At 08:12 AM 4/3/2013, Johnny Billquist wrote:
On 2013-04-03 14:03, Bob Supnik wrote:
PDP-8s by default came with ASR/KSR-33 teletypes, which were upper case
only (and the parity bit forced on). The default terminal option is
'KSR' to mimic that.
When DEC began building its own terminals, like the LA36 and VT52, they
offered upper and lower case. The '7b' option is there for that.
Note that if you SET TTI 7b, start OS/8 (at least the version I have),
and type dir instead of DIR, the command isn't recognized.
I know that works for me, but it might be an issue with mark parity
(which all old OS/8 software expects), or it might be an issue with
CCL, which comes in many flavors.
There's an OS/8 patch for KBM and CD to allow lower case input. It's
"LCSYS.BI" on the Diagnostic RK05 that Rick Moore built which is widely
distributed. UCSYS.BI restores the default operation.
-Rick
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