Blame |
Last modification |
View Log
| Download
| RSS feed
| ?url?
cpu 6502
page 0
; Note that since the mantissa is in in two's complement
; representation, its range is asymmetric towards zero. It
; can represent -2.0, but not +2.0. So if the absolute
; value is an exact power of two, the exponent for the
; negative number is one less:
dcm 1.0 ; 80 40 00 00 -> 1.0 * 2^0
dcm 10.0 ; 83 50 00 00 -> 1.25 * 2^3
dcm -1.0 ; 7F 80 00 00 -> -2.0 * 2^-1
dcm 128.0 ; 87 40 00 00 -> 1.0 * 2^7
dcm -0.125 ; 7c 80 00 00 -> -2.0 * 2^-4
dcm +3 ; 81 60 00 00 -> 1.5 * 2^1
dcm +4 ; 82 40 00 00 -> 1.0 * 2^2
dcm +5 ; 82 50 00 00 -> 1.125 * 2^2
dcm +7 ; 82 70 00 00 -> 1.75 * 2^2
dcm +12 ; 83 60 00 00 -> 1.5 * 2^3
dcm +15 ; 83 78 00 00 -> 1.875 * 2^3
dcm +17 ; 84 44 00 00 -> 1.0625 * 2^4
dcm +20 ; 84 50 00 00 -> 1.25 * 2^4
dcm +60 ; 85 78 00 00 -> 1.875 * 2^5
dcm -3 ; 81 A0 00 00 -> -1.5 * 2^1
dcm -4 ; 81 80 00 00 -> -1.0 * 2^2
dcm -5 ; 82 B0 00 00 -> -1.125 * 2^2
dcm -7 ; 82 90 00 00 -> -1.75 * 2^2
dcm -12 ; 83 A0 00 00 -> -1.5 * 2^3
dcm -15 ; 83 88 00 00 -> -1.875 * 2^3
dcm -17 ; 84 BC 00 00 -> -1.0625 * 2^4
dcm -20 ; 84 B0 00 00 -> -1.25 * 2^4
dcm -60 ; 85 88 00 00 -> -1.875 * 2^5
;dcm 0.4342945 ; ln(10) : 7E 6F 2D ED
;dcm 1.4142136 ; sqrt(2) : 80 5A 82 7A
;dcm 0.69314718 ; ln(2) : 7F 58 B9 0C
;dcm 1.2920074 ; a1 : 80 52 B0 40
;dcm -2.6398577 ; mb : 81 AB 86 49
;dcm 1.6567626 ; c : 80 6A 08 66
dcm 0.5 ; 1/2 : 7F 40 00 00 -> 1.0 * 2^-1
;dcm 1.4426950409 ; ld(e) : 80 5C 55 1E
;dcm 87.417497202 ; a2 : 86 57 6A E1
;dcm 617.9722695 ; b2 : 89 4D 3F 1D
;dcm .03465735903 ; c2 : 7B 46 FA 70
;dcm 9.9545957821 ; d : 83 4F A3 03