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  1. The standard calculation of pi produces a number that extends to infinity but we don't really need that. Back in 1706 a good approximation calculation was produced by John Machin and we can program that to produce quite a few accurate decimal places fairly quickly in Extended Basic. I wrote the program below back in March 1991. It uses the Extended Basic "logical operator" AND. You can see what this does with FOR T=1 TO 20 :: PRINT T;T AND 2 :: NEXT T However- calculating PI: 1 ! from W F DOSSETT, AUSTIN, TEXAS, 25 feb 88 2 ! REC NEWSLETTER March 1988 Vol 3 #2 3 ! for ti99/4a s shaw 3/91 4 ! from John Machin, 1706 7 ! n=7 for 13 digit accuracy of ti99/4a 8 ! n>7 if language goes beyond 13 digits! 9 ! eg n=35 for 53 digits 10 ! 100 N=7 :: K=-1 110 K=K+1 120 I=-((2 AND 2*K)-1) 130 U=U+4*I/((2*K+1)*5^(2*K+1)) 140 V=V+I/((2*K+1)*239^(2*K+1)) 150 IF K<=N THEN 110 160 W=U-V :: PI2=4*W 170 ! DONE 180 PRINT PI2,PI 181 ! calculated number then onboard number 190 PRINT (PI2-PI)*1000,! COMPARE with on board variable 191 ! difference times 1000 makes it easier to see 200 PRINT (PI2-(4*ATN(1)))*1000 ! compare with TI Basic's calculation 210 PRINT " ";(PI2-3.14)*100;:: DISPLAY AT(24,2)SIZE(4):"3.14" ! displays ALL the digits actually in the variable!!!=13 incl dec point. 220 PRINT " 3.14159265358979 -etc" ! more accurate actual value for comparison! 230 END see https://en.wikipedia.org/wiki/John_Machin "The benefit of the new formula, a variation on the Gregory/Leibniz series (Pi/4 = arctan 1), was that it had a significantly increased rate of convergence, which made it a much more practical method of calculation." s
  2. Updated lists in alphabetical order of scanned manuals: 1. On this site- with the URLs of the appropriate pages for the document - in TEXT format 2. Across the Internet including this site, but with only generic locator urls, not leading to the specific document- in PDF format. Some lower quality files are omitted to encourage higher quality additions. If I have missed any good clean docs online anywhere please let me know. s omegalist.txt softwaremanualsamalgMar20.pdf
  3. In a zip of tif image files, clean 480dpi scans of the manual for TUNNELS OF DOOM PHM 3042 for you to read, print, OCR or PDF. Game designed and programmed by Kevin Kenney (c) TI 1982 The zip includes a hi res scan of the red module label. This is the detailed 44 page manual and is well worth rereading from cover to cover. Note: When TI issued the manuals for the 99/4a they added a note inside the front cover of the keys to use on the 4a but left the internal text which only referred to the 99/4 keys. For Tunnels of Doom the inside text was amended to refer to both consoles. The text inside the front cover "Quick Reference Guide" is duplicated inside the manual plus an extra 14 keys. Tunnels of Doom tribute website with interviews etc at http://ridingthecrest.com/edburns/classic-gaming/tunnels/ Tunnels of Doom BIN file for FR99 module plus requires 32k ram: https://atariage.com/forums/topic/253095-%F0%9F%96%A5-flashrom-99-finalgrom-99-repository-02282020/?do=findComment&comment=3532106 ToD games in a dsk file for emulators- includes k-mart and doctor- https://atariage.com/forums/topic/209562-new-tunnels-of-doom-games/?do=findComment&comment=2733723 The java reworking of Tunnels of Doom is now into version 1.2b and can be found with some converted datasets (Including kmart...) at http://www.dreamcodex.com/todr.php. The ToD games are http://www.dreamcodex.com/download/tod_modules.zip and the reworked ToD in Java is at http://www.dreamcodex.com/download/todr.zip Tunnels_of_Doom.zip
  4. You can find a directory full of FWEB 4.40 documentation in TEXT format here: 40 column: http://ftp.whtech.com/emulators/pc99/funnelweb/40columndocs/ 80 column (you also need the above!): http://ftp.whtech.com/emulators/pc99/funnelweb/80columndocs/ You can read TXT files on any computer- generally your browser will display them. s
  5. Alas this has now been cancelled / postponed to follow Government restrictions on travel, groups, and the closure of pubs. s
