Etched in copper on front REV O silkscreend P/N 1001 Etched in copper on back COPYRIGHT SMS 1983 mfg corp. S/N A-2043 A-2043 was hand etched 16MHz Crystal 24MHz Crystal D780C D8255AC-5 P8255A-5 P8088 AY-3-8910 6116 x2 P8254 Empty 40 pin socket at U2 and U50 Empty 24 pin socket at U25 Empty 28 pin socket at U18 .u16 28128 stickered U-16 TRIVIA -2 011586 .u17 28128 stickered U-16 TRIVIA -2 011586 .u19 28128 stickered U-16 TRIVIA DLXE 021281 .u26 2732 stickered #26 073184 the pal's had colored dots on them saved in JEDEC format .32 dmpal10l8nc red red blue .52 dmpal10l8nc red red white .38 dmpal10l8nc blue blue blue .39 dmpal10l8nc green green green .40 dmpal10l8nc pink .110 dmpal10l8nc pink pink .58 dmpal10h8nc brown brown brown .80 dmpal10h8nc blue blue .128 dmpal10h8nc blue brown blue .129 dmpal10h8nc pink green pink .130 dmpal10h8nc pink scratched off .94 dmpal14h4nc green green .109 dmpal14h4nc brown brown .140 dmpal14h4nc brown .141 dmpal14h4nc brown .142 dmpal14h4nc brown .143 dmpal14h4nc brown .144 dmpal14h4nc brown .145 dmpal14h4nc brown WinROMIdent 1.05 ============================ sms.u17:[E5C880A1] Not Found! ============================ sms.u19:[5E10059B] Not Found! ============================ sms.16:[85484AEE] Not Found! ============================ sms.26:[E04BB922] Not Found!