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Microcontroller

Screenshot 2026-03-15 120544
Hardware Microcontroller Reverse-engineer Software Development Vintage Computing 

PIC32MZ Iomega ZIP100 Parallel Port Emulator [Part 2: LPT100 Hardware Design]

March 2, 2026March 17, 2026 ToughDev 0 Comment dosbox, iomega, PIC32MZ, qemu, zip100

A few months after successfully getting Super 8086 Box, DOSBox-X, and QEMU to emulate an Iomega ZIP100 parallel-port ZIP drive,

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Screenshot 2026-03-14 163415
General Programming Hardware Microcontroller Reverse-engineer Software Development Vintage Computing 

PIC32MZ Iomega ZIP100 Parallel Port Emulator [Part 1: DOSBox & QEMU Testing]

February 11, 2026March 16, 2026 ToughDev 2 Comments dosbox, iomega, PIC32MZ, qemu, zip100

In early 2023 my beloved Iomega ZIP100 parallel port drive started to randomly eject disks. I figured that the drive

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IMG_2157
General Programming Hardware Microcontroller Software Development Vintage Computing 

Exploring MSX-DOS and CP/M on OneChipBook FPGA-powered laptop

September 23, 2025January 6, 2026 ToughDev 2 Comments cp/m, fpga, msx-dos, msx2, onechipbook, turbo pascal, z80

The OneChipBook, available on AliExpress for around $200, is a very interesting FPGA-powered laptop with 32MB RAM, a 10-inch 1024×768

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IMG_3405
General Programming Hardware Microcontroller Networking Vintage Computing 

Internet access from Pocket 386 retro laptop using Wemos D1 ESP8266 serial Wifi adapter

August 4, 2025December 8, 2025 ToughDev 5 Comments ESP8266, ms dos, pocket 386, serial, wifi

Although there is a USB port on the Pocket 386, I seldom use it for file transfer. The device driver,

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dsPIC memory organization
General Programming Hardware Microcontroller Popular Articles Radio/TV Software Development 

dsMP3, my LW/MW/FM/SW radio with MP3 recording/playback [Part 2 – Firmware Design]

July 19, 2023May 25, 2025 ToughDev 1 Comment ch375, ch376, dspic

UPDATE (May 2025) – Check out Hackaday’s write-up of the dsMP3 project here In my previous post I described how

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imageonline-co-straightend-image(1)
Hardware Microcontroller Popular Articles Radio/TV 

dsMP3, my LW/MW/FM/SW radio with MP3 recording/playback [Part 1 – Hardware Design]

May 15, 2023May 16, 2025 ToughDev 1 Comment ch375, ch376, dspic, rtc, si4735, tda1308

UPDATE (May 2025) – Check out Hackaday’s write-up of the dsMP3 project here Wondering why even high-end multiband radios such

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ch376_pinout
CodeProject Hardware Microcontroller 

Integrating FatFs FAT filesystem module with CH375/CH376 USB controller

April 25, 2023May 9, 2023 ToughDev 0 Comment ch375, ch376, dspic, fatfs, spi

In a recent embedded project, I need to access data stored on a USB thumb drive using a dsPIC33EP512MC502. As

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24c64
CodeProject General Programming Hardware Microcontroller 

Emulating EEPROM using flash memory on dsPIC33EP512MC502

January 17, 2023May 9, 2023 ToughDev 0 Comment dspic, eeprom, flash, mplab, pickit4, xc16

One thing I don’t like about the dsPICEE3P (and the PIC32MX) lines is that these devices do not have EEPROM

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time difference
CodeProject General Programming Hardware Microcontroller Software Development 

Software Real Time Clock (RTC) for the dsPIC33EP512MC502

March 15, 2021April 4, 2023 ToughDev 0 Comment dspic, rtc

Although the dsPIC33EP512MC502 does not have an integrated Real Time Clock (RTC) for time keeping, this can easily be overcome by configuring

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Microchip DS70211 wrong FVCO formula
CodeProject Hardware Microcontroller 

