diff --git a/seminaries/binrep/qtrvsim_binrep/.gitignore b/seminaries/binrep/qtrvsim_binrep/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..f8ec85e26cda2631b0aa986e8dddb1ac25b4844f
--- /dev/null
+++ b/seminaries/binrep/qtrvsim_binrep/.gitignore
@@ -0,0 +1,3 @@
+*.o
+depend
+qtrvsim_binrep
diff --git a/seminaries/binrep/qtrvsim_binrep/Makefile b/seminaries/binrep/qtrvsim_binrep/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..ee9ef9973538a4d03dfcc72955e7a8ae89f1a3b7
--- /dev/null
+++ b/seminaries/binrep/qtrvsim_binrep/Makefile
@@ -0,0 +1,78 @@
+ARCH=riscv64-unknown-elf
+#ARCH=riscv64-linux-gnu
+
+SOURCES = crt0local.S qtrvsim_binrep.c
+TARGET_EXE = qtrvsim_binrep
+
+CC=$(ARCH)-gcc
+CXX=$(ARCH)-g++
+AS=$(ARCH)-as
+LD=$(ARCH)-ld
+OBJCOPY=$(ARCH)-objcopy
+
+ARCHFLAGS += -mabi=ilp32
+ARCHFLAGS += -march=rv32i
+ARCHFLAGS += -fno-lto
+
+CFLAGS += -ggdb -Os -Wall
+CXXFLAGS+= -ggdb -Os -Wall
+AFLAGS += -ggdb
+LDFLAGS += -ggdb
+LDFLAGS += -nostartfiles
+LDFLAGS += -nostdlib
+LDFLAGS += -static
+#LDFLAGS += -specs=/opt/musl/riscv64-linux-gnu/lib/musl-gcc.specs
+
+CFLAGS += $(ARCHFLAGS)
+CXXFLAGS+= $(ARCHFLAGS)
+AFLAGS += $(ARCHFLAGS)
+LDFLAGS += $(ARCHFLAGS)
+
+OBJECTS += $(filter %.o,$(SOURCES:%.S=%.o))
+OBJECTS += $(filter %.o,$(SOURCES:%.c=%.o))
+OBJECTS += $(filter %.o,$(SOURCES:%.cpp=%.o))
+
+all : default
+
+.PHONY : default clean dep all
+
+%.o:%.S
+ $(CC) -D__ASSEMBLY__ $(AFLAGS) -c $< -o $@
+
+%.o:%.c
+ $(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
+
+%.o:%.cpp
+ $(CXX) $(CXXFLAGS) $(CPPFLAGS) -c $<
+
+%.s:%.c
+ $(CC) $(CFLAGS) $(CPPFLAGS) -S $< -o $@
+
+default : $(TARGET_EXE)
+
+$(TARGET_EXE) : $(OBJECTS)
+ $(CC) $(LDFLAGS) $^ -o $@
+
+dep: depend
+
+depend: $(SOURCES) $(glob *.h)
+ echo '# autogenerated dependencies' > depend
+ifneq ($(filter %.S,$(SOURCES)),)
+ $(CC) -D__ASSEMBLY__ $(AFLAGS) -w -E -M $(filter %.S,$(SOURCES)) \
+ >> depend
+endif
+ifneq ($(filter %.c,$(SOURCES)),)
+ $(CC) $(CFLAGS) $(CPPFLAGS) -w -E -M $(filter %.c,$(SOURCES)) \
+ >> depend
+endif
+ifneq ($(filter %.cpp,$(SOURCES)),)
+ $(CXX) $(CXXFLAGS) $(CPPFLAGS) -w -E -M $(filter %.cpp,$(SOURCES)) \
+ >> depend
+endif
+
+clean:
+ rm -f *.o *.a $(OBJECTS) $(TARGET_EXE) depend
+
+#mips-elf-objdump --source -M no-aliases,reg-names=numeric qtmips_binrep
+
+-include depend
diff --git a/seminaries/binrep/qtrvsim_binrep/crt0local.S b/seminaries/binrep/qtrvsim_binrep/crt0local.S
new file mode 100644
index 0000000000000000000000000000000000000000..57ec197df8c6eeaf2d04783b6d9db065a82ff13d
--- /dev/null
+++ b/seminaries/binrep/qtrvsim_binrep/crt0local.S
@@ -0,0 +1,35 @@
+/* minimal replacement of crt0.o which is else provided by C library */
+
+.globl main
+.globl _start
+.globl __start
+
+.option norelax
+
+.text
+
+__start:
+_start:
+ .option push
+ .option norelax
+ la gp, __global_pointer$
+ .option pop
+ la sp, __stack_end
+ addi a0, zero, 0
+ addi a1, zero, 0
+ jal main
