RetroRetrospective – Fun today with yesterday’s gear……..
Posts Tagged ‘BASIC’

  Yes, you read that correctly – AppleWin for the Mac.  Well, not quite.  It is the same current release of AppleWin for Windows users, what I’ve done is use WineBottler to package up the download into a self contained app that uses Wine to provide the Windows API support. If you don’t want to compile Wine yourself, there are pre-compiled Wine installers on the WineBottler download page. So, why would I want to do this on my MacPro? That’s a very good question.  Most of the time I use Virtual ][ to emulate an Apple][, but when rebuilding my development environment to the MacPro I could find my license key, and as I was doing clean installs of my software that became a bit of a problem, so I’ve emailed and asked if it would be possible to retrieve my license keys (fingers crossed that comes through), but back to this story.

Way back in the day on of my favourite programming tools was Nibble BASIC from the Nibble Magazine.  It allowed you to write Applesoft programs without line numbers, and added additional commands such as If/ElseIf/Else, and Loop/EndLoop, as well as Goto and Gosub labels rather than using line numbers. I added extra commands such as Repeat/Until and While/EndWhile, and “Turtle” like graphic commands. In a previous RetroChallenge I was going to re-write Nibble BASIC in itself, but my project this time is to write an external “compiler” to take an enhanced Applesoft like script and convert it to run on an Apple][. My target script is a version of the traditional “Hello World” program below: # RetroChallenge 2016/10 # Hello World Program my String$  = “Hello World” my Counter% = 10 my Count%   = 1 my Co%      = 2 my Characters_Per_Line = 40 home for i = 1 to Counter%    Co% = centre_text(Characters_Per_line,String$) next  Print “String$ [“;String$;”]” PRINT “Counter%>”;Counter% ?     “Count%  >”;Count% print “Co%     >”;Co% sub centre_text    my line_size = shift    my text$     = shift    my start_character = int(len(text$)/2))    htab start_character : print text$ return(start_character) So, in a nutshell, declared variables with full name support, not just up to the first two characters, called subroutines passing and returning  values (no recursion support) , and case insensitive commands. If time permits, I’ll add additional Applesoft commands to the parser.

OK, so it’s summer here in Australia, so what is this “Winter Warmup” thing.  2014WW is the Retrochallenge and to quote the site: “In a nutshell, the RetroChallenge is a loosely disorganised gathering of RetroComputing enthusiasts who collectively do stuff with old computers for a month. The event is very much open to interpretation… individuals set there own challenges, which can range from programming to multimedia work; hardware restoration to exploring legacy networking… or just plain dicking around. It really doesn’t matter what you do, just so long as you do it. While the RetroChallenge has its competitive side, it’s not really a contest… it’s more like global thermonuclear war — everyone can play, but nobody really wins.”