C1541-III on the mbed

Page last updated 23 Aug 2011, by Gert van der Knokke. 0 replies c1541, commodore, emulation, iec, mbed

mbed emulating the good old C1541 floppy drive of the C64/C128

/media/uploads/gertk/_scaled_c1541iii_mbed_128_mode.jpg

The code is ported from the C1541-III project of Jan Derogee

The program is available for downloading http://mbed.org/users/gertk/programs/C1541III/lwbxrz, the pin connections (can also be found in the main.c program)

// IEC hardware connections
DigitalInOut nSRQ(p18);     // DIN6 pin 1
DigitalInOut nATN(p17);     // DIN6 pin 3
DigitalInOut nCLK(p16);     // DIN6 pin 4
DigitalInOut nDATA(p15);    // DIN6 pin 5
// DigitalInOut nRESET(p19);

InterruptIn nIRQ(p30);      // external loop: connect to nATN
InterruptIn nRESET(p29);    // DIN6 pin 6

DigitalIn JUMPER_J2(p21);
DigitalIn JUMPER_J3(p22);

DigitalOut myled1(LED1);
DigitalOut myled2(LED2);
DigitalOut myled3(LED3);
DigitalOut myled4(LED4);

#define LED_GREEN myled1
#define LED_RED   myled2

// the SD card interface
SPI spicard(p11, p12, p13); // mosi, miso, sclk
DigitalOut SDCARD_CS(p14);

Remember to format the SD card in FAT16 as this program uses its own FAT routine

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