16-bit stereo audio DAC on dsPIC33FJ128GP802

February 19, 2021April 4, 2023 ToughDev 0 Comment dac, dspic

The dsPIC33FJ128GP802 is among the few devices in the dsPIC33F family that have an integrated 16-bit stereo DAC module. The DAC can be

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dsPIC CTMU
CodeProject Hardware Microcontroller 

Measuring temperature using the dsPIC Charge Time Measurement Unit (CTMU)

January 8, 2021April 6, 2023 ToughDev 0 Comment ctmu, dht11, dspic

In an attempt to save an I/O pin originally used for the DHT11 to measure ambient temperature in one of my

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ida_int13h
CodeProject Hardware Microcontroller Vintage Computing 

USB flash drives on 8-bit ISA bus using CH375 ISA to USB adapter

April 29, 2018November 8, 2024 ToughDev bios, ch375, ida pro, isa to usb, ms dos

I purchased the CH375 ISA to USB adapter from Taobao, hoping for an easier way to transfer files to my

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mplab-2Bmemory-2Bmodel
CodeProject Hardware Microcontroller Popular Articles Speech Useful Projects 

English text to speech on a PIC microcontroller

September 22, 2014May 9, 2023 ToughDev 5 Comments

I have always been a fan of the TTS256 – a tiny but great English text-to-speech IC based on a

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Board-2BFront
Hardware Microcontroller Speech Useful Projects 

LD3320 Chinese Speech Recognition and MP3 Player Module

August 27, 2014May 4, 2023 ToughDev 17 Comments

UPDATED (March 2018): A better English version of the datasheet can be found here.   After my previous success in getting

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KGrHqV-qsFH2y-O4fYBSFLtYvsRg-60_57
Hardware Microcontroller Speech 

SYN6288 Chinese Speech Synthesis Module

July 18, 2014May 7, 2023 ToughDev 5 Comments

When searching eBay for a text to speech IC equivalent to the TTS256, I came across the SYN6288, a cheap

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About ToughDev

Since 2008, ToughDev has explored embedded systems, software development, reverse engineering, and retro computing, bridging legacy hardware with modern software.

Recent projects include the Super 8086 Box PC XT emulator, the dsMP3 embedded radio, and detailed teardowns of vintage PCs such as the Tandy 2500RSX.

Beyond publishing technical research, ToughDev also provides consulting and custom development services in embedded systems, mobile applications, VoIP, microcontroller firmware, and integration with vintage or undocumented hardware platforms.

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Recent Comments

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  • ToughDev on Compaq Contura 3/25C 80386 Laptop
  • ToughDev on Internet access from Pocket 386 retro laptop using Wemos D1 ESP8266 serial Wifi adapter
  • Jan de Lange on Compaq Contura 3/25C 80386 Laptop
  • Jan de Lange on Internet access from Pocket 386 retro laptop using Wemos D1 ESP8266 serial Wifi adapter
  • ToughDev on Internet access from Pocket 386 retro laptop using Wemos D1 ESP8266 serial Wifi adapter
  • Jan de Lange on Internet access from Pocket 386 retro laptop using Wemos D1 ESP8266 serial Wifi adapter
  • SafeeDeen on dsMP3, my LW/MW/FM/SW radio with MP3 recording/playback [Part 1 – Hardware Design]
  • Dr. Sanjeev Saxena on dsMP3, my LW/MW/FM/SW radio with MP3 recording/playback [Part 2 – Firmware Design]
  • Nguyen Hoang on Configuring a modern laser printer to work with DOS, Windows 3.1 and Windows NT 3.51
  • ToughDev on Exploring MSX-DOS and CP/M on OneChipBook FPGA-powered laptop
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  • ToughDev on Repairing a failed Tecsun S-8800 radio due to damaged charging board
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  • ToughDev on PIC32MZ Iomega ZIP100 Parallel Port Emulator [Part 1: DOSBox & QEMU Testing]
  • Andrey on PIC32MZ Iomega ZIP100 Parallel Port Emulator [Part 1: DOSBox & QEMU Testing]
  • MIDImusician on Super 8086 Box, my home-built PC XT emulator with Adlib, MPU-401, joystick and NE2000 support
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