diff --git a/fpga/zsbl/boot.c b/fpga/zsbl/boot.c
index 52473ab46..566393cb6 100644
--- a/fpga/zsbl/boot.c
+++ b/fpga/zsbl/boot.c
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// boot.c
+//
+// Written: Jacob Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Main bootloader entry point
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #include <stddef.h>
 #include "boot.h"
 #include "gpt.h"
@@ -8,54 +37,6 @@
 #include "riscv.h"
 #include "fail.h"
 
-/* int disk_read(BYTE * buf, LBA_t sector, UINT count, BYTE card_type) { */
-
-/*   /\* This is not needed. This has everything to do with the FAT */
-/*      filesystem stuff that I'm not including. All I need to do is */
-/*      initialize the SD card and read from it. Anything in here that is */
-/*      checking for potential errors, I'm going to have to temporarily */
-/*      do without. */
-/*    *\/ */
-/*   // if (!count) return RES_PARERR; */
-/*     /\* if (drv_status & STA_NOINIT) return RES_NOTRDY; *\/ */
-
-/*   uint32_t response[4]; */
-/*   struct sdc_regs * regs = (struct sdc_regs *)SDC; */
-  
-/*     /\* Convert LBA to byte address if needed *\/ */
-/*     if (!(card_type & CT_BLOCK)) sector *= 512; */
-/*     while (count > 0) { */
-/*         UINT bcnt = count > MAX_BLOCK_CNT ? MAX_BLOCK_CNT : count; */
-/*         unsigned bytes = bcnt * 512; */
-/*         if (send_data_cmd(bcnt == 1 ? CMD17 : CMD18, sector, buf, bcnt, response) < 0) return 1; */
-/*         if (bcnt > 1 && send_cmd(CMD12, 0, response) < 0) return 1; */
-/*         sector += (card_type & CT_BLOCK) ? bcnt : bytes; */
-/*         count -= bcnt; */
-/*         buf += bytes; */
-/*     } */
-
-/*     return 0;; */
-/* } */
-
-// Need to convert this
-/* void print_progress(size_t count, size_t max) { */
-/*     const int bar_width = 50; */
-
-/*     float progress = (float) count / max; */
-/*     int bar_length = progress * bar_width; */
-
-/*     printf("\r["); */
-/*     for (int i = 0; i < bar_length; ++i) { */
-/*         printf("#"); */
-/*     } */
-/*     for (int i = bar_length; i < bar_width; ++i) { */
-/*         printf("-"); */
-/*     } */
-/*     printf("] %.2f%%", progress * 100); */
-
-/*     fflush(stdout); */
-/* } */
-
 int disk_read(BYTE * buf, LBA_t sector, UINT count) {
   uint64_t r;
   UINT i;
diff --git a/fpga/zsbl/boot.h b/fpga/zsbl/boot.h
index 25b8a5fcc..0c09a1e52 100644
--- a/fpga/zsbl/boot.h
+++ b/fpga/zsbl/boot.h
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// boot.h
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Header for boot.c, main bootloader entry point
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #ifndef WALLYBOOT
 #define WALLYBOOT 10000
 
diff --git a/fpga/zsbl/fail.c b/fpga/zsbl/fail.c
index 4e6cd8db0..4430c4a8f 100644
--- a/fpga/zsbl/fail.c
+++ b/fpga/zsbl/fail.c
@@ -1,3 +1,33 @@
+///////////////////////////////////////////////////////////////////////
+// fail.c
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Prints information on the uart when a fatal bug is
+//          encountered. Will expand this later.
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #include "fail.h"
 #include "uart.h"
 #include "riscv.h"
diff --git a/fpga/zsbl/fail.h b/fpga/zsbl/fail.h
index da1a2e405..c965265d1 100644
--- a/fpga/zsbl/fail.h
+++ b/fpga/zsbl/fail.h
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// fail.h
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Function prototype for fail,
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #pragma once
 #include <stdint.h>
 
diff --git a/fpga/zsbl/gpt.c b/fpga/zsbl/gpt.c
index 99f74ec3a..e21176f05 100644
--- a/fpga/zsbl/gpt.c
+++ b/fpga/zsbl/gpt.c
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// gpt.c
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Code to read GPT Partitions off of an SD card.
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #include "gpt.h"
 #include "boot.h"
 #include "uart.h"
diff --git a/fpga/zsbl/gpt.h b/fpga/zsbl/gpt.h
index 5ce5e1d4b..8cd3ecc11 100644
--- a/fpga/zsbl/gpt.h
+++ b/fpga/zsbl/gpt.h
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// gpt.h
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Header for gpt.c, contains gpt structs
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #pragma once
 
