Posts Tagged ‘ROM’

Two bits per transistor: high-density ROM in Intel’s 8087 floating point chip

Tuesday, October 2nd, 2018

Ken Shirriff has a great write-up about the multi-level ROM in Intel's 8087 floating point chip: The 8087 chip provided fast floating point arithmetic for the original IBM PC and became part of the x86 architecture used today. One unusual feature of the 8087 is it contained a multi-level ROM...

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Posted in reversed | No Comments »

Apple II ROM Dumper

Monday, December 21st, 2015

Quinn Dunki created an Apple II ROM tool project and posted a great write-up on digging into the ROM of her Apple IIc Plus: You may recall way back when I started my Apple II ROM Tool project, that I had intended to fix some bugs. That was the whole...

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Posted in hacks, repair | 2 Comments »

rompar: a tool to analyze masked ROMs

Thursday, July 18th, 2013

You may have seen those highly magnified photos of decapped chips displaying the hardware architecture and wondered what information is represented by the solder-like designs. Adam "Major Malfunction" Laurie of Aperature Labs has developed a software tool to assist in deciphering the bits represented in these highly magnified chip photos....

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Posted in Chips, open source, reversed, tools | 1 Comment »

ChameleonOS open source Android ROM

Tuesday, April 9th, 2013

The ChameleonOS dev group has posted the latest version of their open source ROMS for Android devices. They describe: Chameleon OS (or ChaOS for short) is a custom Android ROM that gives the user more control than they can experience on any other Android ROM. Starting with a CyanogenMOD base,...

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Posted in Android, code, open source | 1 Comment »

Ghosts in the ROM

Thursday, August 30th, 2012

Ghosts in the ROM: While digging through dumps generated from the Apple Mac SE ROM images we noticed that there was a large amount of non-code, non-audio data. Adam Mayer tested different stride widths and found that at 67 bytes (536 pixels across) there appeared to be some sort of...

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Posted in Uncategorized | No Comments »

SNES FLASH/ROM runs custom Super Nintendo code

Saturday, June 16th, 2012

dext0rb from The Electrified Fooling Machine Company has just finished work on a project which allows custom Super Nintendo code to run on an SNES FLASH/ROM. He writes, "I wanted to make and play an updated version of NBA JAM an SNES hardware, so I made this device. Load a...

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Posted in Development, hacks, open source | 1 Comment »

Logic Sniffer upgrade v2.1 released

Tuesday, June 22nd, 2010

Package v2.1 is the first official upgrade release for the Logic Sniffer. Download it now at the Gadget Factory. This version has a lot of updates that should fix a bunch of problems in the initial release: FPGA bitstream v2.1 with high-speed SPI connection between the PIC and FPGA. This...

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Posted in firmware, logic analyzer | 7 Comments »

Logic Sniffer FPGA bitstream/ROM update

Thursday, May 20th, 2010

This is an old version, see the latest version on the documentation wiki. The Logic Sniffer stores the FPGA (IC3) bitstream in a flash ROM chip (IC2). The PIC microcontroller (IC1) can update the bitstream from a computer using the multi-platform pump-loader application. This feature lets us release FPGA design...

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Posted in logic analyzer | 4 Comments »

Bus Blaster: High speed USB to JTAG, SPI, UART

Thursday, March 25th, 2010

The Bus Pirate can program flash chips with flashrom and debug JTAG devices with OpenOCD, but it doesn't do these things very fast. It was designed for human-speed interaction. The Bus Pirate is a good way to learn an EEPROM chip, but you eventually integrate the chip in a real...

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Posted in Bus Blaster, JTAG | 15 Comments »

Flashrom release

Thursday, February 18th, 2010

ROM programmers and motherboard hackers will be happy to know that there's a new release of Flashrom for Windows, ported by pgeorgi and posted informally in the forum. Flashrom is an open source utility for working with flash storage chips. It supports a bunch of flash chips commonly used on...

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Posted in Bus Pirate | No Comments »

Demo: AT45DB041D 4Mbit SPI flash memory

Monday, January 25th, 2010

This is an old version, see the latest version on the documentation wiki. This demo is what the Bus Pirate is all about. A AT45DB041D 4Mbit flash memory stores the FPGA design on the open source logic analyzer project currently known as SUMP PUMP. We've worked with EEPROMs in the...

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Posted in Bus Pirate, demonstrations | No Comments »

Bus Pirate ROM programmer GUI

Monday, October 26th, 2009

audiohacked wrote a cross-platform ROM programmer GUI for the Bus Pirate after seeing James' Windows EEPROM programmer in C. Check out the development here, here, and here.

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Posted in binmode, Bus Pirate, scripts | 2 Comments »

Recent Comments

  • Joe Desbonnet: Ya, I can recommend the low melting point solder. I used brand 'ChipQuik' and it's amazingly easy to use.
  • Jerome: I need a new BusPirate for the Fablab ;) Many thanks!
  • Max: Seems like an unexpectedly violent way to remove the chip indeed. A hot air station should of course do the job just fine, but in...
  • jose: Part removal described here is pure butchery, the cheapest hot air station will do a fast and clean job removing the QFP, heat air to...
  • Cody: Yes please