Editing Convergent Technologies (section)

===MegaFrame===
Available in August 1983,<ref>{{cite web |title=Grows from 8 to 128 users in the field |url=http://www.1000bit.it/ad/bro/convergent/Convergent-Tech-PR-MegaFrame.pdf |publisher=Convergent Technologies}}</ref> the MegaFrame (S/1280) consisted of up to eight 10&nbsp;MHz Motorola 68010-based "Application Processors" running [[UNIX System III]]-derived CTIX talking to 8&nbsp;MHz [[Intel 80186]]-based I/O processor boards each running their own scaled-down versions of CTOS: File Processor ("fpCTOS"), Cluster Processor ("cpCTOS"), Terminal Processor ("tpCTOS"), and [[Storage Module Device|SMD]]/Storage Processor ("spCTOS"). Each processor had its own RAM: 512 KB to 4 MB for the Application Processors, and 256 KB to 768 KB for the I/O processors. Up to 36 boards could be installed in a system: six in the base enclosure, with another six per expansion enclosure (five expansion enclosures maximum).<ref>{{cite book |title=MegaFrame Product Overview |date=January 24, 1985 |publisher=Convergent Technologies |url=http://www.bitsavers.org/pdf/convergent/68K/megaframe/B-02-00129-00_MegaFame_Product_Overview_Jan85.pdf}}</ref> Each File Processor could support up to four disks.

The MegaFrame was resold by Burroughs/Unisys as the XE550 running CENTIX and BTOS, and originally sold as the XE500 and XE520 without the Application Processors. Motorola/Four-Phase resold the MegaFrame as the System 6600.