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vendor:yamaha [2019/02/23 02:07] cr1901 Start "Getting Started" Section |
vendor:yamaha [2019/09/23 23:17] lord_nightmare fix old datecode format based on info from @ImATrackMan |
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| ====== Getting Started ====== | ====== Getting Started ====== | ||
| [[vendor: | [[vendor: | ||
| + | |||
| [[vendor: | [[vendor: | ||
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| 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 32: | 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 48: | 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 = | ||