diff --git a/Makefile b/Makefile
index 39841c8..7383653 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,9 @@
 .PHONY: all clean
 
-CC = qcc  # ntox86-gcc
+CC = ntox86-gcc
 CXX = g++
 LFLAGS = -Wall #-Vgcc_ntox86
-LIBS = #-l socket
+LIBS = -l ncurses #-l socket
 
 BIN_PATH = ./bin
 SOURCE_PATH = ./src
@@ -14,14 +14,10 @@ SRCS = $(SOURCE_PATH)/main.c
 
 all:
 	mkdir -p $(BIN_PATH)
-	$(CXX) $(LFLAGS) -o $(TARGET) $(SRCS) $(LIBS)
+	$(CC) $(LFLAGS) -o $(TARGET) $(SRCS) $(LIBS)
 
 $(BIN_PATH):
 	mkdir -p $(BIN_PATH)
 
 clean:
 	rm -f $(TARGET)
-
-
-
-
diff --git a/src/main.c b/src/main.c
index 7a62f8c..ae7a5f0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,7 +1,528 @@
+#include <time.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <hw/pci.h>
+#include <string.h>
+#include <ncurses.h>
+#include <inttypes.h>
+#include <hw/pci-full.h>
+
+
+#define MAX_BUS     0xff
+#define MAX_DEV     0x1f
+#define MAX_FUNC    0x07
+
+#define MAX_KEY_COUNT 10
+
+#define CBUTTON_EXIT            KEY_F(10)
+#define CBUTTON_SELECT_UP       KEY_UP
+#define CBUTTON_SELECT_DOWN     KEY_DOWN
+#define CBUTTON_ABOUT_DEVICE    '/'
+#define CBUTTON_ESCAPE          27
+
+#define COLOR_PAIR_TEXT         1
+#define COLOR_PAIR_TEXT_INV     2
+
+#define TO_DEVFUNC(dev, func)   (((dev)<<3)+(func))
+
+
+typedef struct {
+    int x;
+    int y;
+} Point;
+
+typedef struct {
+    int height;
+    int width;
+} Size;
+
+typedef struct device_t {
+    struct device_t *previous;
+    struct device_t *next;
+
+    uint8_t bus;
+    uint8_t device;
+    uint8_t function;
+
+    uint8_t pci_index;
+
+    uint16_t vendor_id;
+    uint16_t device_id;
+    uint16_t command;
+    uint16_t status;
+    uint8_t revision;
+    uint8_t interface;
+    uint8_t subclass;
+    uint8_t class;
+
+    uint16_t ss_vendor_id;
+    uint16_t ss_device_id;
+
+    char *desc_vendor;
+    char *desc_device;
+} Device;
+
+typedef struct {
+    uint8_t wdevices:1;
+    uint8_t waboutd:1;
+} WindowFlags;
+
+
+void init(void);
+void quit(void);
+
+void update(void);
+void draw(void);
+
+void draw_wdevices(void);
+void draw_waboutd(void);
+void draw_device(Device *d, int y, int x);
+
+void fill_devices(void);
+uint8_t get_pci_index(const struct pci_dev_info *dev_info);
+char *get_vendor_description(struct pci_dev_info *dev_info);
+char *get_device_description(struct pci_dev_info *dev_info);
+int devices_between(Device *device_1, Device *device_2);
+int devices_before(Device *device);
+int devices_after(Device *device);
+
+void select_up(void);
+void select_down(void);
+void switch_waboutd(void);
+void hide_all_subwindows(void);
+
+
+
+Size wdevice_size = {0, 0};
+Size waboutd_size = {0, 0};
+int use_color = 0;
+
+
+WINDOW *wdevices = NULL;
+WINDOW *waboutd = NULL;
+
+WindowFlags visible_windows;
+
+Device *first_device = NULL;
+Device *last_device = NULL;
+
+Device *selected_device = NULL;
+
 
