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      • Assy 250407 Rev. B
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      • Assy 250407 Rev. B #1
      • Assy 250407 Rev. B #2
      • Assy 250407 Rev. B #3
      • Assy 250407 Rev. B #4
      • Assy 250407 Rev. C #1
      • Assy 250425 Rev. A #1
      • Assy 250425 Rev. A #2
      • Assy 250425 Rev. A #3
      • Assy 250425 Rev. A #4
      • Assy 250425 Rev. B #1
    • Commodore 64C
      • Assy 250469 Rev. 3 #1
      • Assy 250469 Rev. 3 #2
      • Assy 250469 Rev. 4 #1
      • Assy 250469 Rev. 4 #2
      • Assy 250469 Rev. 4 #3
      • Assy 250469 Rev. 4 #4
      • Assy 250469 Rev. A #1
      • Assy 250469 Rev. A #2
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Assy 250425

More Electroware Power

August 31, 2020August 27, 2020 by MtnBuffalo

Giving just the right amount of electrical power to your Commodore 64’s is vital to ensure a stable operation. Voltage drops may give rise to stability issues while too much voltage will undoubtedly fry the delicate chips on the old C64 motherboards. The latter is … Read more

Categories C64 Breadbox, C64 C, C64 Games System, C64 Hardware, C64 Mods, C64 Peripherals, C64G
The MechBoard64. Cherry Locking switch. Mechanical keyboard. breadbox64.com

The MechBoard64

August 12, 2022July 29, 2018 by MtnBuffalo

It’s finally time to show what has been clutting up my workbench for way too long! Back in 2015 I got my hands on two C64 Reloaded boards (link) and installed them inside cases from the Kickstarter campaign (link). I also entered the Phase5 Indiegogo … Read more

Categories C64 Breadbox, C64 C, C64 Hardware, C64 Mods, C64 Peripherals, C64 Reloaded

Green Short Boards

January 18, 2019September 18, 2017 by MtnBuffalo

…and a yellow longboard have been added to my collection of Commodore 64 motherboards. The yellow Assy 250425 Revision B longboard is in really great shape. It has a MOS 8500 MPU which is quite unusual for the long boards. Normally they have MOS 6510 … Read more

Categories C64 Breadbox, C64 C, C64 Hardware

More C64 Repair Logs

August 29, 2017August 23, 2017 by MtnBuffalo

During the last couple of weeks I’ve received 8 (!) broken Commodore 64 machines that were in need of repair. The repair logs of three of them have already been described here (link), while the latter five had issues ranging from faulty Serial Ports (link, link, link), … Read more

Categories C64 Breadbox, C64 Hardware, C64 Repairs

Broken C64’s Repaired

August 15, 2017August 12, 2017 by MtnBuffalo

I just got this stack of broken and badly discolored Commodore 64C’s from a friend. The cases were made in China, Hong Kong and Germany… The first board is an Assy 250469 Rev. A board that had a broken keyboard – some of the keys … Read more

Categories C64 C, C64 Hardware, C64 Repairs
Commodore 64 blacj screen fix using third party PLA chip. Read the review on breadbox64.com

A Plethora of PLAs

July 5, 2018December 19, 2016 by MtnBuffalo

The most common cause of a black screen on the old Commodore 64 long boards (link) is a broken Programmed Logic Array (PLA) chip located at position U17. Based on different input signals, the PLA creates chip select signals and controls which chip is to … Read more

Categories C64 Breadbox, C64 Hardware, C64 Mods, C64 Repairs
Commodore 64 Project SIDFX sound mod. Swapping between SID chip files by flicking a switch. Read more on breadbox64.com

The SIDFX Sound Mod

December 20, 2017November 5, 2016 by MtnBuffalo

The semi analog SID chip (Sound Interface Device) is an electronic music synthesizer and its distinctive sounds are easily recognized by any Commodore 64 owner. Back in the days, most SID tunes ended up in games or demos to basically support the graphics on the … Read more

Categories C64 Hardware, C64 Mods, C64 Music
Switchless Reset Mod. Arduino Pro Mini used for doing warm and cold resets withour the need to drill a hole in the cabinet. Read the review and retrieve the Arduino code on breadbox64.com

Switchless Reset Mod

December 20, 2017July 3, 2016 by MtnBuffalo

Turning the Commodore 64 off and on every time it needs to be reset, may eventually cause the power switch to malfunction or even put unnecessary stress on the fragile chips. Because of this, people have been installing reset switches for years using a momentary … Read more

Categories C64 Breadbox, C64 C, C64 Hardware, C64 Mods
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