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Update README.md

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ken rector
2025-01-24 16:27:00 -08:00
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# Loading the BASIC source code into CP-V
## Loading the BASIC source code into CP-V
After booting the SimH sigma emulator into CP-V, connecting a terminal window via telnet, and logging in, it should be a simple matter of opening the file build_BA.TREK in a host system text editor, coopying its contents to the host system clipboard, and then selecting the CP-V terminal window and pasting the clipboard contents into the terminal. It may take a bit of time to empty the clipboard into the CP-V terminal window, so be patient. The file build_BA.TREK contains, in addition to the BASIC source code itself, a CP-V terminal command to start the BASIC interpreter (the first line of the build file) and then at the end of the build file the BASIC commands "SAVE OVER BA:TREK" followed by "SYSTEM" to save the BASIC code as a CP-V file in the logged-on user's directory and then return to the CP-V terminal command prompt ("!"). (Type "L" -- List -- to satisfy yourself that the BA:TREK file has indeed been created.)
@@ -11,12 +11,12 @@ In Linux, if you're using vim as your text editor, you must have a version that
In MacOS, the procedure should be pretty much the same as for Linux.
# Running the BASIC program
## Running the BASIC program
Just type "BASIC BA:TREK" at the CP-V terminal command prompt, and the game will start. The game itself doesn't seem to have a command to exit back to the BASIC prompt (">"), but typing "Ctrl ]" to get the "telnet>" prompt in the terminal window and then typing "send break" followed by a <return> will do so (typing "Esc F" will also do so).
# History
## History
In early 2016, almost 7 years before a fully-functional SimH-based Xerox Sigma emulator existed, a certain retrocomputing enthusiast, who had (in 2011) obtained a working copy of George Plue's DOS-based "Siggy" Sigma/CP-V emulator following its author's death (via Plue's colleague Keith Calkins, both formerly of Andrews University), decided he wanted to do "something useful" with the emulator. He had learned that the earliest version of what became the "Star Trek" text-based computer game had in fact been developed by its original author Mike Mayfield on a Sigma 7 ( https://en.wikipedia.org/wiki/Star_Trek_(1971_video_game) ), and that a subsequent port (by Mayfield himself, in 1972-73) to HP BASIC was at that time available on the Web (from Pete Turnbull's Star Trek Web site http://www.dunnington.u-net.com/public/startrek/ , which now only exists on the Wayback Machine).