  6. A good third party manual - ZIP files of hi res clean TIF images at 480dpi for you to read, print, OCR or pdf for: The Missing Link by Harry Wilhelm, published by Texaments. A very useful extension to Extended Basic, requires 32k ram and disk system, allows bit map graphics. Do note the detailed description of the use of stack space, and how to use less. Notes some normal ExBas commands to be avoided. Docs include the included smaller programs Paper Saver, Program>IV254 conversion (to use less stack); Font Chardef The_Missing_Link.zip
  7. Use the second picture of the female connection, this is clearly labelled with the pins when viewed from this viewpoint. Note the 12v lurking there and be very careful not to connect 12v to an unsuspecting video line. Note especially that this is not an RGB or composite video socket. The output here is analog "PAL Colour Difference". There is no RGB here. And TI did a really bad job of engineering this, it was quite some distance from the standard and very unlikely you can find a colour monitor that will take it today, although you may find a mono monitor will work. The MODULATOR box that you have contains a standard third party RF Modulator which outputs to Channel 36, PLUS the circuit needed to transfer the colour difference console output to the composite that RF modulators require, and it is possible to extract a composite signal by tapping into the input of the internal modulator component . The UK used a different PAL standard to Europe (!) with a wider gap between audio channel and video channel, which caused some problems tuning our UK tv sets to the TI RF Modulator output which was European. You may be able to find an analog tv set (PAL) that allows you to tune to Channel 36- and connect the metal modulator box to the tv with an aerial connector. The TV set will need to find Channel 36 and you may need to use the tv set auto-tuning with the computer connected. Perhaps a little easier, some of us use very old video cassette recorders with UHF PAL tuners and SCART output to connect to a modernish tv set- the tape transport can be shot, you only need the tuner, so may find one quite cheap. You will still need to tune a channel on the old VCR to Channel 36. have fun.... s
  8. Zipped TIF format images of the manual for: Myarc MEXP-1 Memory Expansion Card for you to print, read, OCR or PDF. This manual covers the 32k, 128k and 512k models. Note- there is an extended section on using DATA files in Basic/Extended Basic which may be helpful if you are struggling with file access using floppy disks. The 512k model could be configured to be used as normal 32k expansion plus a ram disk plus a print spooler. The contents of the ram disk disappeared on power off. The ram disk could be used in any language or module that allowed you to use a device name "RD." instead of "DSK1." OR it could be configured at the comand line to emulate DSK1. for those programs that did not allow RD. And for limited programs such as Multiplan which looked for DSK.TIMP, you could also have the RAM disk emulate disk DSK.TIMP. There is also a note in the manual regarding assembly access to the ram banks- the 128k and 512k cards had 96k in four banks. From memory I think the Funlweb operating system could use this to tuck part of itself somewhere safe. Myarc Extended Basic OS used/required the card but the card was very useful without Myarc XB.. Myarc_Mem_Exp.zip
  9. Clean hi res TIF images of the manual, zipped together, for you to read /print/ ocr/ pdf for: TI LOGO SAMPLER PHT 6070 / PHD 5070 (c) 1981 TI.. Six of the seven educational activities are designed for children aged 3 to 8, written by Coleta L Lewis at Lamplighter School, Dallas. A tape or disk release which requires the TI Logo module, 32k expansion memory, and either a cassette recorder or disk controller and disk drive. The manuals supplied with the disk and the tape were identical. My manual was punched for 3 ring binder but I did not receive a binder. The zip includes a hi res image of the cassette label - the tape label was on one side of the tape only. Manual page size was 216mm x 280mm. Procedures: Bear, Squares, Picture, Patterns, Elephant, Fish, Frog, Horse, Spring. Activities: Line, Paint, Target, Colors, People, Grid __, Listen. LogoSampler.zip
