SD2iEC & EPYX FAST LOAD CARTRIDGE V2.1B (Micro SD) for COMMODORE
SD2iEC & EPYX FAST LOAD CARTRIDGE V2.1B (Micro SD) for COMMODORE
Hello,
This is a tested and working circuit. This cartridge has been tested on C64 and C128DCR
This, SD2iEC & Epyx Fast Load Cartridge V2.1B (MICRO SD) PCB is available for both TQFP and DIP package for ATMEGA644P and ATMEGA1284, if you like, you may prefer to use TQFP package AT644P or AT1284, they are usualy cheaper and easy to find than DIP package models.
In this 2.1B version I changed the SD Card module to Micro SD card Module and added an On/Off switch to the Epyx Fast Load cartridge so Commodore 128 users can turn off Epyx Fast Load and continue using the SD2iEC Disk drive emulator in C128 mode.
(Previous V2.0 Version of SD2iEC & EPYX FAST LOAD CARTRIDGE)
Other instructions are the same with first version.
If you want to program TQFP ATMEGA onboard then you should use DIP40 pins for ICSP connections. I used ATmeag644P and ATmega1284P compatible TQFP44 to DIP40 adapter Programmer socket, from aliexpress.com
DIP40 pin 6 = MOSI
DIP40 pin 7 = MISO
DIP40 pin 8 = SCK
DIP40 pin 9 = RST
DIP40 pin 10 = VCC
DIP40 pin 11 = GND
ATMEGA1284 or ATMEGA644 FUSE SETUP
COMPONENTS:
ATMEGA1284 or ATMEGA644 (DIP40) (Requires Programming)
27C512 or W27C512 or 27C64 or 27C128 or 27C256 (DIP28) (Requires Programming)
74LS07 (DIP14)
DIP14 IC SOCKET
DIP28 WIDE IC SOCKET (for eprom)
DIP40 WIDE IC SOCKET (for ATMega)
6 pin MICRO SD Card Module (will be placed to the bottom side) **
3mm RED LED
3mm GREEN LED
2 PCS. 270ohm - 1K 1/4watt RESISTANCE (value changes leds brigtness)
10K 1/4watt RESISTANCE
2.7K 1/4watt RESISTANCE
8 Mhz Passive Quartz Crystal Oscillator
1N4148 DIODE
2 PCS. 33pf ceramic CAPACITORS
1PCS. HEADER JUMPER CAP
4 PCS. RIGHT ANGLE TACTILE BUTTON
6 PCS. 30cm MALE-FEMALE DUPONT CABLE
MICRO SD CARD (4GB will be enough)
3 PCS. 2PIN MALE HEADER
2 PCS. 100nF ceramic CAPACITORS
1 PCS. 0.47μF CAPACITOR
3pin 2.54mm SPDT slide SWITCH (for ON/OFF switch)
You will need a programmer for ATMEGA and EPROM
You can download Epyx Fast Load ROM files from the bottom of this page.
** Before soldering MICRO SD Card Module you should place some isolation tape between PCB and SD card module.
Please choose "Edge connector YES and Bevelling Yes (45°)
Ps. While transfering data (reading or writing) from SD cards it should not be interrupted like power-off or Reset systems. Otherwise that may damage SD cards.
If you have a programmer capable of testing IC chips, such as the 74LS series, you should remember to test them before soldering. Some chips may be defective. (TL866 Minipro Programmer can test some logic ICs)
In order to protect your electronical devices, always turn off your Commodore computer before connecting or disconnecting the cables or any other device.
Gerber files and component list are subject to change without notice. Before paying for the PCBs, be sure to update your orders!
As you can see I have uploaded many projects and I am still working on new projects. If you have any questions, please look for answers online. Unless I specify explicitly, all my projects are tested and confirmed to work under normal circumstances before being shared. I'm sorry I didn't have enough time to answer all the questions.
Use this PCB at your own risk !
Have fun
Thank you.
C64iSTANBUL
SD2iEC & EPYX FAST LOAD CARTRIDGE V2.1B (Micro SD) for COMMODORE
*PCBWay community is a shared platform and we are not responsible for any design issues.
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