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Elite on the BBC Micro

Maths (Arithmetic): antilog (6502SP version)

Name: antilog [View in context] Type: Variable [Compare versions] Category: Maths (Arithmetic) Summary: Binary antilogarithm table
At byte n, the table contains: 2^((n / 2 + 128) / 16) / 256 which equals: 2^(n / 32 + 8) / 256
.antilog FOR I%, 0, 255 B% = INT(2^((I% / 2 + 128) / 16) + 0.5) DIV 256 IF B% = 256 EQUB B%+1 ELSE EQUB B% ENDIF NEXT