diff --git a/src/cfg.c b/src/cfg.c
new file mode 100644
index 0000000..3d05599
--- /dev/null
+++ b/src/cfg.c
@@ -0,0 +1,59 @@
+#include "cfg.h"
+#include "config.h"
+#include "uart.h"
+#include "fileops.h"
+
+cfg_t CFG = {
+  .cfg_ver_maj = 1,
+  .cfg_ver_min = 0,
+  .last_game_valid = 0,
+  .vidmode_menu = VIDMODE_AUTO,
+  .vidmode_game = VIDMODE_AUTO,
+  .pair_mode_allowed = 0,
+  .bsx_use_systime = 0,
+  .bsx_time = 0x0619970301180530LL
+};
+
+int cfg_save() {
+  int err = 0;
+  file_open(CFG_FILE, FA_CREATE_ALWAYS | FA_WRITE);
+  if(file_writeblock(&CFG, 0, sizeof(CFG)) < sizeof(CFG)) {
+    err = file_res;
+  }
+  file_close();
+  return err;
+}
+
+int cfg_load() {
+  int err = 0;
+  file_open(CFG_FILE, FA_READ);
+  if(file_readblock(&CFG, 0, sizeof(CFG)) < sizeof(CFG)) {
+    err = file_res;
+  }
+  file_close();
+  return err;
+}
+
+int cfg_save_last_game(uint8_t *fn) {
+  int err = 0;
+  file_open(LAST_FILE, FA_CREATE_ALWAYS | FA_WRITE);
+  err = f_puts((const TCHAR*)fn, &file_handle);
+  file_close();
+  return err;
+}
+
+int cfg_get_last_game(uint8_t *fn) {
+  int err = 0;
+  file_open(LAST_FILE, FA_READ);
+  f_gets((TCHAR*)fn, 255, &file_handle);
+  file_close();
+  return err;
+}
+
+void cfg_set_last_game_valid(uint8_t valid) {
+  CFG.last_game_valid = valid;
+}
+
+uint8_t cfg_is_last_game_valid() {
+  return CFG.last_game_valid;
+}
diff --git a/src/cfg.h b/src/cfg.h
new file mode 100644
index 0000000..f45eabe
--- /dev/null
+++ b/src/cfg.h
@@ -0,0 +1,39 @@
+#ifndef _CFG_H
+#define _CFG_H
+
+#include <stdint.h>
+
+#define CFG_FILE ((const uint8_t*)"/sd2snes/sd2snes.cfg")
+#define LAST_FILE ((const uint8_t*)"/sd2snes/lastgame.cfg")
+
+typedef enum {
+  VIDMODE_AUTO = 0,
+  VIDMODE_60,
+  VIDMODE_50
+} cfg_vidmode_t;
+
+typedef struct _cfg_block {
+  uint8_t cfg_ver_maj;
+  uint8_t cfg_ver_min;
+  uint8_t last_game_valid;
+  uint8_t vidmode_menu;
+  uint8_t vidmode_game;
+  uint8_t pair_mode_allowed;
+  uint8_t bsx_use_systime;
+  uint64_t bsx_time;
+} cfg_t;
+
+int cfg_save(void);
+int cfg_load(void);
+
+int cfg_save_last_game(uint8_t *fn);
+int cfg_get_last_game(uint8_t *fn);
+
+cfg_vidmode_t cfg_get_vidmode_menu(void);
+cfg_vidmode_t cfg_get_vidmode_game(void);
+
+void cfg_set_last_game_valid(uint8_t);
+uint8_t cfg_is_last_game_valid(void);
+uint8_t cfg_is_pair_mode_allowed(void);
+
+#endif
diff --git a/src/sysinfo.c b/src/sysinfo.c
new file mode 100644
index 0000000..354f575
--- /dev/null
+++ b/src/sysinfo.c
@@ -0,0 +1,127 @@
+#include <arm/NXP/LPC17xx/LPC17xx.h>
+#include <arm/bits.h>
+#include <string.h>
+#include "config.h"
+#include "diskio.h"
+#include "ff.h"
+#include "timer.h"
+#include "uart.h"
+#include "fileops.h"
