Rampage AT AST Part Number 202079-001 The Rampage AT is a memory expansion adapter for the IBM PC/AT and 100% compatibles running at *6MHz. Memory can be expanded on this board from 512K to 2048K using industry standard 256K dynamic RAM chips with a minimum speed requirement of 120NS. Memory standards supported by the Rampage AT include conventional (base 640K), linear extended, LIM 3.2, LIM 4.0, and EEMS. * Later versions of the Rampage AT are rated for 8MHz operation. The part number on the solder (non-component) side of the board determines which revision you have. If the part number is 202079-302C or 202079-302D, the Rampage is rated for 8MHz operation. Any other revision is rated for 6MHz only. SWITCH SETTINGS SWITCH BLOCK 1 (TEN POSITIONS; ON = TOWARD NUMBERS) RAMPAGE MEMORY DEDICATED TO LINEAR / NON-EXPANDED MEMORY LINEAR MEMORY SW1-1 SW1-2 SW1-3 SW1-4 ------ ----- ----- ----- ----- *128K ON ON ON ON (Default Setting) 256K ON ON ON OFF 384K ON ON OFF ON 512K ON ON OFF OFF 640K ON OFF ON ON 768K ON OFF ON OFF 896K ON OFF OFF ON 1024K ON OFF OFF OFF 1152K OFF ON ON ON 1280K OFF ON ON OFF 1408K OFF ON OFF ON 1536K OFF ON OFF OFF 1664K OFF OFF ON ON 1792K OFF OFF ON OFF 1920K OFF OFF OFF ON 2048K OFF OFF OFF OFF NOTE: The above settings define how much of the memory on the Rampage will be used as conventional (base 640K) and/or extended linear memory. Any memory not used by these settings will be available as EMS expanded memory. If the Rampage is to be used exclusively as EMS expanded memory, set the switches on Bank 2 (below) accordingly, and the above settings will be ignored. BASE I/O ADDRESS ADDRESS SW1-5 SW1-6 SW1-7 SW1-8 ------- ----- ----- ----- ----- 0208h ON ON ON ON *0218h ON ON ON OFF (Default Setting) 0258h ON OFF ON OFF 0268h ON OFF OFF ON 02A8h OFF ON OFF ON 02B8h OFF ON OFF OFF 02E8h OFF OFF OFF ON DUAL PAGE MODE SW1-9 ON=ENABLED OFF=DISABLED NOTE: Dual page mode allows expanded memory to maintain two sets of mapping registers, which ensures proper multitasking operation. Generally, dual page mode is enabled. (SW1-9 ON) SW1-10 N/A ("unused and should be left on" according to AST Research Technical Bulletin TB-0144) SWITCH BLOCK 2 - (EIGHT POSITIONS; ON = TOWARD NUMBERS) STARTING ADDRESS (LINEAR MEMORY INSTALLED PREVIOUS TO RAMPAGE) START ADDRESS SW1 SW2 SW3 SW4 SW5 SW6 SW7 ------------- --- --- --- --- --- --- --- 0K ON ON ON ON ON ON ON 128K ON ON ON ON ON ON OFF 256K ON ON ON ON ON OFF ON 384K ON ON ON ON ON OFF OFF *512K ON ON ON ON OFF ON ON (Default Setting) 640K ON ON ON ON OFF ON OFF 768K ON ON ON ON OFF OFF ON 896K ON ON ON ON OFF OFF OFF 1024K ON ON ON OFF ON ON ON 1152K ON ON ON OFF ON ON OFF 1280K ON ON ON OFF ON OFF ON 1408K ON ON ON OFF ON OFF OFF 1536K ON ON ON OFF OFF ON ON 1664K ON ON ON OFF OFF ON OFF 1792K ON ON ON OFF OFF OFF ON 1920K ON ON ON OFF OFF OFF OFF 2048K ON ON OFF ON ON ON ON 2176K ON ON OFF ON ON ON OFF 2304K ON ON OFF ON ON OFF ON 2432K ON ON OFF ON ON OFF OFF 2560K ON ON OFF ON OFF ON ON 2688K ON ON OFF ON OFF ON OFF 2816K ON ON OFF ON OFF OFF ON 2944K ON ON OFF ON OFF OFF OFF 3072K ON ON OFF ON ON ON ON 4096K (4MB) ON OFF ON ON ON ON ON 5120K (5MB) ON OFF ON OFF ON ON ON 6144K (6MB) ON OFF OFF ON ON ON ON 7168K (7MB) ON OFF OFF OFF ON ON ON 8192K (8MB) OFF ON ON ON ON ON ON 9216K (9MB) OFF ON ON OFF ON ON ON 10240K (10MB) OFF ON OFF ON ON ON ON 11264K (11MB) OFF ON OFF OFF ON ON ON 12288K (12MB) OFF OFF ON ON ON ON ON 13312K (13MB) OFF OFF ON OFF ON ON ON 14336K (14MB) OFF OFF OFF ON ON ON ON 15360K (15MB) OFF OFF OFF OFF ON ON ON ALL RAMPAGE OFF OFF OFF OFF OFF OFF OFF MEMORY PAGED (EMS) SW2-8 - Memory Parity Checking The above list of addresses is not complete. After the 3072K address, we have listed the settings for every megabyte only. Switches 5,6 & 7 determine the addresses between. If you are unable to extrapolate the correct starting address from the above information, contact AST to order the complete documentation. NOTE: Linear memory installed previous to the Rampge would consist of Base memory (maximum 640K) plus extended memory (non-EMS) installed in the system before the Rampage is installed. If the starting address is set below 640K, the Rampage will automatically "backfill" base memory up to 640K, with the remainder of linear memory going to extended memory. You will have to adjust your machines CMOS with your set-up program only if you add conventional or extended linear memory with the Rampage AT. Do not change the set-up to reflect expanded EMS memory. SWITCH BLOCK LOCATIONS +---------------------------------------------------------------+ | |SW1 | |SW2 | | +--- | +-------+ +-----+ +-+ | | | | | | | | | | | | | | | | | | | | | | +-+ +----------------------------------+ +-+ +----+ | +--------+ +------------+ |