The HP9830 (1972) with it's ROM'ed BASIC works this way. LIST produces a 'cleaned up' version of the source code.
On 2018-Jul-17, at 1:21 PM, Guy Sotomayor Jr via cctalk wrote: > I should also mention that for the IBM S/23, once the BASIC program is > entered, the original > source is discarded and only the tokenized code remains (comments are > retained as-is). The > LIST command runs a de-tokenizer and reconstructs the original source (well > close to it anyway). > > TTFN - Guy > >> On Jul 17, 2018, at 12:33 PM, John Foust via cctalk <firstname.lastname@example.org> >> wrote: >> >> At 03:53 PM 7/14/2018, Fred Cisin via cctalk wrote: >>> On Sat, 14 Jul 2018, Ed Sharpe via cctalk wrote: >>>> isn't theÂ basicÂ programsÂ also stored in tokinizedÂ forms!?!? >>> >>> Yes. >>> And the tokens are not the same between different brand implementations, or >>> even between different versions, such as MBASIC 4 and MBASIC 5. >>> http://fileformats.archiveteam.org/wiki/Tokenized_BASIC >> >> I remember a detokenizer for RSTS BASIC-PLUS that's not on that list. >> >> I think it was called a "decompiler" though. Seemed like magic at the time. >> >> Googling reveals "You may be remembering the BASIC PLUS >> decompiler under RSTS. RSTS BASIC PLUS was interpreted from "push-pop" code. >> The symbol table was available in the compiled file, and the correspondence >> between push-pop operations and BASIC PLUS source was very close, so you >> could get back very reasonable code." >> >> And our previous discussion of it a decade ago: >> >> https://marc.info/?l=classiccmp&m=121804804023540&w=2 >> >> - John >> >