+#include "memory.h"
+#include "snes.h"
+#include "fpga.h"
+#include "fpga_spi.h"
+#include "cic.h"
+#include "sdnative.h"
+
+#include "sysinfo.h"
+
+static uint32_t sd_tacc_max, sd_tacc_avg;
+
+void sysinfo_loop() {
+  sd_tacc_max = 0;
+  sd_tacc_avg = 0;
+  while(sram_readbyte(SRAM_CMD_ADDR) != 0x00) {
+    write_sysinfo();
+    delay_ms(100);
+  }
+}
+
+void write_sysinfo() {
+  uint32_t sram_addr = SRAM_SYSINFO_ADDR;
+  char linebuf[40];
+  int len;
+  int sd_ok = 0;
+  uint8_t *sd_cid = sdn_getcid();
+  uint32_t sd_tacc_max_int = sd_tacc_max / 1000;
+  uint32_t sd_tacc_max_frac = sd_tacc_max - (sd_tacc_max_int * 1000);
+  uint32_t sd_tacc_avg_int = sd_tacc_avg / 1000;
+  uint32_t sd_tacc_avg_frac = sd_tacc_avg - (sd_tacc_avg_int * 1000);
+  uint16_t numfiles = sram_readshort(SRAM_DB_ADDR+12);
+  uint16_t numdirs = sram_readshort(SRAM_DB_ADDR+14);
+  int32_t sysclk = get_snes_sysclk();
+
+  len = snprintf(linebuf, sizeof(linebuf), "Firmware version: %s", CONFIG_VERSION);
+  sram_writeblock(linebuf, sram_addr, 40);
+  sram_memset(sram_addr+len, 40-len, 0x20);
+  sram_addr += 40;
+  len = snprintf(linebuf, sizeof(linebuf), "                                        ");
+  sram_writeblock(linebuf, sram_addr, 40);
+  sram_memset(sram_addr+len, 40-len, 0x20);
+  sram_addr += 40;
+  if(disk_state == DISK_REMOVED) {
+    sd_tacc_max = 0;
+    sd_tacc_avg = 0;
+    len = snprintf(linebuf, sizeof(linebuf), "                                        ");
+    sram_writeblock(linebuf, sram_addr, 40);
+    sram_memset(sram_addr+len, 40-len, 0x20);
+    sram_addr += 40;
+    len = snprintf(linebuf, sizeof(linebuf), "         *** SD Card removed ***        ");
+    sram_writeblock(linebuf, sram_addr, 40);
+    sram_memset(sram_addr+len, 40-len, 0x20);
+    sram_addr += 40;
+    len = snprintf(linebuf, sizeof(linebuf), "                                        ");
+    sram_writeblock(linebuf, sram_addr, 40);
+    sram_memset(sram_addr+len, 40-len, 0x20);
+    sram_addr += 40;
+    len = snprintf(linebuf, sizeof(linebuf), "                                        ");
+    sram_writeblock(linebuf, sram_addr, 40);
+    sram_memset(sram_addr+len, 40-len, 0x20);
+    sram_addr += 40;
+    sd_ok = 0;
+  } else {
+    len = snprintf(linebuf, sizeof(linebuf), "SD Maker/OEM:    0x%02x, \"%c%c\"", sd_cid[1], sd_cid[2], sd_cid[3]);
+    sram_writeblock(linebuf, sram_addr, 40);
+    sram_memset(sram_addr+len, 40-len, 0x20);
+    sram_addr += 40;
+    len = snprintf(linebuf, sizeof(linebuf), "SD Product Name: \"%c%c%c%c%c\", Rev. %d.%d", sd_cid[4], sd_cid[5], sd_cid[6], sd_cid[7], sd_cid[8], sd_cid[9]>>4, sd_cid[9]&15);
+    sram_writeblock(linebuf, sram_addr, 40);
