29 Jan
2019
29 Jan
'19
6:07 p.m.
On Jan 28, 2019, at 8:26 AM, Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
E.g. my M8100 prints are dated 2/72, and none contain any entries in the
'Revisions' block (lower left). However, they are marked as Rev. D, which is
newer than the KB11-A prints at Bitsaver, which are marked as Rev. C. So I
have no idea what changed to cause the rev update! (The first drawing, the
board layout, does show a listing for 'D', so maybe it was just a layout
change?)
From inspecting the drawings, that change looks to be
related to the addition of the start vector extension that you can see at the top right of
drawing DAPE. You can also see R18 added to the BOM and layout. Now, where did they put
W7, tho? It's like "where's Waldo?" :-)
Incidentally, DAPE is also where you can see changes related to addition of trap 114, in
the K1MX TV input decode on the lower left. Older boards w/o the associated ECOs applied
(like mine) are easily visually identified because they will lack pullup R17 in the upper
right "patch" area of the board.
--FritzM.