Search results

I've observed that the Macintosh Plus's memory mapping has many fragmented free segments after the RAM, totaling over 7.8MB. If I were to use two of the larger-looking segments to create 4MB of RAM, creating a mapping structure of 4MB + ROM & IO + 1MB + IO + 3MB, would the additional 1+3MB of...

I'd like to rebuild it (e.g., using an MCU or FPGA) to fix the IWM issue on MacPlus.Currently, all I can find is information about the Apple II's 343-0041-B, but not the complete communication protocol.Any help would be appreciated.

I am now troubled by the 4116 DRAM which is easily damaged and difficult to buy. I hope to use 62256 and other easily available SRAM to form at least one row of DRAM for Apple ii. Is there any solution?

Is it possible to generate the RA10 signal by some method, and do I need to consider the refresh issue? If this is possible, does the ROM need to be modified?

Pico-mac is an interesting project. I want to make it more realistic: after ejecting the disk in the system and manually replacing the SD card, it can automatically mount the disk (or trigger the loading by GPIO switch), just like changing the disk on a real mac 128k. I am not familiar with mac...

Hi everyone, thanks for this forum. I have a Macintosh Plus, the analog board (international version, works in 120V mode) is broken, I repaired it, and now I can see the floppy disk symbol when I boot it. The current problem is that the screen brightness is too high when cold start, and returns...