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MMC2IEC
NEWS!
It has come to my attention, that it is finally possible to buy assembled and ready-to-run MMC2IEC hardware. The shop NKC Electronics has started a production of MMC2IEC devices which (save a little change in the pin assignment on the Atmel) are completely similar to my MMC2IEC.
Have a look at the: MMC2IEC commodore disk drive emulation device
I will not create more batches of MMC2IEC. It would even be a stretch to call the one batch I made a "batch", it was merely a test run. For the reference, I will keep my description of the MMC2IEC PCB rev. 2, that were once for sale below the horizontal ruler.
Lars Ole Pontoppidan, January 2008
MMC2IEC devices for sale
As a service for people interested in getting a MMC2IEC device without having to create a PCB and program the microcontroller themselves, I am making a small batch of MMC2IEC devices for sale.
What do you get
You will get a MMC2IEC rev. 2 printed circuit board (PCB) with all components mounted and soldered, and with the microcontroller programmed with the latest firmware. All you need to do is supply power and connect it to either DTV or C64.
The PCB has the dimensions: 49x36 mm and is similar in layout to my DTV version MMC2IEC pictured here, but there will be SMD components on the bottom side. Have a look at the schematic.
Features of the MMC2IEC rev. 2 PCB:
- The device can be powered either directly or through a 3.3 V low-dropout regulator on the board. The regulator can handle at maximum 6 V. So, either power it directly from the DTV power supply, or from some voltage between 3.5 and 6 V.
- Level interfacing of the IEC signals is included in the design allowing connection with DTV as well as C64. Other IEC devices can also be connected the IEC bus, such as a real 1541 floppy.
- Two device selection jumpers allows hot-switching the IEC device number between 8, 9, 10 and 11.
- The SD-card socket features push/push action to insert and eject. Card detect and write protect is implemented and utilized by the software.
- The firmware can be upgraded with Atmel ISP programming tools.
- Also read about the general features of MMC2IEC on the intro page.