North Star Micro Disk ControllerMDS-AD3 board (S-100)

Board is being offered for sale inAS-IS and AS-Pictured condition. Non-working.

I plugged this board intomy S-100 test system. System booted up normally.

voltagesout of the power regulators:

7805Regulator 1 reads +5.04V (upper regulator)

7805Regulator 2 reads +4.95V (lower regulator)

78L12Regulator reads +11.83V

Coderead out of onboard PROM:

E800 0E 0A 3A 15 EB 16 30 21 0D E8 C3 D3 E8 3A 01 EA

E810 21 16 E8 C3 4D E8 06 0C 21 1E E8 C3 D1 E8 3A 10

E820 EB E6 40 C2 2D E8 05 C2 18 E8 C3 2A E8 3A 21 EA

E830 3A 31 EA 3A 21 EA C3 4A E8 3A 20 EB E6 01 C2 52

E840 E8 3A 01 EA 3A 11 EA 3A 01 EA 21 39 E8 16 02 C3

E850 D3 E8 21 58 E8 C3 D1 E8 3A 35 EB E6 0F FE 04 C2

E860 52 E8 3A 10 EB E6 04 CA 62 E8 3E 09 3D C2 6C E8

E870 3A 10 EB E6 20 C2 97 E8 3A 21 EA 3A 31 EA 3A 21

E880 EA 21 87 E8 C3 4D E8 21 8D E8 C3 D1 E8 3A 35 EB

E890 E6 0F FE 08 C2 87 E8 06 8C 11 40 EB 3A 10 EB 0F

E8A0 DA AE E8 05 C2 9C E8 0D C2 2D E8 C3 AB E8 1A 67

E8B0 2E 01 77 07 47 1A 77 A8 07 47 2C C2 B5 E8 24 1A

E8C0 77 A8 07 47 2C C2 BF E8 1A A8 C2 A7 E8 25 2E 0A

E8D0 E9 16 01 3A 11 EB 3A 10 EB B7 F2 D6 E8 15 3A 11

E8E0 EB C2 D3 E8 E9 00 00 00 00 00 00 00 00 00 00 00

E8F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 E1 E9

Contentsmatch published file of NSBOOT.BIN, NSBOOT.HEX