user`s manual
Contents
1. as many configurations 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 2Visit the source code reposity https github com rkujawa ppa pemcia sram Technical details O IC1 amp _Tuvzooxapoci S i ng on fe 3 ata As Xx se 85y E 05 20 o AS6C3216 55 a S ge 7 0 1uF Ka Ta 0 1uF a 8 5 lt 5 74LCX541TTR a a TALCX245MTC Baz offs a o c3 ONS S a IC7 Lu Ss Ss oc od c F 4 SW1 XC9536XL_44VQ t z a 8 74LCX245MTC a OFS C6 8 s C6 IC2 G tuF 3 5 c1001uF 0 Te N 3 5 E z t a of 74LOX245MTC co our8e 5 C13 g 0 1UF 6 OF OT 5 D SAKURA 4MB SRAM v2 1 Revision 2 x Sakura boards are built around Alliance Memory AS6C3216 which is a 55ns 32 megabit SRAM chip with 16 bit data bus The memory is accessible within high 4MB of Zorro 2 memory 0x600000 0x9FFFFF range Control signals for SRAM are generated by Xilinx XC9536XL CPLD based on PCMCIA slot access signals This expansion is a completely autoconfiguring device Memory is auto matically added to the system memory pool by Kickstart Autoconfiguration process is done according to the Card Informa2. is mode take the following steps Turn off your Amiga and remove the Sakura board Set the RAM disk switch into disk position Turn on your Amiga instert the Sakura after booting into Workbench Run the PrepCard application Select Prepare as disk option After your card is successfully prepared reboot the Amiga Notice the new volume named Empty on your Workbench screen Enjoy your temporary 4MB storage The card in this mode is handed by device CCO which is provided by the Kickstart Troubleshooting Q After powering up the Amiga the memory does not appear on the Workbench bar and the output of ShowConfig command A Check if the card is properly inserted into PCMCIA slot Check if the RAM Disk switch is in the RAM position Reboot the Amiga Q The memory is not automatially added to the system if Sakura card is inserted when Amiga is already powered on A The probe procedure for PCMCIA memory is executed only during system startup Reboot the Amiga to see the additional memory Q PrepCard utility refuses to start stating that memory is already con figured A It is not necessary to use PrepCard with Sakura board configured as RAM Predefined CIS settings are selected with RAM Disk switch It is possible to view the current CIS settings by starting the PrepCard just after inserting the card into Amiga i e before reboot Q Performance of my Amiga 1200 dropped after installing the card A Be sure that RAM d
3. isk switch is in RAM position If not then turn off your Amiga completely wait a few seconds and set the switch in RAM position After power on you should notice considerable speedup Acknowledgements Sakura expansion was designed by Radostaw strim Kujawa and Jarostaw jarob Bieli ski The original idea was suggested on PPA pl forum by Ro man Workshop All schematics and board layout files are licensed under Creative Commons Attribution ShareAlike 4 0 license CPLD core source is licensed under MIT license The card is made in Poland and conforms to RoHS standard All new cards sold through our exclusive dealer RetroAmi are covered by 24 months warranty Due to open source nature of the project note that only cards produced by us and therefore sold through RetroAmi are covered by this warranty In case of necessary service repairs please contact the shop directly Do not attempt to repair the card yourself it will void warranty Do not remove the sticker on the back of the card it contains serial number Please save the invoice bill as a proof of transaction Thanks to everyone who preordered the board you made this project hap pen Contact In case of any questions inquires please contact RetroAmi http retroami com pl
4. ks sakura 4MB PCMCIA SRAM User s Manual Low cost Fast RAM expansion for Amiga 600 1200 September 11 2014 Overview Thank you for purchasing Sakura 4MB PCMCIA SRAM expansion This prod uct has the following features Adds 4MB of Fast RAM to Amiga 600 or Amiga 1200 Accelerates unexpanded Amiga 1200 to at least 1 67 MIPS according to SysInfo Built using modern high performance 55ns SRAM ICs Very simple installation just insert the card into PCMCIA slot on the left side of Amiga Compatible with all PCMCIA friendly accelerators and memory expan siond Open source desigiP under CC BY SA board and MIT CPLD core licenses Made by Amigans for Amigans Installation The installation process is very easy To install the expansion perform the following steps Power down your Amiga Slide the expansion card into PCMCIA slot located on the left side of your computer The card s components should be facing upwards Be sure the RAM disk switch is in RAM position 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 on the Workbench top menu bar or with the avail or ShowConfig commands Popular SysInfo tool will report the additional 4MB of memory under card resource name lWe did our best to ensure that this card works on
5. tion 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 If necessary it could be added manu ally with AddMem command avaialble on aminet although this is not required during normal operation Sakura expansion 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 Kick start automatically reconfigures Gayle for 100ns access according to CIS This results in some performance increase 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 physical dimensions of the card are smaller While in theory this card should work with other devices using it with computers other than Amiga 600 1200 was never tested and is discouraged Temporary disk mode It is possible to use the Sakura board as temporary virtual disk To switch the board into th
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