diff -Narup old/isp.c new/isp.c
--- old/isp.c	2007-08-01 21:54:20.000000000 +0900
+++ new/isp.c	2007-08-01 21:56:02.000000000 +0900
@@ -17,9 +17,33 @@
 
 void spiHWenable() {
 
-  /* enable SPI, master, 375kHz SCK */
-  SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR1);
-  SPSR = (1 << SPI2X);
+	DDRC &= ~(1<<3);
+	PORTC |= (1<<3);
+	asm volatile("nop\n"::);
+	asm volatile("nop\n"::);
+	if (!(PINC & (1<<3))){
+		/* PC3 = L */
+		/* enable SPI, master, 188kHz SCK */
+		SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR1);
+		SPSR = 0;
+	} else {
+		DDRC |= (1<<2);
+		PORTC &= ~(1<<2);
+		asm volatile("nop\n"::);
+		asm volatile("nop\n"::);
+		if (!(PINC & (1<<3))){
+			/* PC2 = PC3 */
+			/* enable SPI, master, 94kHz SCK */
+			SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR1) | (1 << SPR0);
+			SPSR = 0;
+		} else {
+			/* enable SPI, master, 375kHz SCK */
+			SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR1);
+			SPSR = (1 << SPI2X);
+		}
+		DDRC &= ~(1<<2);
+		PORTC |= (1<<2);
+	}
 }
 
 void ispSetSCKOption(uchar option) {
@@ -46,6 +70,11 @@ void ispDelay() {
 
 void ispConnect() {
 
+	/* added by Yuki */
+	ISP_OUT |= (1 << ISP_MISO);		// MISO pull up
+	DDRC |= (1 << 5);				// PC5 OE
+	PORTC &= ~(1 << 5);				// OE=L
+
   /* all ISP pins are inputs before */
   /* now set output pins */
   ISP_DDR |= (1 << ISP_RST) | (1 << ISP_SCK) | (1 << ISP_MOSI);
@@ -72,6 +101,9 @@ void ispDisconnect() {
   /* switch pullups off */
   ISP_OUT &= ~((1 << ISP_RST) | (1 << ISP_SCK) | (1 << ISP_MOSI));
 
+  /* added by Yuki */
+  DDRC &= ~(1 << 5);	// PC5 OE off
+
   /* disable hardware SPI */
   spiHWdisable();
 }
@@ -98,10 +130,11 @@ uchar ispTransmit_sw(uchar send_byte) {
     }
 
     /* pulse SCK */
+    ispDelay();			/* moved by Yuki */
     ISP_OUT |= (1 << ISP_SCK);     /* SCK high */
     ispDelay();
     ISP_OUT &= ~(1 << ISP_SCK);    /* SCK low */
-    ispDelay();
+    /* ispDelay(); */	/* moved by Yuki */
   }
     
   return rec_byte;