Shared Projects by Tobrew

This is a project for a digital DVI/HDMI Apple II video card. It directly produces a digital video stream from Apple II’s memory content. The signal is output via an HDMI connector, connecting the Apple II to modern displays with HDMI (or DVI) inputs. No more analog signal conversion required. If using with an Apple IIgs it will only work when using native Apple II graphics modes.

The project is a collaboration with Thorsten Brehm. His related firmware project is here: https://github.com/ThorstenBr/A2DVI-Firmware

This is the ONLY the HDMI break out board for the A2DVI card. However, you can buy a pre-made from Digikey. Here->https://tinyurl.com/3hh769ey

This is a project for a digital DVI/HDMI Apple II video card. It directly produces a digital video stream from Apple II’s memory content. The signal is output via an HDMI connector, connecting the Apple II to modern displays with HDMI (or DVI) inputs. No more analog signal conversion required. If using with an Apple IIgs it will only work when using native Apple II graphics modes.

The project is a collaboration with Thorsten Brehm. His related firmware project is here: https://github.com/ThorstenBr/A2DVI-Firmware For the DVI output to be active, the new firmware developed by Thorsten should be used.

You will also need the A2DVI HDMI break out board (https://oshpark.com/shared_projects/qDqVejj3) or you can buy a pre-made one from Digikey. Here->https://tinyurl.com/3hh769ey

Expansion card that adds an MC68882 FPU to your Macintosh Classic II. The board has two layers to keep the PCB cost down. It offers a switchable clock source between the system clock (16 MHz, synchronous operation) and a crystal oscillator on the board (20,32, or 40 MHz, asynchronous operation depending on your crystal and FPU chip. If you just want a stock 16MHz FPU, leave off the oscillator and use a MC68882FN16A chip). If you want to overclock, use a faster FPU chip such as a MC68882FN40A, and the appropriate oscillator. It has been shown that the FPU can be overclocked up to 40MHz, but based on experience, keeping it around 25-33MHz maintains better CPU performance.

I added a pad for an optional 1206 LED and a spot for a 200ohm resistor.

Project by Marcin Dymczyk, Modifications by me

This is intended to slot in vertically into a 1/2AA battery holder seen on many Macintosh computers for the PRAM battery. It will allow the use of the less expensive, easier to find and less leaky CR2032 coin batteries. Uses BAT-HLD-001-THM battery holder from Mouser.

Turn a Maclock (a simple alarm clock inside a shockingly accurate miniature Macintosh shell) into a working Mac using a Raspberry Pi Zero. Buttons, brightness, sound, and battery all work.

The board is tested and works.