I believe built in, internal 10MB/s ”Narrow (8bit) Fast” SCSI first showed up on the Power Macintosh 7100 & 8100. The 7300, 7500, 7600, 8500, 8600, 9500 & 9600 are the other later models with it before they switched to IDE with the intro of G3 models. PPC Macs with built in IDE for their hard...