Ref: Your note of Tue, 14 Jan 2014 14:55:55 -0700 Constants with type CA are currently translated from EBCDIC codepage 037 to the 7-bit displayable ASCII codes hex 20 through 7E, not to code page 819. Anything which does not translate to a valid ASCII character in that range is left untranslated.
(The 7E tilde character was missing until quite recently, which I spotted and fixed when testing the changes for PM75317, which was mainly to ensure that the HLASM source code could be stored in a UTF-8 repository if necessary). I do not know why this scheme was chosen historically. It does seem rather US-centric to me. The ASMALTAS table used for TRANSLATE(AS) converts code page 037 to code page 819 (ISO 8859-1), using a full 256-byte mapping. Jonathan Scott
