Content deleted Content added
Guy Harris (talk | contribs) →96K upgrade: Most people have names that aren't SHOUTED by default. Either go for it and infer from the author's email address that their name is Leonard Beares, not LEONARD BEARES, or don't speak of the author at all. |
Guy Harris (talk | contribs) →96K upgrade: Add, as a reference, an IBM manual that, according its entry in the IBM bibliography at http://www.bitsavers.org/pdf/ibm/360/bibliography/GA22-6822-21_System_360_and_System_370_Bibliography_Sep74.pdf, indicates that there are RPQs to allow expanding the memory on an M30 to 96k. |
||
Line 67:
===96K upgrade===
In response to competitive pressures, IBM introduced a memory upgrade option, allowing 96K on a 360/30.<ref>A posted submission to Ed Thelen's 360/30 writings (http://ed-thelen.org/comp-hist/ibm-360-30.html) from December 2005, labeled "Historical Note", indicated that, in response to a 128K offering by a small company, IBM actually introduced an upgrade, allowing 96K on a 360/30. The author noted that this allowed hour-plus tape/disk-based sorts to be done in-core in minutes.</ref> It seems, based on the system's front panel, that a provision for supporting more than 64K had been pre-planned.<ref>http://www.ljw.me.uk/ibm360/links has an entry named '''Glenn's Computer Museum''' (http://www.glennsmuseum.com/ibm/ibm.html) that has the following annotation: note that this front panel has indicators for extra address bits to allow more than 64k main storage</ref><ref>{{cite book|title=IBM System/360 Model 30 Storage Expansion Feature Manual: RPQ's EA3807, EA1527; or RPQ's Y91283 and Y91325 (World Trade)|id=GA24-3564}}</ref>
==Microcode==
| |||