Hallo,
habe auch Jeff´s Seite gelesen, dass es jetzt einen write support für den HxC SD Floppy Emulator gibt.
ZitatAlles anzeigen-------------------------------------------------------------------------------
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-----------H----H--X----X-----CCCCC----22222----0000-----0000------11----------
----------H----H----X-X-----C--------------2---0----0---0----0--1--1-----------
---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------
--------H----H----X--X----C----------2-------0----0---0----0-----1-------------
-------H----H---X-----X---CCCCC-----222222----0000-----0000----1111------------
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----------------------------------------------------- Bitte melde dich an, um diesen Link zu sehen. --
-------------------------------------------------------------------------------22/08/2010: Firmware SD HxCFloppyEmulator v1.3.0.0
- Amiga Write support added :
Note to the Revision B PCB owners :
To activate this new features you need to add a Microchip 23K256 SPI SRAM chip and 4 resistors.
The connection to do is :
23K256 pin 1 -> 220ohms resistor -> PIC18F4620 pin 22
23K256 pin 5 -> 220ohms resistor -> PIC18F4620 pin 27
23K256 pin 6 -> 220ohms resistor -> PIC18F4620 pin 28
23K256 pin 2 -> 220ohms resistor -> PIC18F4620 pin 29
23K256 pin 8 & 7 -> VCC3.3V (this voltage can be found at the capacitor under the sdcard connector or at the output of the regulator)
23K256 pin 4 -> GND
23K256 pin 3 -> Not connected.(a 100nF capacitor is also recommended at the pin 8 of the 23K256)
After this modification you should see the message "SRAM OK" at power up.
Weiß jemand, wie man an die benötigten Teile, vor allem den Microchip kommt?