A1200 Rev 1B & A600 Rev 2B – Audio too loud

If the audio of your Amiga 1200 Rev 1B, A600 Rev 2B or maybe other revisions is too loud (not distorted), that is caused by two resistors. Tristan Zondag confirmed the A600 Rev 2B is also affected. R331 & R321 are 1,5K Ohm, while they should be 680 Ohm. If I test the output voltage […]

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Amiga 500,500+,2000,3000 drive selector switch

How does it work On the Amiga 500,500+,2000,3000 you can’t boot from the external (DF1) drive by default, so you need a switch so the external (DF1) drive will act as DF0: Switch position 1 (default) Internal Drive is DF0: External Drive is DF1: Switch position 2 External Drive will be acting as DF0: Internal […]

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Compact Flash LED not working

Some Compact Flash (CF) to IDE adaptors fail to light up the drive activity LED, I was wondering why… I took a board and removed some components and did some measurements, and I  discovered that the BOTH base pins of the NPN transistors are connected to ground. Huh?! That means that the transistors won’t switch […]

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