 #include <stdint.h>
diff --git a/fpga/zsbl/riscv.S b/fpga/zsbl/riscv.S
index 7f400b1b2..b2d86599c 100644
--- a/fpga/zsbl/riscv.S
+++ b/fpga/zsbl/riscv.S
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// riscv.S
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Basic utility functions for reading registers
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 .section .text
 .globl read_mcycle
 .type read_mcycle, @function
diff --git a/fpga/zsbl/riscv.h b/fpga/zsbl/riscv.h
index a27cd48d6..543fe5cde 100644
--- a/fpga/zsbl/riscv.h
+++ b/fpga/zsbl/riscv.h
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// riscv.h
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Function prototypes for riscv utility functions
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #pragma once
 #include <stdint.h>
 
diff --git a/fpga/zsbl/sd.c b/fpga/zsbl/sd.c
index 484fd65c0..1f95d8477 100644
--- a/fpga/zsbl/sd.c
+++ b/fpga/zsbl/sd.c
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// sd.c
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: SD Card protocol functions
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #include "sd.h"
 #include "spi.h"
 #include "uart.h"
diff --git a/fpga/zsbl/sd.h b/fpga/zsbl/sd.h
index f695b83e5..f66686560 100644
--- a/fpga/zsbl/sd.h
+++ b/fpga/zsbl/sd.h
@@ -1,3 +1,33 @@
+///////////////////////////////////////////////////////////////////////
+// sd.h
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Header file for SD card protocol functions. Defines some
+//          useful macros.
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #pragma once
 
 #include <stdint.h>
diff --git a/fpga/zsbl/spi.c b/fpga/zsbl/spi.c
index 5b23c85b6..04d609648 100644
--- a/fpga/zsbl/spi.c
+++ b/fpga/zsbl/spi.c
@@ -29,31 +29,6 @@
 
 #include "spi.h"
 
-// Write to a register
-/* inline void write_reg(uintptr_t addr, uint32_t value) { */
-/*   volatile uint32_t * loc = (volatile uint32_t *) addr; */
-/*   *loc = value; */
-/* } */
-
-/* // Read a register */
-/* inline uint32_t read_reg(uintptr_t addr) { */
-/*   return *(volatile uint32_t *) addr; */
-/* } */
-
-/* // Queues a single byte in the transfer fifo */
-/* inline void spi_sendbyte(uint8_t byte) { */
-/*   // Write byte to transfer fifo */
-/*   write_reg(SPI_TXDATA, byte); */
-/* } */
-
-/* inline void waittx() { */
-/*   while(!(read_reg(SPI_IP) & 1)) {} */
-/* } */
-
-/* inline void waitrx() { */
-/*   while(read_reg(SPI_IP) & 2) {} */
-/* } */
-
 uint8_t spi_txrx(uint8_t byte) {
   spi_sendbyte(byte);
   waittx();
@@ -64,10 +39,6 @@ uint8_t spi_dummy() {
   return spi_txrx(0xff);
 }
 
-/* inline uint8_t spi_readbyte() { */
-/*   return read_reg(SPI_RXDATA); */
-/* } */
-
 uint64_t spi_read64() {
   uint64_t r;
   uint8_t rbyte;
diff --git a/fpga/zsbl/time.c b/fpga/zsbl/time.c
index 43ac085b7..c265eea05 100644
--- a/fpga/zsbl/time.c
+++ b/fpga/zsbl/time.c
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// time.c
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Gets and prints the current time.
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #include "time.h"
 #include "boot.h"
 #include "riscv.h"
diff --git a/fpga/zsbl/time.h b/fpga/zsbl/time.h
index 6cd928b88..8bf7064af 100644
--- a/fpga/zsbl/time.h
+++ b/fpga/zsbl/time.h
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// spi.c
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Time function prototypes
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #pragma once
 #include <stdint.h>
 
diff --git a/fpga/zsbl/uart.c b/fpga/zsbl/uart.c
index 8c25f17ca..580265d98 100644
--- a/fpga/zsbl/uart.c
+++ b/fpga/zsbl/uart.c
@@ -1,3 +1,33 @@
+///////////////////////////////////////////////////////////////////////
+// uart.c
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Uart printing functions, as well as functions for printing
+//          hex, decimal, and floating point numbers.
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #include "uart.h"
 
 void write_reg_u8(uintptr_t addr, uint8_t value)
diff --git a/fpga/zsbl/uart.h b/fpga/zsbl/uart.h
index cbdcc5941..96c55ffe8 100644
--- a/fpga/zsbl/uart.h
+++ b/fpga/zsbl/uart.h
@@ -1,3 +1,32 @@
+///////////////////////////////////////////////////////////////////////
+// uart.h
+//
+// Written: Jaocb Pease jacob.pease@okstate.edu 7/22/2024
+//
+// Purpose: Header for the UART functions.
+//
+// 
+//
+// A component of the Wally configurable RISC-V project.
+// 
+// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the
+// “License”); you may not use this file except in compliance with the
+// License, or, at your option, the Apache License version 2.0. You
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work
+// distributed under the License is distributed on an “AS IS” BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License.
+///////////////////////////////////////////////////////////////////////
+
 #pragma once
 #include <stdint.h>
 #include "riscv.h"