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vendor:yamaha [2019/05/06 14:40] lord_nightmare I new = 5 old = Sharp, we think? |
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 | ||