troed wrote:Yeah it does sound strange. However, while the Mega ST schematics are from 1986, you can find the part number also in the Mega STE service manual from 1991:
U17 C025914 IC CUSTOM SHIFTER
U31 or C101608 IC CUSTOM FULL SHIFTER (w/D/A) U31
STF (Non STE) parts on Mega STE service manual ??? Where do you see that?
May be you mean Mega ST, and not Mega STE Service Manual? But then I can't find it online.