TIME SPECTRUM SB384L (SB-II)                          ASSY 12-10090-xx

SWITCH SETTINGS

+---------------+
|1|2|3|4|5|6|7|8|    SW1:  ON = 1, OFF = 0
+---------------+
 | | | | | | | +---  Split Memory Option      +----------------------------+
 | | | | | | | 1     Enabled                  | On-board memory may be     |
 | | | | | | | 0     Disabled*                | disabled by setting SW1-1  |
 | | | | | | |                                | through SW1-4 ON and SW1-5 |
 | | | | +-+-+---  On-board Memory            | through SW1-8 OFF.         |
 | | | | 0 0 0     64K                        +----------------------------+
 | | | | 1 0 0     128K
 | | | | 0 1 0     192K-256K     
 | | | | 1 1 0     320K-384K
 | | | | 0 0 1     448K
 | | | | 1 0 1     512K - Used only with split memory
 | | | | 0 1 1     576K - Used with/without split memory    
 | | | | 1 1 1     640K-704K - Used only with split memory
 | | | |
 +-+-+-+---  Starting Memory Address    
 0 0 0 0     64K      
 1 0 0 0     128K - With split memory enabled     
 0 1 0 0     192K      
 1 1 0 0     256K - With split memory enabled
 0 0 1 0     320K
 1 0 1 0     384K
 0 1 1 0     448K
 1 1 1 0     512K
 0 0 0 1     576K
 1 0 0 1     640K

+-------+
|1|2|3|4|    SW2: 1=ON, 0=OFF
+-------+
 | | | +---  Calendar/Clock
 | | | 1     Disabled
 | | | 0     Enabled
 | | |
 | | +---  Serial Port
 | | 1     COM1 - 3F8H & Jumper E23-E25 for IRQ4
 | | 0     COM2 - 2F8H & Jumper E25-E27 for IRQ3
 | |
 | +---  Calendar/Clock Address
 | 1     Primary (350H-35FH & 750H-75FH)
 | 0     Secondary (250H-25FH & 650H-65FH)
 |
 +---  Parallel Printer Port
 1     LPT1 - 378H & Jumper E21-E22 for IRQ7
 0     LPT2 - 278H & Jumper E21-E22 for IRQ7 or E22-E24 for IRQ5

JUMPER SETTINGS

Device            Description                   Configuration

Serial Port       RS-232-C interface            E29-E30*
                  TTL interface                 E29-E30 OUT
                  +5V connected to pin 9        E32-E33
                  Ring Indicator to pin 9       E31-E32*

Parallel Port     Centronics interface          E17-E20*
                  Dataproducts interface        E17-E14
                  Unidirectional port control   E15-E18*
                  Bidirectional port control    E12-E15
                  External directional control  E12-E15 & E13-E16
                  Internal directional control  E12-E15 & E16-E19

Memory            Zero wait state enabled       E1-E2*
                  Zero wait state disabled      E2-E3
Memory Parity     Enabled                       E4-E5*
                  Disabled                      E5-E6

SPLIT MEMORY CONFIGURATION

The SB384L supports a split memory addressing option. When this option is
selected, it enables an extra 128K of memory in an area normally reserved for
system use from 832K-960K or D000H-EFFFH. Split memory can be enabled only if the
starting address on the board is 128K or 256K. Also, this memory must be accessed
directly; it is not available to the operating system. The table below shows the
four memory configurations supported with split memory. One of them (576K) is a
standard configuration and may be used with or without the split memory option.

            Bank #      512K        576K        640K        704K

              0         256K        256K        256K        256K
              1         64K         64K         256K        256K
              2         64K         64K         EMPTY       64K
              3         EMPTY       64K         EMPTY       EMPTY
              4         64K         64K         64K         64K
              5         64K         64K         64K         64K

                          Split Memory Configuration

EXTERNAL EQUIPMENT CONNECTIONS

DB25 FEMALE   Parallel Printer Port connector
DB9 MALE      Serial Port connector