Faster than Atlas?
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Bernd Oppolzer <[email protected]> Sent: Sunday, November 15, 2020 5:43 PM To: [email protected] Subject: Re: Improve OMVS cp performance? Telefunken TR 4, designed 1958, first delivered in 1962. This predates IBM/360 by at least 4 years. The fastest mainframe built in Europe at that time. The internal code ("Zentralcode") was an 8-bit code using 256 characters. Word structure, a word had 48 bits plus 2 tag bits (tagged architecture) plus some parity bits, not seen by the programmer. Mostly used with ALGOL; the TR 4 was "a Hardware implementation of ALGOL" (quote from E.J. Dijkstra). A word could hold up to six characters, but some later languages (like Fortran) decided to store only 4 characters in one word, to be more compatible with IBM Fortran. Kind regards Bernd Am 15.11.2020 um 03:25 schrieb Mike Schwab: > You have to remember that S/360 was the first 8 bit computer. Prior > computers used 4 bits for a digit and 6 bits for a character. They > designed EBCDIC to be easily converted for use with existing 7 track > tape drives, printers, card and tape readers and punches. There was a > proposed ASCII code that was put on documentation but dropped for the > 370 virtual memory bit in the PSW. > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