+quit:
+ addi a0, zero, 0
+ addi a7, zero, 93 /* SYS_exit */
+ ecall
+
+loop: ebreak
+ beq zero, zero, loop
+
+.bss
+
+__stack_start:
+ .skip 4096
+__stack_end:
+
+.end _start
diff --git a/seminaries/binrep/qtrvsim_binrep/qtrvsim_binrep.c b/seminaries/binrep/qtrvsim_binrep/qtrvsim_binrep.c
new file mode 100644
index 0000000000000000000000000000000000000000..000a5e8f82fb347e82b9f2e7144b2175ab6f765d
--- /dev/null
+++ b/seminaries/binrep/qtrvsim_binrep/qtrvsim_binrep.c
@@ -0,0 +1,183 @@
+/*******************************************************************
+ Simple program to demostrate binary reprezentation
+ on QtMips emulator developed by Karel Koci and Pavel Pisa.
+
+ qrmips_binrep.c - main and only file
+
+ (C) Copyright 2004 - 2019 by Pavel Pisa
+ e-mail: pisa@cmp.felk.cvut.cz
+ homepage: http://cmp.felk.cvut.cz/~pisa
+ work: http://www.pikron.com/
+ license: any combination GPL, LGPL, MPL or BSD licenses
+
+ *******************************************************************/
+
+#define _POSIX_C_SOURCE 200112L
+
+//#include <stdint.h>
+typedef unsigned int uint32_t;
+
+/*
+ * Next macros provides location of knobs and LEDs peripherals
+ * implemented on QtMips simulator.
+ *
+ * More information can be found on page
+ * https://github.com/ppisa/QtMips
+ */
+
+
+/*
+ * Base address of the region where simple serial port (UART)
+ * implementation is mapped in emulated MIPS address space
+ */
+#define SERIAL_PORT_BASE 0xffffc000
+/*
+ * Byte offset of the 32-bit transition status register
+ * of the serial port
+ */
+#define SERP_TX_ST_REG_o 0x08
+
+/*
+ * Mask of the bit which inform that peripheral is ready to accept
+ * next character to send. If it is zero, then peripheral is
+ * busy by sending of previous character.
+ */
+#define SERP_TX_ST_REG_READY_m 0x1
+/*
+ * Byte offset of the UART transmit register.
+ * When the 32-bit word is written the least-significant (LSB)
+ * eight bits are send to the terminal.
+ */
+#define SERP_TX_DATA_REG_o 0x0c
+
+/*
+ * Base address of the region where knobs and LEDs peripherals
+ * are mapped in the emulated MIPS physical memory address space.
+ */
+#define SPILED_REG_BASE 0xffffc100
+
+/* Valid address range for the region */
+#define SPILED_REG_SIZE 0x00000100
+
+/*
+ * Byte offset of the register which controls individual LEDs
+ * in the row of 32 yellow LEDs. When the corresponding bit
+ * is set (value 1) then the LED is lit.
+ */
+#define SPILED_REG_LED_LINE_o 0x004
+
+/*
+ * The register to control 8 bit RGB components of brightness
+ * of the first RGB LED
+ */
+#define SPILED_REG_LED_RGB1_o 0x010
+
+/*
+ * The register to control 8 bit RGB components of brightness
+ * of the second RGB LED
+ */
+#define SPILED_REG_LED_RGB2_o 0x014
+
+/*
+ * The register which combines direct write to RGB signals
+ * of the RGB LEDs, write to the keyboard scan register
+ * and control of the two additional individual LEDs.
