LCOM1920-T5G03

    int r;

    if ((r = get_permissions_first_mbyte()))

        panic("%s: sys_privctl (ADD MEM) failed: %d\n", __func__, r);

    if (vbe_get_mode_information(mode)) {

        printf("%s: failed to get information for mode %x.\n", __func__, mode);

        if (vg_exit()) printf("%s: vg_exit failed to exit to text mode.\n", __func__);

        return 1;

    }

    map_vram(); // if function fails it aborts program

    if (set_graphics_mode(mode)) {

        printf("%s: failed to set graphic mode %x.\n", __func__, mode);

        if (vg_exit()) printf("%s: vg_exit failed to exit to text mode.\n", __func__);

        return 1;

    }

    uint16_t W = get_XRes()/no_rectangles;

    uint16_t H = get_YRes()/no_rectangles;

    uint32_t color, R, G, B;

    for(uint8_t row = 0; row < no_rectangles; ++row){

        for(uint8_t col = 0; col < no_rectangles; ++col){

            if(get_bytes_pixel() == 1){

                color = (first + (row * no_rectangles + col) * step) % (1 << get_bits_pixel());

            }else{

                R = (GET_RED(first) + col*step) % (1 << get_RedMaskSize());

                G = (GET_GRE(first) + row*step) % (1 << get_GreenMaskSize());

                B = (GET_BLU(first) + (col+row)*step) % (1 << get_BlueMaskSize());

                color = SET_COLOR(R,G,B);

            }

            if (vg_draw_rectangle(col*W,row*H,W,H,color)) {

                if (vg_exit()) {

                    printf("%s: vg_exit failed to exit to text mode.\n", __func__);

                    if (free_memory()) printf("%s: lm_free failed\n", __func__);

                }

                return 1;

            }

        }

    }

    /// loop stuff

    int ipc_status;

    message msg;

    /// Keyboard interrupt handling

    uint8_t kbc_irq_bit = KBC_IRQ;

    int kbc_id = 0;

    int kbc_irq = BIT(kbc_irq_bit);

    if (subscribe_kbc_interrupt(kbc_irq_bit, &kbc_id)) {

        if (vg_exit()) {

            printf("%s: vg_exit failed to exit to text mode.\n", __func__);

            if (free_memory()) printf("%s: lm_free failed\n", __func__);

        }

        return 1;

    }

    /// cycle

    int good = 1;

    while (good) {

        /* Get a request message. */

        if ((r = driver_receive(ANY, &msg, &ipc_status)) != 0) {

            printf("driver_receive failed with %d", r);

            continue;

        }

        if (is_ipc_notify(ipc_status)) { /* received notification */

            switch (_ENDPOINT_P(msg.m_source)) {

                case HARDWARE: /* hardware interrupt notification */

                    if (msg.m_notify.interrupts & kbc_irq) { /* subscribed interrupt */

                        kbc_ih();

                        if (scancode[0] == ESC_BREAK_CODE) good = 0;

                    }

                    break;

                default:

                    break; /* no other notifications expected: do nothing */

            }

        } else { /* received standart message, not a notification */

            /* no standart message expected: do nothing */

        }

    }

    if (unsubscribe_interrupt(&kbc_id)) {

        if (vg_exit()) {

            printf("%s: vg_exit failed to exit to text mode.\n", __func__);

            if (free_memory()) printf("%s: lm_free failed\n", __func__);

        }

        return 1;

    };

    if (vg_exit()) {

        printf("%s: vg_exit failed to exit to text mode.\n", __func__);

        if (free_memory()) printf("%s: lm_free failed\n", __func__);

        return 1;

    }

    if (free_memory()) {

        printf("%s: lm_free failed\n", __func__);

        return 1;

    }

    return 0;