<story><title>How Apple&apos;s developers reflashed Mac ROMs in the &apos;90s</title><url>https://www.downtowndougbrown.com/2023/11/how-apples-developers-reflashed-mac-roms-in-the-90s/</url></story><parent_chain></parent_chain><comment><author>koz1000</author><text>I was working on an 8-bit system back in this same time period. We couldn&amp;#x27;t afford flash devices and the kit required to reprogram them. But we did a similar trick with an extra write pin located near the ROM socket, then used a special daughterboard filled with SRAM that replaced the ROM and also touched the write line. Now we could just use our cheap debugger and blow an image into the address space the ROM used.&lt;p&gt;Only downside was that you lost the image on power down, so I can see why EEPROM was more important to Apple in developing their systems.</text></comment>
<story><title>How Apple&apos;s developers reflashed Mac ROMs in the &apos;90s</title><url>https://www.downtowndougbrown.com/2023/11/how-apples-developers-reflashed-mac-roms-in-the-90s/</url></story><parent_chain></parent_chain><comment><author>JKCalhoun</author><text>&amp;gt; I would love to see an example of what these PDS cards looked like, if anyone out there has some inside knowledge they would be willing to share!&lt;p&gt;The only thing that came to mind were these Newton development boards from about that era. I believe they were more or less Newtons shoved into one of the slots of a Quadra-like machine (perhaps the PDS slot?).&lt;p&gt;My memory of that era is fuzzy though.</text></comment>