 int main(int argc, char *argv[])
 {
-    puts("Hallo, Welt!");
+    fill_devices();
+
+    init();
+
+    refresh();
+    while (1) {
+        draw();
+        update();
+    }
+
+    quit();
+
     return 0;
 }
+
+void init(void)
+{
+    srand((unsigned int)time(NULL));
+    initscr();
+    cbreak();
+    curs_set(FALSE);
+    keypad(stdscr, TRUE);
+    noecho();
+
+    hide_all_subwindows();
+
+    use_color = has_colors() == TRUE;
+
+    if (use_color) {
+        start_color();
+        init_pair(COLOR_PAIR_TEXT, COLOR_WHITE, COLOR_BLACK);
+        init_pair(COLOR_PAIR_TEXT_INV, COLOR_BLACK, COLOR_WHITE);
+    }
+
+    getmaxyx(stdscr, wdevice_size.height, wdevice_size.width);
+    waboutd_size.height = min(wdevice_size.height, 15);
+    waboutd_size.width = min(wdevice_size.width, 60);
+
+    Point waboutd_pos;
+    waboutd_pos.y = (wdevice_size.height-waboutd_size.height)/2;
+    waboutd_pos.x = (wdevice_size.width-waboutd_size.width)/2;
+
+    wdevices = newwin(wdevice_size.height, wdevice_size.width, 0, 0);
+    waboutd = newwin(waboutd_size.height, waboutd_size.width,
+                waboutd_pos.y, waboutd_pos.x);
+}
+
+void update(void)
+{
+    static int is_first = 1;
+    if (is_first) {
+        is_first = 0;
+        return;
+    }
+
+    switch (getch()) {
+        case CBUTTON_EXIT:
+            quit();
+            break;
+        case CBUTTON_SELECT_UP:
+            select_up();
+            break;
+        case CBUTTON_SELECT_DOWN:
+            select_down();
+            break;
+        case CBUTTON_ABOUT_DEVICE:
+            switch_waboutd();
+            break;
+        case CBUTTON_ESCAPE:
+            hide_all_subwindows();
+            break;
+    }
+}
+
+void draw(void)
+{
+    if (visible_windows.wdevices) {
+        draw_wdevices();
+    }
+    if (visible_windows.waboutd) {
+        draw_waboutd();
+    }
+}
+
+void draw_wdevices(void)
+{
+    wclear(wdevices);
+    box(wdevices, ACS_VLINE, ACS_HLINE);
+
+    int x = 2;
+    int y = 0;
+
+    mvwprintw(wdevices, y++, x, " b  d f  vid  did  cmd stat rv  c sc if  ssv  ssd");
+
+    Device *first_device_for_printing = first_device;
+    while (
+        devices_between(first_device_for_printing, selected_device) >
+                                                    wdevice_size.height-6
+    ) {
+        first_device_for_printing = first_device_for_printing->next;
+    }
+
+    if (first_device_for_printing != first_device) {
+        int xx;
+        for (xx = x; xx < wdevice_size.width-2; xx+=2) {
+            mvwprintw(wdevices, y, xx, "/\\");
+        }
+        y++;
+    }
+
+    Device *d;
+    for (d = first_device_for_printing; d != NULL; d = d->next) {
+        draw_device(d, y, x);
+        y++;
+
+        if (y == wdevice_size.height-1) {
+            if (d != last_device) {
+                int xx;
+                for (xx = x; xx < wdevice_size.width-2; xx+=2) {
+                    mvwprintw(wdevices, y-1, xx, "\\/");
+                }
+            }
+            break;
+        }
+    }
+
+    mvwprintw(wdevices, wdevice_size.height-1, 2, "? - about");
+
+    touchwin(wdevices);
+    wrefresh(wdevices);
+}
+
+void draw_waboutd(void)
+{
+    wclear(waboutd);
+    box(waboutd, ACS_VLINE, ACS_HLINE);
+
+    int x = 2;
+    int y = 0;
+
+    mvwprintw(waboutd, y++, x, "%04X %04X %d",
+            selected_device->vendor_id,
+            selected_device->device_id,
+            selected_device->pci_index);
+
+    if (selected_device->desc_vendor) {
+        mvwprintw(waboutd, y++, x, "Vendor: %s", selected_device->desc_vendor);
+    }
+    if (selected_device->desc_device) {
+        mvwprintw(waboutd, y++, x, "Device: %s", selected_device->desc_device);
+    }
+
+    touchwin(waboutd);
+    wrefresh(waboutd);
+}
+
+void draw_device(Device *d, int y, int x)
+{
+    if (use_color && d == selected_device) {
+        wattron(wdevices, COLOR_PAIR(COLOR_PAIR_TEXT_INV));
+    }
+
+    mvwprintw(wdevices, y, x,
+        "%2d %2d %d %04X %04X %04X %04X %02X %02X %02X %02X %04X %04X",
+        d->bus, d->device, d->function, d->vendor_id, d->device_id,
+        d->command, d->status, d->revision,
+        d->class, d->subclass, d->interface,
+        d->ss_vendor_id, d->ss_device_id
+    );
+
+    if (use_color && d == selected_device) {
+        wattroff(wdevices, COLOR_PAIR(COLOR_PAIR_TEXT_INV));
+    }
+}
+
+void quit(void)
+{
+    endwin();
+    exit(0);
+}
+
+void fill_devices(void)
+{
+    if (pci_attach(0) == -1) {
+        fputs("Unable to attach PCI!", stderr);
+        exit(1);
+    }
+
+    Device *previous_device = NULL;
+    Device **next_device = &first_device;
+
+    unsigned short bus, dev, func;
+    for(bus = 0; bus <= MAX_BUS; bus++) {
+        for(dev = 0; dev <= MAX_DEV; dev++) {
+            for(func = 0; func <= MAX_FUNC; func++) {
+                struct pci_dev_info dev_info;
+                memset(&dev_info, 0, sizeof(dev_info));
+
+                dev_info.BusNumber = bus;
+                dev_info.DevFunc = TO_DEVFUNC(dev, func);
+
+                void *handleDevice = pci_attach_device(NULL, PCI_SEARCH_BUSDEV,
