[Simh] PDP8, Adventure, and SIMH

[Rick Murphy]

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