MMC2IEC commodore disk drive emulation device
Product Description
This product is out of production. It was replaced by a more modern and powerful board: the SD2IEC MMC2IEC SD/MMC card Commodore 64/128 disk drive emulation device
It has always been tricky to transfer data between a PC and a Commodore 64. As the old machine lacks any even remotely modern interfaces, tricks of some sort are always required to do the transfer. The MMC2IEC device can be seen as yet another one of these tricks, but it does so much more.
Description
The MMC2IEC device tries to simulate a 1541 disk drive connected to the C64 using the IEC bus and accessing data from a SD/MMC flash memory card. The MMC2IEC is both greatly limited and greatly extended in features when comparing to the original 1541:
Features: (as of v0.7)
- Supports C64 kernel LOAD and SAVE functions.
- Supports wildcards.
- Supports all? SD and MMC cards.
- Thorough FAT16 and FAT32 support.
- Directory listing and changing supported through LOAD commands.
- PRG file load and save.
- D64 image readonly support. LOAD"$" produces a realistic listing when a D64 image is active.
- T64 image readonly support. LOAD"$" produces a tape contents listing.
- Live configurable to be device 8 or 9, and works with other devices on the bus.
- SD card write protect switch works.
- This device is based on MMC2IEC v0.8
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Pontoppidan's website for more information
This implementation moved the IEC lines from PORTC to PORTB to be able to use the PORTC for JTAG debugging. If you want to burn your own firmware, you need to modify the following lines in config.h file:
// IEC signals
//#define IEC_PIN PINC
//#define IEC_DDR DDRC
//#define IEC_PORT PORTC
#define IEC_PIN PINB
#define IEC_DDR DDRB
#define IEC_PORT PORTB
This implementation moved the IEC lines from PORTC to PORTB to be able to use the PORTC for JTAG debugging. If you want to burn your own firmware, you need to modify the following lines in config.h file:
// IEC signals
//#define IEC_PIN PINC
//#define IEC_DDR DDRC
//#define IEC_PORT PORTC
#define IEC_PIN PINB
#define IEC_DDR DDRB
#define IEC_PORT PORTB
What is included
| MMC2IEC device | ||
| Parts | Qty | Device |
| MMC2IEC | 1 | Assembled MMC2IEC device |
Requirements
Commodore 64,
64C, 128 with serial cable, SD/MMC card, external 5-9V DC power supply (positive center)

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