Message-ID: <01FD6EC775C6D4119CDF0090273F74A4021FC6@emwatent02.meters.com.au> From: "da Silva, Joe" To: "'opendos AT delorie DOT com'" Subject: RE: Text file format .ASC ? (#1.1) Date: Fri, 9 Mar 2001 13:06:39 +1100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2448.0) Content-Type: text/plain; charset="koi8-r" Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id WAA29891 Reply-To: opendos AT delorie DOT com Wow! Thanks for that, Arkady! Well, it looks like Uncle Murphey (sp?) has struck again! In your Cyrillic text below, the 'm' is still an 'm', so perhaps the only clue I had about the character coding was a "typo"!!! :-/ Anyway, one last thing - what code page should be used for this file? Eg. 855, 866, or something else? Regards, Joe. > -----Original Message----- > From: Arkady V.Belousov [SMTP:ark AT belous DOT munic DOT msk DOT su] > Sent: Thursday, 8 March 2001 22:23 > To: opendos AT delorie DOT com > Subject: RE: Text file format .ASC ? (#1) > > X-Comment-To: da Silva, Joe > > Hi! > > 8-Мар-2001 11:31 Joe DOT daSilva AT emailmetering DOT com (da Silva, Joe) wrote to > "'opendos AT delorie DOT com'" : > > dJ> To answer your last question first, I know the 'm' is representing > dJ> either the Roman letter 'u' or the Greek letter "mu", because the > dJ> text is clearly referring to the NEC switch-mode chip 'uPC494C'. > dJ> Although the first letter of this chip number is usually shown as > dJ> 'u', I think the "proper" letter is the Greek letter "mu", similar to > dJ> chip numbers such as 'uA741' (ex-Fairchild) ... > dJ> As far as the algorithm or program used - I have no idea. I'm looking > dJ> for clues about this ... After I know what this text format is, my > next > dJ> task will be to find a suitable program, with which to either display > dJ> or convert this text. > dJ> I'm not sure how much this will help, but here are the first few lines > dJ> of the file in question (not sure if it will come out right) : > dJ> пpовеpк микpосхемы TL494 и ее логов > > This is Russian text in cyrillic, although some codes looks dropped. > Below I translate this (although my English, especially chipsets related, > is > weak). > > dJ> (OE1114..."4, mPC494C, IR3M02) > dJ> ' сост в этой ^' входит: з д ющий геер тор пилообр зого > dJ> пряжеия А1, ч стот геер тор з д ется вешим резистором R1 > dJ> кодес тором C1 и может быть приближео определе по формуле > dJ> f=1/(C1*R1). R1 включ ется между вывод ми 6 и 7, C1 между > dJ> вывод ми 5 и 7. Амплитуд пилы е з висит от оми лов R1 и C1 и > dJ> приблизительо р в 4'; усилитель цепи обр той связи DA2; > dJ> широто-импульсый модулятор, выполеый комп р торе DA4; > > "check for TL494 chips and its logs > (OE1114..."4, mPC494C, IR3M02) > 'contents of this ^' includes: drive generator of sawtooth voltage A1, > generator frequency defined by external resistor R1, condenser C1 and may > be > approximated by f=1/(C1*R1) formula. R1 should be inserted between outputs > 6 and 7, whereas C1 between 5 and 7. Amplitude of saw not depends from R1 > and C1 nominals and approximately equal to 4'; amplifier of feedback chain > DA2; pulse duration modulator, implemented in DA4 comparator" >