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vendor:yamaha [2019/09/23 23:17] lord_nightmare fix old datecode format based on info from @ImATrackMan |
vendor:yamaha [2019/09/23 23:18] lord_nightmare add note |
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Line 18: | Line 18: | ||
m = month (1-9 = Jan-Sep, X=oct, Y=nov, Z=dec) | m = month (1-9 = Jan-Sep, X=oct, Y=nov, Z=dec) | ||
dd = day within month | dd = day within month | ||
+ | L might be a manufacturer code, but could also be the msb of the lot code? | ||
| | ||
1990+ 'new style': | 1990+ 'new style': | ||
Line 30: | Line 31: | ||
====== Fabs ====== | ====== Fabs ====== | ||
- | |||
- | 'old style' markings: | ||
- | 1 = | ||
- | 2 = Sharp? | ||
- | 3 = | ||
- | 4 (= L) = Hitachi 2 | ||
- | 5 (= I) = Sharp | ||
- | 6 = Hitachi | ||
- | 7 = | ||
- | 8 = Hitachi or ROHM (NDIP)? | ||
- | 9 = | ||
- | X = | ||
- | Y = Hitachi? | ||
- | Z = Fujitsu | ||
'new style': | 'new style': | ||
Line 56: | Line 43: | ||
L (= 4) = Hitachi 2 | L (= 4) = Hitachi 2 | ||
O = | O = | ||
- | Z = Fujitsu | + | Z = Fujitsu |
====== Chips ====== | ====== Chips ====== |