+ * The direct write to RGB signals is orred with PWM
+ * signal generated according to the values in previous
+ * registers.
+ */
+#define SPILED_REG_LED_KBDWR_DIRECT_o 0x018
+
+/*
+ * Register providing access to unfiltered encoder channels
+ * and keyboard return signals.
+ */
+#define SPILED_REG_KBDRD_KNOBS_DIRECT_o 0x020
+
+/*
+ * The register representing knobs positions as three
+ * 8-bit values where each value is incremented
+ * and decremented by the knob relative turning.
+ */
+#define SPILED_REG_KNOBS_8BIT_o 0x024
+
+
+static inline void serp_write_reg(uint32_t base, uint32_t reg, uint32_t val)
+{
+ *(volatile uint32_t *)(base + reg) = val;
+}
+static inline uint32_t serp_read_reg(uint32_t base, uint32_t reg)
+{
+ return *(volatile uint32_t *)(base + reg);
+}
+
+/*
+ * Send single byte by UART port to a terminal, wait for ready
+ * to send first.
+ */
+void serp_tx_byte(int data)
+{
+ while (!(serp_read_reg(SERIAL_PORT_BASE, SERP_TX_ST_REG_o) &
+ SERP_TX_ST_REG_READY_m));
+ serp_write_reg(SERIAL_PORT_BASE, SERP_TX_DATA_REG_o, data);
+}
+
+/*
+ * Write 32-bit hexadecimal number to the terminal.
+ */
+void serp_send_hex(unsigned int val)
+{
+ int i;
+ for (i = 8; i > 0; i--) {
+ char c = (val >> 28) & 0xf;
+ if (c < 10 )
+ c += '0';
+ else
+ c += 'A' - 10;
+ serp_tx_byte(c);
+ val <<= 4;
+ }
+}
+
+/*
+ * The main entry into example program
+ */
+int main(int argc, char *argv[])
+{
+ unsigned char *mem_base = (unsigned char *)SPILED_REG_BASE;
+
+ while (1) {
+ uint32_t rgb_knobs_value;
+ unsigned int uint_val;
+
+ /*
+ * Access register holding 8 bit relative knobs position
+ * The type "(volatile uint32_t*)" casts address obtained
+ * as a sum of base address and register offset to the
+ * pointer type which target in memory type is 32-bit unsigned
+ * integer. The "volatile" keyword ensures that compiler
+ * cannot reuse previously read value of the location.
+ */
+ rgb_knobs_value = *(volatile uint32_t*)(mem_base + SPILED_REG_KNOBS_8BIT_o);
+
+ /* Store the read value to the register controlling individual LEDs */
+ *(volatile uint32_t*)(mem_base + SPILED_REG_LED_LINE_o) = rgb_knobs_value;
+
+ /*
+ * Store RGB knobs values to the corersponding components controlling
+ * a color/brightness of the RGB LEDs
+ */
+ *(volatile uint32_t*)(mem_base + SPILED_REG_LED_RGB1_o) = rgb_knobs_value;
+
+ *(volatile uint32_t*)(mem_base + SPILED_REG_LED_RGB2_o) = ~rgb_knobs_value;
+
+ /* Assign value read from knobs to the basic signed and unsigned types */
+ uint_val = rgb_knobs_value;
+
+ /* Print values */
+ serp_send_hex(uint_val);
+ serp_tx_byte('\n');
+ }
+
+ return 0;
+}
diff --git a/seminaries/qtrvsim/qtmips_template/change_me.S b/seminaries/qtrvsim/qtmips_template/change_me.S
index 45d3f50a711c720d117197813916ef088567d2d2..ffe119a5c4f9e66eef48108e4b6651bad5f7ed32 100644
--- a/seminaries/qtrvsim/qtmips_template/change_me.S
+++ b/seminaries/qtrvsim/qtmips_template/change_me.S
@@ -3,6 +3,8 @@
.globl _start
.globl __start
+.option norelax
+
.text
__start: