diff --git a/src/Makefile b/src/Makefile
index f1c65dc..61a299f 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -55,7 +55,7 @@ TARGET = $(OBJDIR)/sd2snes
 
 
 # List C source files here. (C dependencies are automatically generated.)
-SRC = main.c ff.c ccsbcs.c clock.c uart.c power.c led.c timer.c printf.c sdcard.c spi.c fileops.c rtc.c fpga.c fpga_spi.c snes.c smc.c memory.c filetypes.c faulthandler.c sort.c crc32.c cic.c cli.c
+SRC = main.c ff.c ccsbcs.c clock.c uart.c power.c led.c timer.c printf.c sdcard.c spi.c fileops.c rtc.c fpga.c fpga_spi.c snes.c smc.c memory.c filetypes.c faulthandler.c sort.c crc32.c cic.c cli.c xmodem.c
 
 
 # List Assembler source files here.
diff --git a/src/cli.c b/src/cli.c
index 8fce0e4..b5ef53d 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -44,6 +44,7 @@
 #include "snes.h"
 #include "fpga.h"
 #include "cic.h"
+#include "xmodem.h"
 
 #include "cli.h"
 
@@ -341,6 +342,21 @@ static void cmd_vmode(void) {
   free(buf);
 #endif
 
+void cmd_put(void) {
+  if(*curchar != 0) {
+    file_open((uint8_t*)curchar, FA_CREATE_ALWAYS | FA_WRITE);
+    if(file_res) {
+      printf("FAIL: error opening file %s\n", curchar);
+    } else {
+      printf("OK, start xmodem transfer now.\n");
+      xmodem_rxfile(&file_handle);
+    }
+    file_close();
+  } else {
+    printf("Usage: put <filename>\n");
+  }
+}
+
 /* ------------------------------------------------------------------------- */
 /*   CLI interface functions                                                 */
 /* ------------------------------------------------------------------------- */
@@ -435,6 +451,9 @@ void cli_loop(void) {
       cmd_vmode();
       break;
 
+    case CMD_PUT:
+      cmd_put();
+      break;
     }
   }
 }
diff --git a/src/sdcard.c b/src/sdcard.c
index f50242e..e360f46 100644
--- a/src/sdcard.c
+++ b/src/sdcard.c
@@ -65,6 +65,7 @@
 #include "timer.h"
 #include "uart.h"
 #include "sdcard.h"
+#include "led.h"
 
 // FIXME: Move, make configurable
 static void set_sd_led(uint8_t state) {
@@ -641,13 +642,14 @@ DRESULT sd_write(BYTE drv, const BYTE *buffer, DWORD sector, BYTE count) {
   for (sec=0;sec<count;sec++) {
     errorcount = 0;
     while (errorcount < CONFIG_SD_AUTO_RETRIES) {
+      writeled(1);
       if (cardtype[drv] & CARD_SDHC)
         res = sendCommand(drv, WRITE_BLOCK, sector+sec, 0);
       else
         res = sendCommand(drv, WRITE_BLOCK, (sector+sec)<<9, 0);
 
       if (res != 0) {
-        set_sd_led(0);
+        writeled(0);
         disk_state = DISK_ERROR;
         return RES_ERROR;
       }
@@ -680,7 +682,7 @@ DRESULT sd_write(BYTE drv, const BYTE *buffer, DWORD sector, BYTE count) {
 
       // Wait for write finish
       if (!wait_for_response(0)) {
-        set_sd_led(0);
+        writeled(0);
         disk_state = DISK_ERROR;
         return RES_ERROR;
       }
@@ -694,7 +696,7 @@ DRESULT sd_write(BYTE drv, const BYTE *buffer, DWORD sector, BYTE count) {
       return RES_ERROR;
     }
   }
-
+  writeled(0);
   return RES_OK;
 }
 DRESULT disk_write(BYTE drv, const BYTE *buffer, DWORD sector, BYTE count) __attribute__ ((weak, alias("sd_write")));
diff --git a/src/spi.c b/src/spi.c
index a2194bb..d2847d0 100644
--- a/src/spi.c
+++ b/src/spi.c
@@ -36,20 +36,6 @@
 #define SSP_RFF 3   // Receive FIFO full
 #define SSP_BSY 4   // Busy
 
-// #define SSP_REGS LPC_SSP1
-// #define SSP_PCLKREG PCLKSEL0
-/* SSP0: PCLKSEL1
-   SSP1: PCLKSEL0 */
-// #define SSP_PCLKBIT 20
-/* SSP0: 10
-   SSP1: 20 */
-// #define SSP_DMAID_TX 2
-/* SSP0: 0
-   SSP1: 2 */
-// #define SSP_DMAID_RX 3
-/* SSP0: 1
-   SSP1: 3 */
-
 typedef struct {
   LPC_SSP_TypeDef     *SSP_REGS;
   LPC_GPDMACH_TypeDef *SSP_DMACH;
diff --git a/src/xmodem.c b/src/xmodem.c
new file mode 100644
index 0000000..e3e9ba8
--- /dev/null
+++ b/src/xmodem.c
@@ -0,0 +1,42 @@
+#include <arm/NXP/LPC17xx/LPC17xx.h>
+#include "config.h"
+#include "timer.h"
+#include "uart.h"
+#include "ff.h"
+#include "xmodem.h"
+
+#define ASC_ACK	(0x06)
+#define ASC_NAK (0x15)
+#define ASC_SOH (0x01)
+#define ASC_EOT (0x04)
+
+void xmodem_rxfile(FIL* fil) {
+  uint8_t rxbuf[128], sum=0, sender_sum;
+  uint8_t blknum, blknum2;
+  uint8_t count;
+  uint32_t totalbytes = 0;
+  uint32_t totalwritten = 0;
+  UINT written;
+  FRESULT res;
+  uart_flush();
+  do {
+    sleep_ms(10000);
+    uart_putc(ASC_NAK);
+  } while (uart_getc() != ASC_SOH);
+  do {
+    blknum=uart_getc();
+    blknum2=uart_getc();
+    for(count=0; count<128; count++) {
+      sum += rxbuf[count] = uart_getc();
+      totalbytes++;
+    }
+    sender_sum = uart_getc();
+    res=f_write(fil, rxbuf, 128, &written);
+    totalwritten += written;
+    uart_putc(ASC_ACK);
+  } while (uart_getc() != ASC_EOT);
+  uart_putc(ASC_ACK);
+  uart_flush();
+  sleep_ms(1000);
+  printf("received %ld bytes, wrote %ld bytes. last res = %d\n", totalbytes, totalwritten, res);
+}
diff --git a/src/xmodem.h b/src/xmodem.h
new file mode 100644
index 0000000..9a1c31f
--- /dev/null
+++ b/src/xmodem.h
@@ -0,0 +1,8 @@
+#ifndef _XMODEM_H
+#define _XMODEM_H
+
+#include "ff.h"
+
+void xmodem_rxfile(FIL* fil);
+
+#endif