BOCA RESEARCH INC. 6401 Congress Avenue Boca Raton, FL. 33487-2841 407-997-6227 The following are BocaRam AT switch settings for various configurations. NOTE: Before setting the switches start with both switch banks all OFF. SECTION 1 - EXPANDED MEMORY SW1 SW2 512, 1024, 1536 ,2048 Expanded all off 4,6 on (see addresses below) Use this setting for expanded memory. You must fill an entire pair of banks with chips (512k increments). Switches Switches SW1 SW2 SW3 SW4 Port Address (Hex) SW5 SW6 Segment Address (Hex) on off off off 208/209 off on D000 (*) default off on off off 218/219 on off A000 off off on off 258/259 off off off on 268/269 (*) default SECTION 2 - CONVENTIONAL & EXPANDED MEMORY 128k Conventional Backfill, 1536 expanded: SW1 SW2 4,8 on, 4,6 on Use this setting for 512k motherboards that you wish to backfill to 640k. Banks 0 and 1 should be filled with 64k chips, The balance of the board, banks 2 thru 7, should be filled with 256k chips according to your specific memory size. NOTE: You may use 256k chips in banks 0 and 1 but you will be wasting 384k; it is not user addressable. SECTION 3 - EXTENDED MEMORY 2048k of Extended (0k extended on system) SW1 SW2 3,6 on all off Use this setting for 2048k of extended memory. Your system board should only have 640k base memory. If you have a 1Meg system, disable the 384 extended memory on your mother board. Set the mother board for 640k conventional and 0k extended via hardware switches, jumpers on the mother board or CMOS setup; consult the System Guide to Operations for your specific computer. 2048 Extended (Plus 512k extended on mother board) SW1 SW2 3,4,6 on all off Use this setting for a system with 512k conventional and 512k extended already installed on your mother board. This will give you 2048k plus 512k for a total of 2560k. SECTION 4 - CONVENTIONAL & EXTENDED MEMORY SW1 SW2 128k Conventional, 1536k extended: 4,6 on all off Use this setting for 512k motherboards that you wish to backfill to 640k. Banks 0 and 1 should be filled with 64k chips. The balance of the board, banks 2 thru 7 should be filled with 256k chips. SECTION - 5 EXTENDED MEMORY ON SYSTEM PLUS ADDITIONAL EXTENDED MEMORY ON BOCARAM/AT SWITCH BLOCK 1 (SW1) SWITCHES 1,2,3,4,5,6,7,8 SWITCH BLOCK 2 (SW2) ALL OFF Table-1 Uses switches 1,2,3,4. on switch block 1 (SW1). Set these switches for the amount of extented memory already installed on your mother board. Table-2 Uses switches 5,6,7,8 on switch block 1 (SW1). Set these switches for the amount of extended memory you wish to allocate on the BOCARAM AT/ board. TABLE-1 SWITCHES 1,2,3,4 TABLE-2 SWITCHES 5,6,7,8 Amount of Extended Memory Amount of extended memory on system board Prior to allocated on the BOCARAM/AT: Adding the BocaRam AT. 0k k 3 on 512 8 on (no extended, 640k system) 512 k, 4 on 1.0 Mbytes, 7 on 1.0 Mbytes, 2 on 1.5 Mbytes, 7,8 on 1.5 Mbytes, 2,4 on 2.0 Mbytes, 6 on 2.0 Mbytes, 2,3 on 2.5 Mbytes, 6,8 on 2.5 Mbytes, 2,3,4 3.0 Mbytes, 6,7 on 3.5 Mbytes, 6,7,8 on 4.0 Mbytes, 5 on All other switches not mentioned should be OFF. SAMPLE A 640k based system. 0k extended. 512k on BocaRam AT. Table 1 - 0k Mbytes Prior to adding the BocaRam AT, switch 3 on SW1. Table 2 - 512k on BocaRam AT using extended, switch 8 on SW1. Use TABLE-1 First to set switches 1,2,3,4. Then use TABLE-2 to set switches 5,6,7,8. SECTION - 6 CONVENTIONAL & EXTENDED CONFIGURING THE BOCARAM/AT FOR CONVENTIONAL AND EXTENDED MEMORY FOR SYSTEMS WITH 512K BASE MEMORY. This section is concerned with adding BOTH conventional and extended memory. To configure the BocaRAM/AT for conventional memory you can use 64kx1 in banks 0 and 1 to bring you base memory to 640K. NOTE: You may use 256k chips in banks 0 ans 1 but you will be wasting 384k; it is not user addressable. SWITCH BLOCK 1 (SW1) SWITCHES 1,2,3,4,5,6,7,8 SWITCH BLOCK 2 (SW2) ALL OFF Amount of Extended Memory Being Added in addition to 128k backfill. 0 M Bytes Extended 4,8 on (128k conventional only) 512k 4,7 on 1.0 M Bytes 4,7,8 on 1.5 M Bytes 4,6 on 2.0 M Bytes 4,6,8 on 2.5 M Bytes 4,6,7 on 3.0 M Bytes 4,6,7,8 on 3.5 M Bytes 4,5 on NOTE: IF THE SYSTEM IS CONFIGURED AS 512 CONVENTIONAL AND 512 EXTENDED, YOU WILL NOT BE ABLE TO BACKFILL CONVENTIONAL AND USE THE REST AS EXTENDED MEMORY SECTION - 7 EXPANDED & EXTENDED MEMORY To use both Expanded and Extended memory, set the amount of memory you wish to allocate to extended (SECTION 5) then set the remaining to Expanded memory (SECTION 1).