another mysterious chip (Chris M)

Your mystery chip is clearly Motorola, a very good guess is that it's a 6845 CRT controller chip, or at least a derivative thereof. Message: 7 Date: Sun, 19 Mar 2006 20:28:15 -0800 (PST) From: Chris M <chrism3667 at yahoo.com> Subject: another mysterious chip To: tech <cctech at classiccmp.org> Message-ID: <20060320042815.79263.qmail at web61019.mail.yahoo.com> Content-Type: text/plain; charset=iso-8859-1 First line: circle possibly with M in it, INMOS B. Second line: IMSG170S35 (pretty sure). Third line: 8611 - obviously date of manufacture. Chip has a gold cover, and is present on a dual 8-bit graphics card made by Vermont Microsystems, 80188 on board (similar to an IBM PGA card). Works in a P166MMX DTK mobo...but not in my IBM PC/AT. And yer know what else...it emulates CGA (pretty well seemingly, but only tested it with QBasic thus far). O for the drivers to access its wild advanced modes *snifful*.