21xx 486DX-33 MHz (30 Pin SIMM)
J2 External Battery
J3 Power
J6 Diskette
J7 Parallel Port
-- Serial Port A and B
J8 Hard Disk Drive
J9 Keyboard
J10 Mouse
J11 PINs 1 and 2 = Power On LED
PINs 4 and 5 = Hard Disk LED
J12 Riser
J15 VESA Video feature connector
J16 Display
J45 30-Pin Memory SIMM Socket Bank 0,0
J46 30-Pin Memory SIMM Socket Bank 0,1
J47 30-Pin Memory SIMM Socket Bank 0,2
J48 30-Pin Memory SIMM Socket Bank 0,3
J49 30-Pin Memory SIMM Socket Bank 1,0
J50 30-Pin Memory SIMM Socket Bank 1,1
J51 30-Pin Memory SIMM Socket Bank 1,2
J52 30-Pin Memory SIMM Socket Bank 1,3
JP4 BIOS Select
JP7 Reset Switch
JP8 Battery Select
JP10 VGA Enable
JP20 Beeper Enable
JP200 Cache Configuration
JP201 Cache Configuration
JP206 Cache Configuration
JP207 Cache Configuration
JP209 Mouse Enable
JP300 Processor Type
JP305 IRQ9
U300 486DX Processor
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.