Understanding the MCPX Boot ROM: The Hidden Firmware of PowerPC Macs
If you are digging into retro Mac hardware, specifically the Power Macintosh 6100/7100/8100 series (and some early PCI PowerMacs), you will eventually run into the acronym . Here’s what you need to know about its Boot ROM. What is the MCPX? The MCPX (often labeled McP-X or Grand Central ) is an ASIC (Application-Specific Integrated Circuit) that acts as the memory controller and I/O controller on early PowerPC Macs. Crucially, it contains the machine’s primary Boot ROM . mcpx boot rom