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vendor:yamaha [2019/02/23 02:10] cr1901 [Getting Started] |
vendor:yamaha [2019/09/23 23:17] lord_nightmare fix old datecode format based on info from @ImATrackMan |
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Line 15: | Line 15: | ||
Yamaha Datecode/ | Yamaha Datecode/ | ||
1981-1989 'old style': | 1981-1989 'old style': | ||
- | | + | |
+ | m = month (1-9 = Jan-Sep, X=oct, Y=nov, Z=dec) | ||
+ | dd = day within month | ||
+ | | ||
1990+ 'new style': | 1990+ 'new style': | ||
Yyww MLlr | Yyww MLlr | ||
Y = year most significant (9 or 0 or 1 for 199x or 200x or 201x) | Y = year most significant (9 or 0 or 1 for 199x or 200x or 201x) | ||
y = year least significant (2 = 1982, 3 = 1983 ... etc ... 9 = 1989) (0 = 1990?) | y = year least significant (2 = 1982, 3 = 1983 ... etc ... 9 = 1989) (0 = 1990?) | ||
+ | ww = week within year | ||
M = Manufacturer code, see table below; old style and new style chips have different tables | M = Manufacturer code, see table below; old style and new style chips have different tables | ||
Ll = lot code/batch code? | Ll = lot code/batch code? | ||
- | ww = week within year | ||
r = die revision | r = die revision | ||
Line 33: | Line 36: | ||
3 = | 3 = | ||
4 (= L) = Hitachi 2 | 4 (= L) = Hitachi 2 | ||
- | 5 = Sharp [probably | + | 5 (= I) = Sharp |
6 = Hitachi | 6 = Hitachi | ||
7 = | 7 = | ||
8 = Hitachi or ROHM (NDIP)? | 8 = Hitachi or ROHM (NDIP)? | ||
+ | 9 = | ||
X = | X = | ||
Y = Hitachi? | Y = Hitachi? | ||
Line 49: | Line 53: | ||
G = Hitachi 1a? | G = Hitachi 1a? | ||
H = Sharp 1 | H = Sharp 1 | ||
- | I = Sharp [probably | + | I (= 5) = Sharp (95% certain) |
L (= 4) = Hitachi 2 | L (= 4) = Hitachi 2 | ||
O = | O = |