Editing Macintosh Performa 636CD (section)

== Configuration ==
Apple's ''Macintosh Performa 630 Series'' Service Source names the 636 but not the 636CD, and gives no configuration for it; its specifications, symptom charts and procedures cover the whole series.<ref name="ss" /> EveryMac gives the 636CD 8 MB of RAM, a 500 MB hard drive and an external 14.4k modem, without a monitor, at US$1,400 (order number M3402LL/A), and Low End Mac also describes it without a display.<ref name="everymac">{{cite web |url=https://everymac.com/systems/apple/mac_performa/specs/mac_performa_636cd.html |title=Apple Macintosh Performa 636 (CD) Specs |publisher=EveryMac |access-date=2026-09-30}} Covers the 636 and 636CD: 8 MB; 500 MB IDE; 2X CD-ROM on the 636CD; 14.4k external modem; identical to the 635CD but with more RAM and a larger hard drive, without the 15-inch monitor; introduced 18 July 1994, discontinued 1 July 1995; order number M3402LL/A; US$1,400.</ref><ref name="lem">{{cite web |url=https://lowendmac.com/1994/performa-630/ |title=Performa 630 and LC 630 |publisher=Low End Mac |access-date=2026-09-30}} Model list: 635CD same as 630CD with 5 MB, bundled with modem and display; 636 same as 635CD but no CD-ROM or display, 8 MB; 636CD same as 636 with CD-ROM, higher education only; 637CD same as 636CD bundled with display, higher education only; 638CD same as 637CD without display, includes TV tuner/video input card; 638CD/V same as 638CD with TV tuner and multiscan display. PRAM battery 4.5 V alkaline. The IDE controller supports a single device; Macs with IDE drives do not supply SCSI termination power.</ref>

The CD-ROM drive is a SCSI device, set to SCSI ID 3 at the factory, although the hard drive is IDE.<ref name="ss" />