BASIC (Was: Reading HP2000 tapes
Guy Sotomayor Jr
ggs at shiresoft.com
Tue Jul 17 15:21:13 CDT 2018
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 <cctalk at classiccmp.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!?!?
>> And the tokens are not the same between different brand implementations, or even between different versions, such as MBASIC 4 and MBASIC 5.
> 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:
> - John
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