+    sram_memset(sram_addr+len, 40-len, 0x20);
+    sram_addr += 40;
+    len = snprintf(linebuf, sizeof(linebuf), "SD Serial No.:   %02x%02x%02x%02x, Mfd. %d/%02d", sd_cid[10], sd_cid[11], sd_cid[12], sd_cid[13], 2000+((sd_cid[14]&15)<<4)+(sd_cid[15]>>4), sd_cid[15]&15);
+    sram_writeblock(linebuf, sram_addr, 40);
+    sram_memset(sram_addr+len, 40-len, 0x20);
+    sram_addr += 40;
+    if(sd_tacc_max)
+      len = snprintf(linebuf, sizeof(linebuf), "SD acc. time: %ld.%03ld / %ld.%03ld ms avg/max", sd_tacc_avg_int, sd_tacc_avg_frac, sd_tacc_max_int, sd_tacc_max_frac);
+    else
+      len = snprintf(linebuf, sizeof(linebuf), "SD acc. time: measuring...  ");
+    sram_writeblock(linebuf, sram_addr, 40);
+    sram_memset(sram_addr+len, 40-len, 0x20);
+    sram_addr += 40;
+    sd_ok = 1;
+  }
+  len = snprintf(linebuf, sizeof(linebuf), "                                        ");
+  sram_writeblock(linebuf, sram_addr, 40);
+  sram_memset(sram_addr+len, 40-len, 0x20);
+  sram_addr += 40;
+  len = snprintf(linebuf, sizeof(linebuf), "CIC state: %s", get_cic_statefriendlyname(get_cic_state()));
+  sram_writeblock(linebuf, sram_addr, 40);
+  sram_memset(sram_addr+len, 40-len, 0x20);
+  sram_addr += 40;
+  if(sysclk == -1)
+    len = snprintf(linebuf, sizeof(linebuf), "SNES master clock: measuring...");
+  else
+    len = snprintf(linebuf, sizeof(linebuf), "SNES master clock: %ldHz    ", get_snes_sysclk());
+  sram_writeblock(linebuf, sram_addr, 40);
+  sram_memset(sram_addr+len, 40-len, 0x20);
+  sram_addr += 40;
+  len = snprintf(linebuf, sizeof(linebuf), "                                        ");
+  sram_writeblock(linebuf, sram_addr, 40);
+  sram_memset(sram_addr+len, 40-len, 0x20);
+  sram_addr += 40;
+  len = snprintf(linebuf, sizeof(linebuf), "Database: %d files, %d dirs", numfiles, numdirs);
+  sram_writeblock(linebuf, sram_addr, 40);
+  sram_memset(sram_addr+len, 40-len, 0x20);
+  sram_addr += 40;
+  len = snprintf(linebuf, sizeof(linebuf), "                                        ");
+  sram_writeblock(linebuf, sram_addr, 40);
+  sram_memset(sram_addr+len, 40-len, 0x20);
+  sram_addr += 40;
+  len = snprintf(linebuf, sizeof(linebuf), "                                        ");
+  sram_writeblock(linebuf, sram_addr, 40);
+  sram_memset(sram_addr+len, 40-len, 0x20);
+  sram_hexdump(SRAM_SYSINFO_ADDR, 13*40);
+  if(sysclk != -1 && sd_ok)sdn_gettacc(&sd_tacc_max, &sd_tacc_avg);
+}
+
diff --git a/src/sysinfo.h b/src/sysinfo.h
new file mode 100644
index 0000000..e0c8003
--- /dev/null
+++ b/src/sysinfo.h
@@ -0,0 +1,7 @@
+#ifndef _SYSINFO_H
+#define _SYSINFO_H
+
+void write_sysinfo(void);
+void sysinfo_loop(void);
+
+#endif