Talk:Readline interface: Difference between revisions

:: ''History'' shouldn't be limited to the ''up arrow'' key. On earlier VM/CMS systems, system programmers (almost everywhere) added a ROY (by way of a modification to the VM control program [CP]) implementation [of the latter-named RETREIVE function] to the '''SysReq''' key (so as to not preclude taking over any "useful" key), but--- there weren't any ''arrow'' keys at that time. But the '''SysReq''' key was later perloinedpurloined by VTAM, but by that time, IBM VM/CMS system had implemented the RETRIEVE function to any PFK (program function key) that the user choose, and it was later assigned by some programs to PF6/PF18 such as XEDIT and others, so most users choose that key which made it easier to remember which key to use that key everywhere for retrieving commands. Nowadays, it seems almost silly to even discuss the usefullness of it, but at one time, there was no such animal. Even much much later, DOS seemed to add it as an afterthought. -- [[User:Gerard Schildberger|Gerard Schildberger]] 17:32, 1 June 2012 (UTC)