Posts in 2022
  • Typewriter Teletype

    Sunday, August 07, 2022 in Hacks

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    What is it? Samsung / Commodore SQ-1000 electronic typewriters can be modified to work as a teletype terminal. They use a simple 8bit microcontroller to scan the keyboard matrix and do the printing itself. The keyboard was originally attached using …

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Posts in 2021
  • ATAPI Audio-CD player

    Monday, July 26, 2021 in Hacks

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    What is it? ATAPIMega is a hardware project which allows regular (P)ATA CD/DVD drives to be used as a standalone Audio-CD player. The PCB accepts (regulated!) 12V DC power via a 5.5mm/2.1mm barrel jack and outputs 12V/5V for the CD drive. The …

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  • TCP/IP for Casio calculators

    Monday, July 12, 2021 in Hacks

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    What is it? fxIP is a port of uIP 1.0 to Casio fx-9750/fx-9860 calculators. It requires calculators with a SuperH SH4a CPU, needs quite a bit of SRAM. fxIP connects to IP networks via SLIP encapsulation over the 3-pin 2.5mm 5V serial port/UART. …

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Posts in 2020
  • Programmable logic in PHP

    Sunday, November 08, 2020 in Hacks

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    What is it? Parallel ROMs (OTP-ROMs, EPROMs, EEPROMs, NOR flash, etc.) can be used as simple, programmable logic devices. They can be programmed to hold a lookup-table / bit stream, which will emulate logic functions (like 74-series logic) by …

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  • GPIO PATA/IDE on Linux

    Saturday, August 08, 2020 in Hacks

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    What is it? pata-gpio is a Linux kernel driver for GPIO bitbanged PATA (also known as ATA/ATAPI or IDE). Pin configuration can be set via device tree, the regular ATA framework is used. IDE Primary/Secondary device support is implemented. In use …

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