diff --git a/sw/include/spi.h b/sw/include/spi.h
index 9862bc4..2bf0b1b 100644
--- a/sw/include/spi.h
+++ b/sw/include/spi.h
@@ -70,7 +70,8 @@ void spiWriteSecurity(struct ff_spi *spi, uint8_t sr, uint8_t security[256]);
 int spiSetType(struct ff_spi *spi, enum spi_type type);
 int spiRead(struct ff_spi *spi, uint32_t addr, uint8_t *data, unsigned int count);
 int spiIsBusy(struct ff_spi *spi);
-int spiBeginErase(struct ff_spi *spi, uint32_t erase_addr);
+int spiBeginErase32(struct ff_spi *spi, uint32_t erase_addr);
+int spiBeginErase64(struct ff_spi *spi, uint32_t erase_addr);
 int spiBeginWrite(struct ff_spi *spi, uint32_t addr, const void *data, unsigned int count);
 
 struct spi_id spiId(struct ff_spi *spi);
diff --git a/sw/src/spi.c b/sw/src/spi.c
index 4c63236..ebac6b3 100644
--- a/sw/src/spi.c
+++ b/sw/src/spi.c
@@ -32,7 +32,7 @@ static void gpioWrite(int pin, int val) {
         do_mirror |= 1 << pin;
     else
         do_mirror &= ~(1 << pin);
-    // bbspi_do_write(do_mirror);
+    bbspi_do_write(do_mirror);
 }
 
 static int gpioRead(int pin) {
@@ -40,7 +40,7 @@ static int gpioRead(int pin) {
 }
 
 static void gpioSync(void) {
-    bbspi_do_write(do_mirror);
+    // bbspi_do_write(do_mirror);
 }
 
 #define SPI_ONLY_SINGLE
@@ -703,10 +703,10 @@ static int spi_wait_for_not_busy(struct ff_spi *spi) {
 }
 
 int spiIsBusy(struct ff_spi *spi) {
-  return spiReadStatus(spi, 1) & (1 << 0);
+  	return spiReadStatus(spi, 1) & (1 << 0);
 }
 
-int spiBeginErase(struct ff_spi *spi, uint32_t erase_addr) {
+int spiBeginErase32(struct ff_spi *spi, uint32_t erase_addr) {
 	// Enable Write-Enable Latch (WEL)
 	spiBegin(spi);
 	spiCommand(spi, 0x06);
@@ -721,6 +721,21 @@ int spiBeginErase(struct ff_spi *spi, uint32_t erase_addr) {
 	return 0;
 }
 
+int spiBeginErase64(struct ff_spi *spi, uint32_t erase_addr) {
+	// Enable Write-Enable Latch (WEL)
+	spiBegin(spi);
+	spiCommand(spi, 0x06);
+	spiEnd(spi);
+
+	spiBegin(spi);
+	spiCommand(spi, 0xD8);
+	spiCommand(spi, erase_addr >> 16);
+	spiCommand(spi, erase_addr >> 8);
+	spiCommand(spi, erase_addr >> 0);
+	spiEnd(spi);
+	return 0;
+}
+
 int spiBeginWrite(struct ff_spi *spi, uint32_t addr, const void *v_data, unsigned int count) {
 	uint8_t write_cmd = 0x02;
 	const uint8_t *data = v_data;