4MB PCMCIA SRAM User`s Manual
Contents
1. A sakura AMB PCMCIA SRAM User s Manual Low cost Fast RAM expansion for Amiga 600 1200 June 1 2014 Overview Thank you for purchasing Sakura 4MB PCMCIA SRAM expan sion This product has the following features Adds 4MB of Fast RAM to Amiga 600 or Amiga 1200 Accelerates unexpanded Amiga 1200 to 1 67 MIPS ac cording to SysInfo Built using modern high performance 55ns SRAM ICs Very simple installation just insert the card into PCM CIA slot on the left side of Amiga Compatible with all PCMCIA friendly accelerators and memory expansiong Open source design Made by Amigans for Amigans To reduce the price card is delivered without any kind of case The case might be available in the future from 3rd party vendor 1We did our best to ensure that this card works on as many configura tions as possible but some accelerator and Fast RAM expansion designs are inherently incompatible with PCMCIA slot if more than 4MB of memory is installed Note that PCMCIA SRAM should work with them anyway if less than 4MB Fast was installed on the turbo card Of course if you don t have any accelerator you don t have to worry about that Installation The installation process is very easy To install the expansion perform the following steps e Power down your Amiga e Slide the expansion card into PCMCIA slot located on the left side of your computer The card s components should be fac2. ase compared to an unexpanded Amiga 1200 Contrary to popular opinions Amiga 1200 equipped with high performance correclty configured PCMCIA SRAM expansion like this one is performing better than Chip RAM only system CIS ROM is also implemented within XC9536XL CPLD Sakura expansion is electrically compatible with PCMCIA 2 1 standard however physicall dimensions of the card are smaller While in theory this card should work with other devices using it with computers other than Amiga was never tested and is discouraged Acknowledgements This expansion was designed by Rados aw strim Kujawa and Jaros aw jarob Bieli ski The original idea was suggested on PPA pl forum by Roman Workshop Thanks to everyone who preordered the board you made this project happen The card conforms to RoHS standard All new cards sold through our exclusive dealer RetroAmi are covered by 24 months warranty In case of necessary service repairs please contact the shop directly Do not attempt to repair the card yourself it will void warranty Please save the invoice bill as a proof of transaction
3. ing upwards e Turn on your Amiga and enjoy additional 4MB of memory Your Amiga should start as normal albeit a bit faster After installation you can confirm that the board is working correctly by checking amount of available memory with the avail com mand Popular SysInfo tool will report the additional 4MB of memory under card resource name Technical details Revision 2 x Sakura boards are built around Alliance Memory AS6C3216 which is 55ns 32 megabit SRAM chip with 16 bit data bus Control signals for SRAM are generated by Xilinx XC9536XL CPLD based on PCMCIA slot access signals This expansion is a completely autoconfiguring device Mem ory is automatically added to the system memory pool by Kick start Autoconfiguration process is done according to the Card Information Structure CIS provided by the card which is parsed by card resource Naturally this process only takes place during system startup so inserting card into Amiga when it is running does not cause memory to be added Sakura card CIS contains optimal settings that allow best possible PCMCIA slot peformance e On Amiga 600 Gayle chip is configured for 570ns access time by default which results in performance similar to Fast RAM expansions attached on top of 68000 CPU e On Amiga 1200 the default configuration is 250ns access time but Kickstart automatically reconfigures Gayle for 100ns access according to CIS This results in some per formance incre
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