+                                                        0, &dev_info);
+
+                if (handleDevice != NULL) {
+                    *next_device = malloc(sizeof(Device));
+                    (*next_device)->previous = previous_device;
+                    (*next_device)->next = NULL;
+
+                    (*next_device)->bus = bus;
+                    (*next_device)->device = dev;
+                    (*next_device)->function = func;
+
+                    (*next_device)->pci_index = get_pci_index(&dev_info);
+
+                    if (pci_read_config(
+                        handleDevice, 0x00, 1, 2,&(*next_device)->vendor_id
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get vendor_id");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x02, 1, 2, &(*next_device)->device_id
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get device_id");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x04, 1, 2, &(*next_device)->command
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get command");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x06, 1, 2, &(*next_device)->status
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get status");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x08, 1, 1, &(*next_device)->revision
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get revision");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x09, 1, 1, &(*next_device)->interface
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get interface");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x0a, 1, 1, &(*next_device)->subclass
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get subclasscode");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x0b, 1, 1, &(*next_device)->class
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get classcode");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x2C, 1, 2,&(*next_device)->ss_vendor_id
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get ss_vendor_id");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x2E, 1, 2, &(*next_device)->ss_device_id
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get ss_device_id");
+                        exit(1);
+                    }
+
+                    pci_detach_device(handleDevice);
+
+                    (*next_device)->desc_vendor = get_vendor_description(&dev_info);
+                    (*next_device)->desc_device = get_device_description(&dev_info);
+
+                    previous_device = *next_device;
+                    last_device = previous_device;
+                    next_device = &(*next_device)->next;
+                }
+            }
+        }
+    }
+
+    selected_device = first_device;
+}
+
+char *get_vendor_description(struct pci_dev_info *dev_info)
+{
+    int i;
+    for (i = 0; i < PCI_VENTABLE_LEN; i++) {
+        if (PciVenTable[i].VenId == dev_info->VendorId) {
+            return PciVenTable[i].VenFull;
+        }
+    }
+    return NULL;
+}
+
+char *get_device_description(struct pci_dev_info *dev_info)
+{
+    int i;
+    for (i = 0; i < PCI_DEVTABLE_LEN; i++) {
+        if (PciDevTable[i].VenId == dev_info->VendorId &&
+            PciDevTable[i].DevId == dev_info->DeviceId) {
+            return PciDevTable[i].ChipDesc;
+        }
+    }
+    return NULL;
+}
+
+uint8_t get_pci_index(const struct pci_dev_info *dev_info)
+{
+    unsigned int bus;
+    unsigned int dev_func;
+
+    uint8_t i;
+    for (i = 0; i < 0xFF; i++) {
+        if (pci_find_device(
+            dev_info->DeviceId, dev_info->VendorId, i, &bus, &dev_func
+        ) != PCI_SUCCESS) {
+            break;
+        }
+        if (bus == dev_info->BusNumber && dev_func == dev_info->DevFunc) {
+            return i;
+        }
+    }
+
+    return 0xFF;
+}
+
+void select_up(void)
+{
+
+    if (selected_device != NULL && selected_device->previous != NULL) {
+        selected_device = selected_device->previous;
+    }
+}
+
+void select_down(void)
+{
+    if (selected_device != NULL && selected_device->next != NULL) {
+        selected_device = selected_device->next;
+    }
+}
+
+void switch_waboutd(void)
+{
+    visible_windows.waboutd = !visible_windows.waboutd;
+}
+
+void hide_all_subwindows(void)
+{
+    memset(&visible_windows, 0, sizeof(visible_windows));
+    visible_windows.wdevices = 1;
+}
+
+int devices_between(Device *device_1, Device *device_2)
+{
+    if (device_1 == NULL || device_2 == NULL || device_1 == device_2) {
+        return 0;
+    }
+
+    int i = 0;
+    Device *d = device_1->next;
+    while (d != NULL) {
+        if (d == device_2) {
+            return i;
+        }
+        i++;
+        d = d->next;
+    }
+
+    return devices_between(device_2, device_1);
+}
+
+int devices_before(Device *device)
+{
+    int i = 0;
+    if (device != NULL) {
+        Device *d;
+        for (d = device->previous; d != NULL; d = d->previous) {
+            i++;
+        }
+    }
+
+    return i;
+}
+
+int devices_after(Device *device)
+{
+    int i = 0;
+    if (device != NULL) {
+        Device *d;
+        for (d = device->next; d != NULL; d = d->next) {
+            i++;
+        }
+    }
+
+    return i;
+}