PLEX86  x86- Virtual Machine (VM) Program
 Plex86  |  CVS  |  Mailing List  |  Download  |  Computer Folklore

Thou shalt have no other gods before the ANSI C standard 1358


VPN Service Provider

and for total topic drift ... when we were doing the terminal controller clone using interdata-3

Thou shalt have no other gods before the ANSI C standard 1359
No, in fact earlier VT terminals (VT-52 for example) had a specific terminal ID...

for doing both terminal type identification and terminal speed determination ... our first transfer of data to mainframe memory appeared to be totally garbeled.

terms out that the line-scanners in the official terminal controller placed the leading arriving bit in the low-order bit position (in a byte) ... so that ascii data was arriving in mainframe memory bit-reversed within a byte. The official ascii terminal translate tables were then handling the bit-reversed bytes when doing

we initially overlooked that when first transfer of incoming ascii data into mainframe memory ... placing leading bit in high-order bit position (within a byte). we quickly diagnosed the problem and fixed the interdata-3 so that it transferred the ascii bytes to mainframe memory in bit-reversed format.

now much later ... mainframes would have two kinds of ascii translate tables ... one for use with terminal controllers where the line-scanners did bit-reversal of ascii bytes ... and another for use with various kinds of things like LAN interfaces that transferred bytes in non-bit-reversed byte format (regardless of the coding type).

--

Thou shalt have no other gods before the ANSI C standard 1360
rpl There is no simple answer. The basic principle is that computers process data as...


List | Previous | Next

Thou shalt have no other gods before the ANSI C standard 1359

Alt Folklore Computers Newsgroups

Thou shalt have no other gods before the ANSI C standard 1357