On 3 December 2014 at 00:27, Robert A. Rosenberg <[email protected]> wrote: >> >> https://archive.org/details/bitsavers_ibm360refeystem360ReferenceData_662124 >> ibm :: 360 :: referenceCard :: GX20-1703-9 System360 Reference Data > > > Unfortunately, as others have noted, this for IBM360 model 30 and above. The > IBM360 Model 20 had a similar but much smaller and incompatible instruction > set.
However Bitsavers does have the IBM System/360 Model 20 Functional Characteristics book, A26-5847-3, which while it is not a reference card, does contain the complete description of both the instruction set architecture and the 360/20's unique I/O architecture for the supported devices. The whole thing is 135 pages. Tony H.