  10. Good idea- here is a slight modification - for maximum cross platform use it is modified to be placed in the VENDORS folder. Added an option to view sorted by program name or vendor name. I may have added the odd error! Correction to the first listing above- amend the entry for PARSEC language variations (done in the attached). regards s mylist2.html
  11. On to the big fat manuals now- in the early days TI had a lot of paper to use... ZIP files of hi res clean TIF images at 480dpi for you to read, print, OCR or pdf for: Tax/Investment Record Keeping PHM 3016 One of the early utilitarian modules intended to make the TI99/4 a must have domestic purchase, but missing the mark slightly in terms of user friendliness and ease of use. Did anyone ever use this? Very much for the tax, accounting and domestic arrangements of the USA at that time. VERY thick manual so it is in two separate zip files, pages 1-32 and pages 33-64. TaxInvRK_Pt1.zip TaxInvRK_Pt2.zip
  12. Consolidated- see the cyc.pdf in the cyc directory, over 8000 pages of index. I found the thorn.pdf referenced in there fairly quickly using FIND with my pdf viewer and the cyc.pdf gives the full path to the document. Simple: articles 140 pdfs Books 49 pdfs Pubs 149 pdfs Usrgroup 242 pdfs Vendors 1216 pdfs Not very many? Ah- but the magazines have a years worth in a single pdf! On the other hand in vendors each software title manual has its own pdf. Pretty well all of the PDFs are text searchable too, using your PDF viewer.. I'm not sure what you are looking for- there is just so much data in there, simple probably won't work too well. Perhaps the 8000++ page index is overwhelming, but you can always search. You may even find your computer's "find in file" utility of use. good reading.... s
  13. If you have a TI Basic program that your emulator allows you to load but not run, one possibility is to try loading the Basic program into Extended Basic, then merge in the short VDP utility which allows Basic programs to run in ExBas - then save to disk. The system may save the file as IV254 but that just means long program (too big for VDP...) and it loads in the usual OLD way. Your Basic program will now need Extended Basic and 32k ram, but will at least be runnable from (emulated) disk. REAL IRON.... If you use the CALL LOAD to load a TI Basic cassette program into TI Basic, you may be able to reduce the size of the program by editing and then SAVE back to tape, then see if it will load with CALL FILES(1) to enable you to save it to disk. OR the really tough way... If you can get the program into memory with the CALL LOAD, it may be possible to edit it into two parts (yes it is hard work) and save each part to tape, then with CALL FILES(1) set, move both parts to DISK. You can then use Extended Basic's MERGE facility to get the two parts back together and add the VDP utility. - set disk drive off with the call load - OLD program from tape - edit out a hundred or so lines at the end - save to another tape - reload original program and edit out a hundred or so lines from the start - save to another tape Reset the disk drives back, use CALL FILES(1) if needed- Switch to Extended Basic and load one of the tapes and save to disk in MERGE format. Load the other part of the program and MERGE in the first part and the VDP utility. Yep, hard work, but it should work. May take ages. And you only need to do it once. The Basic program will now be on disk but needs XB and 32k ram. s
  14. I have had so much strange hardware on trial and so many XBs - many of which have disappeared- I honestly can't recall, and could have misremembered. Right now I don't have a working disk controller. However to keep everything relevant in the thread: In XB with 32k and Disk Controller- CALL LOAD(-31888,63,255) then NEW will advise your console it really doesn't have a disk controller attached and will free up the vdp memory for you. Don't try to use a disk until you reset eg with CALL LOAD(-31888,55,255) then NEW which puts it back to 3 for you. After using the CALL LOAD, if you have just told the system you don't have a disk controller, don't try CALL FILES(3), use the latter CALL FILES. Effect: Each FILE buffer uses up 518 bytes. However between (0) and (1) you will save 1052 bytes. Or to put it another way, when you plug the disk controller in the VDP has 2088 bytes less to transfer the cassette file into.
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