27 lines
598 B
ArmAsm
27 lines
598 B
ArmAsm
// #LAYOUT# STD * #TAKE
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// #LAYOUT# X16 BASIC_0 #TAKE-OFFSET 2000
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// #LAYOUT# * BASIC_0 #TAKE
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// #LAYOUT# * * #IGNORE
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//
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// Math package - multiplies FAC1 by RAM
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//
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// Input:
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// - .A - address low byte
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// - .Y - address high byte
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//
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// Note:
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// - C64 Wiki calls it FMULT, this looks like a mistake
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//
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// See also:
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// - [CM64] Computes Mapping the Commodore 64 - page 113
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// - https://www.c64-wiki.com/wiki/Floating_point_arithmetic
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// - https://codebase64.org/doku.php?id=base:kernal_floating_point_mathematics
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//
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mul_MEM_FAC1:
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jsr mov_MEM_FAC2
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// FALLTROUGH to mul_FAC2_FAC1
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