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Firmware for Mac ROM SIMM programmer

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README.md

Description

This project is a bootloader and firmware for a Macintosh ROM SIMM programmer, along with control software for Mac OS X, Windows, and Linux. The ROM SIMM is compatible with the SE/30, IIx, IIcx, IIci, IIfx, and IIsi.

This particular repository contains the main firmware that runs on the programmer board. There are two variants of the firmware that are built from this source code:

The firmware for my original programmer, the Big Mess o' Wires programmer, and the CayMac Vintage revision 1 programmer. These programmers use the Atmel/Microchip AT90USB646/1286 AVR microcontroller. The current compiler version used with this version of the firmware is avr-gcc 4.8.2. Using a different version of gcc may result in worse performance due to some very tight optimizations performed on this project to decrease programming time.
The firmware for the CayMac Vintage ROMmate-2, which uses the Nuvoton M258KE3AE ARM Cortex-M23 microcontroller. The compiler that has been tested with this firmware is ARM GCC 6-2017-q1-update.

Downloads

Binary downloads can be found at the following links:

Repositories

The project is spread over a few repositories. Some of them have a wiki.

Repository	Repository location	Wiki location
Programmer Firmware (AVR microcontroller)	https://github.com/dougg3/mac-rom-simm-programmer	https://github.com/dougg3/mac-rom-simm-programmer/wiki
Bootloader (AVR microcontroller)	https://github.com/dougg3/mac-rom-simm-programmer.bootloader
Programmer Software (Windows/Mac/Linux)	https://github.com/dougg3/mac-rom-simm-programmer.software	none
Windows Driver (.inf file, not needed on Windows 10)	https://github.com/dougg3/mac-rom-simm-programmer.windriver	none
CAD for programmer, along with 2 MB and 8 MB SIMM PCBs	https://github.com/dougg3/mac-rom-simm-programmer.cad	none
Mac ROM patcher	https://github.com/jpluimers/macrompatcher/ (from https://code.google.com/p/macrompatcher)	none

Firmware compilation instructions

AT90USB646/AT90USB1286

This firmware is used on my original programmer, the BMOW programmer, and CayMac's original programmer.

As mentioned earlier, this is an AVR project that is currently optimized for avr-gcc 4.8.2. It can be built using either CMake or Eclipse with the AVR Eclipse plugin. To build with CMake, make sure avr-gcc is in your path, and then run:

mkdir build_avr
cd build_avr
cmake -DCMAKE_TOOLCHAIN_FILE=../toolchain-avr.cmake ..
make

M258KE3AE

This firmware is used on the CayMac ROMmate-2.

Tested with ARM GCC 6-2017-q1-update. To build with CMake, make sure arm-none-eabi-gcc is in your path, and then run:

mkdir build_arm
cd build_arm
cmake -DCMAKE_TOOLCHAIN_FILE=../toolchain-m258ke.cmake ..
make

Common information

The build processes described above will create a SIMMProgrammer.bin file that can be programmed to the board using the Windows/Mac/Linux software. You can also generate a combined firmware image containing both the AVR and ARM builds that automatically flashes the correct firmware based on the detected board when using software version 2.0 or newer:

cat build_avr/SIMMProgrammer.bin \
    <(echo -en "\xDB\x00\xDB\x01\xDB\x02\xDB\x03\xDB\x04\xDB\x05\xDB\x06\xDB\x07") \
    <(echo -en "\xDB\x08\xDB\x09\xDB\x0A\xDB\x0B\xDB\x0C\xDB\x0D\xDB\x0E\xDB\x0F") \
    <(echo -en "\xDB\xDB\xDB\xDB\xAA\xAA\xAA\xAA\xDB\xDB\xDB\xDB\x55\x55\x55\x55") \
    build_arm/SIMMProgrammer.bin \
    > SIMMProgrammerFirmware.bin

Videos

ROM SIMM

What	Where
IIci booting from ROM disk	https://www.youtube.com/watch?v=SEFcQRmYtBI
Mac IIci Modified (Slower) Startup Chime	https://www.youtube.com/watch?v=lyIIRtR3Aw0
Playing with IIci ROM - other death chimes	https://www.youtube.com/watch?v=mlmt1AealLo
Mac IIci with a newer Mac's startup chime	https://www.youtube.com/watch?v=bRJtMMYCf0E
Mac IIci with Super Mario Bros startup chime!	https://www.youtube.com/watch?v=omL7mx0zxvI
Mac IIci Mario Startup Chime Part 2 -- Long!	https://www.youtube.com/watch?v=Yen0omvBo2Y
Mac IIci - Another Custom Startup Chime	https://www.youtube.com/watch?v=1R4W3mApAio