TEXAS INSTRUMENTS
BUSINESS PRO-MLB1-2
| 
 Processor  | 
 80286  | 
| 
 Processor Speed  | 
 6/8/10/12/16/20MHz  | 
| 
 Chip Set  | 
 Texas Instruments  | 
| 
 Max. Onboard DRAM  | 
 640KB  | 
| 
 Cache  | 
 None  | 
| 
 BIOS  | 
 Texas Instruments  | 
| 
 Dimensions  | 
 220mm x 270mm  | 
| 
 I/O Options  | 
 Memory card, parallel port, serial port  | 
| 
 NPU Options  | 
 80287  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Expansion bus connector  | 
 J2  | 
 64KB module  | 
 J18 & J19  | 
| 
 Expansion RAM interface connector  | 
 J3  | 
 64KB module  | 
 J16 & J17  | 
| 
 Serial port  | 
 J8  | 
 256KB module  | 
 J14 & J15  | 
| 
 Parallel port  | 
 J9  | 
 256KB module  | 
 J16 & J17  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper/Switch  | 
 Position  | |
| » | 
 Speaker select external  | 
 E1 & E3  | 
 Connected to speaker  | 
| 
 Speaker select monitor  | 
 E1 & E2  | 
 closed  | |
| » | 
 Factory configured - do not alter  | 
 F1  | 
 N/A  | 
| » | 
 Factory configured - do not alter  | 
 J1  | 
 N/A  | 
| » | 
 Monitor type select color  | 
 SW1/switch 1  | 
 on  | 
| 
 Monitor type select monochrome  | 
 SW1/switch 1  | 
 off  | |
| » | 
 Parallel port select LPT1  | 
 SW1/switch 2  | 
 off  | 
| 
 Parallel port select LPT2  | 
 SW1/switch 2  | 
 on  | |
| » | 
 Serial port select COM1  | 
 SW1/switch 3  | 
 off  | 
| 
 Serial port select COM2  | 
 SW1/switch 3  | 
 on  | |
| 
 DRAM CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 SW1/Switch 1  | 
| 
 512KB  | 
 (2) 256KB Modules  | 
 NONE  | 
 off  | 
| 
 640KB  | 
 (2) 256KB Modules  | 
 (2) 64KB Modules  | 
 on  | 
| 
 MAIN LOGIC BOARD SELF-TEST LED’S  | ||||
| 
 Green  | 
 Yellow  | 
 Blue  | 
 Item failed  | 
 Message  | 
| 
 On  | 
 On  | 
 On  | 
 CPU  | 
 None  | 
| 
 On  | 
 On  | 
 Off  | 
 8142 test keyboard  | 
 None  | 
| 
 On  | 
 Off  | 
 On  | 
 8254 Timer 1 test  | 
 0001  | 
| 
 On  | 
 Off  | 
 Off  | 
 ROM CRC check  | 
 0002  | 
| 
 Off  | 
 On  | 
 On  | 
 CMOS RAM test  | 
 0003  | 
| 
 Off  | 
 On  | 
 Off  | 
 Mem. refresh test  | 
 0004  | 
| 
 Off  | 
 Off  | 
 On  | 
 0-256K RAM test  | 
 0005  | 
| 
 Off  | 
 Off  | 
 Off  | 
 Turbo mode test  | 
 0006  | 
| 
 Off  | 
 Off  | 
 Off  | 
 Turbo parity error  | 
 0008  | 
| 
 Off  | 
 Off  | 
 On  | 
 Nonturbo partiy error  | 
 0008  | 
| 
 On  | 
 On  | 
 On  | 
 8259 test  | 
 0007  | 
| 
 Off  | 
 Off  | 
 Off  | 
 8254 timer interrupt  | 
 0012  | 
| 
 On  | 
 On  | 
 Off  | 
 Protected mode test  | 
 0020  | 
| 
 On  | 
 Off  | 
 On  | 
 8254 timer 2 test  | 
 0001  | 
| 
 On  | 
 Off  | 
 Off  | 
 DMA test  | 
 0051  |