | DEFW READ | |||
P_DATA | 1ACC | DEFB $05 | CLASS_05 | |
1ACD | DEFW DATA | |||
P_RESTORE | 1ACF | DEFB $03 | CLASS_03 | |
1AD0 | DEFW RESTORE | |||
P_DRAW | 1AD2 | DEFB $09 | CLASS_09 | |
1AD3 | DEFB $05 | CLASS_05 | ||
1AD4 | DEFW DRAW | |||
P_COPY | 1AD6 | DEFB $00 | CLASS_00 | |
1AD7 | DEFW COPY | |||
P_LPRINT | 1AD9 | DEFB $05 | CLASS_05 | |
1ADA | DEFW LPRINT | |||
P_LLIST | 1ADC | DEFB $05 | CLASS_05 | |
1ADD | DEFW LLIST | |||
P_SAVE | 1ADF | DEFB $0B | CLASS_0B | |
P_LOAD | 1AE0 | DEFB $0B | CLASS_0B | |
P_VERIFY | 1AE1 | DEFB $0B | CLASS_0B | |
P_MERGE | 1AE2 | DEFB $0B | CLASS_0B | |
P_BEEP | 1AE3 | DEFB $08 | CLASS_08 | |
1AE4 | DEFB $00 | CLASS_00 | ||
1AE5 | DEFW BEEP | |||
P_CIRCLE | 1AE7 | DEFB $09 | CLASS_09 | |
1AE8 | DEFB $05 | CLASS_05 | ||
1AE9 | DEFW CIRCLE | |||
P_INK | 1AEB | DEFB $07 | CLASS_07 | |
P_PAPER | 1AEC | DEFB $07 | CLASS_07 | |
P_FLASH | 1AED | DEFB $07 | CLASS_07 | |
P_BRIGHT | 1AEE | DEFB $07 | CLASS_07 | |
P_INVERSE | 1AEF | DEFB $07 | CLASS_07 | |
P_OVER | 1AF0 | DEFB $07 | CLASS_07 | |
P_OUT | 1AF1 | DEFB $08 | CLASS_08 | |
1AF2 | DEFB $00 | CLASS_00 | ||
1AF3 | DEFW OUT_CMD | |||
P_BORDER | 1AF5 | DEFB $06 | CLASS_06 | |
1AF6 | DEFB $00 | CLASS_00 | ||
1AF7 | DEFW BORDER | |||
P_DEF_FN | 1AF9 | DEFB $05 | CLASS_05 | |
1AFA | DEFW DEF_FN | |||
P_OPEN | 1AFC | DEFB $06 | CLASS_06 | |
1AFD | DEFB "," | |||
1AFE | DEFB $0A | CLASS_0A | ||
1AFF | DEFB $00 | CLASS_00 | ||
1B00 | DEFW OPEN | |||
P_CLOSE | 1B02 | DEFB $06 | CLASS_06 | |
1B03 | DEFB $00 | CLASS_00 | ||
1B04 | DEFW CLOSE | |||
P_FORMAT | 1B06 | DEFB $0A | CLASS_0A | |
1B07 | DEFB $00 | CLASS_00 | ||
1B08 | DEFW CAT_ETC | |||
P_MOVE | 1B0A | DEFB $0A | CLASS_0A | |
1B0B | DEFB "," | |||
1B0C | DEFB $0A | CLASS_0A | ||
1B0D | DEFB $00 | CLASS_00 | ||
1B0E | DEFW CAT_ETC | |||
P_ERASE | 1B10 | DEFB $0A | CLASS_0A | |
1B11 | DEFB $00 | CLASS_00 | ||
1B12 | DEFW CAT_ETC | |||
P_CAT | 1B14 | DEFB $00 | CLASS_00 | |
1B15 | DEFW CAT_ETC | |||
Note: the requirements for the different command classes are as follows:
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