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<title>Compact Computer 40</title>

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</style><table class="infobox hproduct vevent"><caption class="infobox-title fn summary">Compact Computer 40</caption><tbody><tr><td colspan="2" class="infobox-image"></td></tr><tr><th scope="row" class="infobox-label">Developer</th><td class="infobox-data"><a href="Texas_Instruments" title="Texas Instruments">Texas Instruments</a></td></tr><tr><th scope="row" class="infobox-label">Manufacturer</th><td class="infobox-data">Texas Instruments</td></tr><tr><th scope="row" class="infobox-label">Type</th><td class="infobox-data"><a href="Notebook_computer" title="Notebook computer">Notebook computer</a></td></tr><tr><th scope="row" class="infobox-label">Release date</th><td class="infobox-data">March 1983<span style="display: none;"> (<span class="bday dtstart published updated itvstart">1983-03</span>)</span></td></tr><tr><th scope="row" class="infobox-label">Introductory price</th><td class="infobox-data"><span style="white-space: nowrap">US$249</span> (equivalent to $786.1 in 2024)</td></tr><tr><th scope="row" class="infobox-label"><a href="Central_processing_unit" title="Central processing unit">CPU</a></th><td class="infobox-data">TMS70C20 @ 2.5 MHz</td></tr><tr><th scope="row" class="infobox-label">Memory</th><td class="infobox-data">6 <a href="Kilobyte" title="Kilobyte">KB</a></td></tr></tbody></table>

<p>The <b>Compact Computer 40</b>, or <b>CC-40</b>, is a <a href="Notebook_computer" title="Notebook computer">notebook-sized</a> computer developed by <a href="Texas_Instruments" title="Texas Instruments">Texas Instruments</a>. It started development in 1981,<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> and was released in March 1983 for US$249. The CC-40 has a single-line 31 character <a href="LCD" class="mw-redirect" title="LCD">LCD</a> display, weighs 600 grams (21 ounces) and is powered by an <a href="AC_adapter" title="AC adapter">AC adapter</a> or can operate for 200 hours on four <a href="AA_battery" title="AA battery">AA batteries</a>. Memory is not erased by turning the unit off; it can retain data for several months. The CC-40 lacks a way to store data more permanently. Software was only available on <a href="ROM_cartridge" title="ROM cartridge">cartridge</a> or by typing programs into its built-in <a href="BASIC" title="BASIC">BASIC</a> interpreter. The <a href="BASIC_interpreter" title="BASIC interpreter">BASIC interpreter</a> is similar but not identical to that of the <a href="TI-99/4A" title="TI-99/4A">TI-99/4A</a>.

</p><p>The CC-40 uses TI's TMS70C20 CPU, an 8-bit <a href="Microprocessor" title="Microprocessor">microprocessor</a> that runs at 2.5 MHz. The system has 6 <a href="Kilobytes" class="mw-redirect" title="Kilobytes">kilobytes</a> of <a href="Random-access_memory" title="Random-access memory">random-access memory</a> (RAM; expandable to 18 KB), and 34 KB of <a href="Read-only_memory" title="Read-only memory">read-only memory</a> (ROM). Peripherals can be connected via a <a href="Hexbus" class="mw-redirect" title="Hexbus">Hexbus</a> port: an 80 column printer, printer/plotter, <a href="RS-232" title="RS-232">RS-232</a> interface, and modem.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> A licensed version of the <a href="Exatron_Stringy_Floppy" title="Exatron Stringy Floppy">Exatron Stringy Floppy</a> as a digital "Wafertape" unit depicted on the computer's box was only released as a prototype, reportedly because it proved too unreliable.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading2"><h2 id="Development">Development</h2></div>

<p>The Compact Computer 40 was developed under the internal codename "Lonestar".<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> "We believe this is a solutions machine [for] 30 million professionals and college students", a TI executive said in mid-1983.<sup id="cite_ref-mace19830530saddle_5-0" class="reference"><a href="#cite_note-mace19830530saddle-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading2"><h2 id="Reception">Reception</h2></div>

<p><i><a href="BYTE" class="mw-redirect" title="BYTE">BYTE</a></i> heavily criticized the CC-40, noting that "there's no <a href="Real-time_clock" title="Real-time clock">clock</a>. No <a href="File_system" title="File system">file system</a>. Only one BASIC program at a time can reside in memory, and the user can only work with about 5200 bytes of that. And the keyboard is vile". It also noted the lack of any external storage because the TI Wafertape drive was not available, and the complete lack of software. The review suggested that the computer should be considered a "dandy <a href="Scientific_calculator" title="Scientific calculator">scientific calculator</a>" since good programmable calculators cost about the same as the CC-40's <span style="white-space: nowrap">$250</span> price, but that otherwise "virtually all of its competition vastly outstrips it in power and features", including the <span style="white-space: nowrap">$99</span> TI-99/4A.<sup id="cite_ref-ramsey198309_6-0" class="reference"><a href="#cite_note-ramsey198309-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>

</p><p>In a review for <i><a href="Creative_Computing" class="mw-redirect" title="Creative Computing">Creative Computing</a></i>, Joe Devlin wrote, "The permanent memory and powerful Basic exceed the capabilities found in most hand-held computers."<sup id="cite_ref-devlin_7-0" class="reference"><a href="#cite_note-devlin-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> He recommended it as a convenient tool for learning BASIC or for someone who frequently does calculations with formulas.<sup id="cite_ref-devlin_7-1" class="reference"><a href="#cite_note-devlin-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>

</p><p>In 1983, <i>MicroKids</i> magazine included the CC-40 on a list of "Top 10 Great Gift Ideas."<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading2"><h2 id="Legacy_and_Planned_Software/Hardware">Legacy and Planned Software/Hardware</h2></div>

<div class="mw-heading mw-heading3"><h3 id="Planned_hardware">Planned hardware</h3></div>

<p>TI planned to license the <a href="Exatron_Stringy_Floppy" title="Exatron Stringy Floppy">Exatron Stringy Floppy</a> as the Wafertape<sup id="cite_ref-mace19830530saddle_5-1" class="reference"><a href="#cite_note-mace19830530saddle-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading3"><h3 id="Planned_software">Planned software</h3></div>

<p>According to TI Engineer Stephen Reid, these are the software titles that would have been released for the CC-40 had the Hexbus Waftertape drive been reliable and released. Each program (or combination of programs) would have been available to be purchased on Waftertape at a retail outlet.

</p><p>All code to the below programs was authored and finalized. These programs are archived at Texas Instruments, and some documentation is also written. The programs were never released to the public due to the failure of the Hexbus Waftertape drive.

</p>

<caption>Wafertape Library for the CC-40

</caption>

<th>Control Charts

</th>

<th>Dynamics

</th>

<th>Electrical Engineering

</th>

<th>Extras

</th>

<th>Inventory (control and management)

</th>

<th>Non Parametric Stat

</th>

<th>PDraw (pen plotter drawing)

</th>

<th>Photo (darkroom and film exposure/processing)

</th></tr>

<tr>

<td>PCHART

</td>

<td>CIRCLE

</td>

<td>AMP

</td>

<td>CONVERSN

</td>

<td>EOQ

</td>

<td>CHISQR

</td>

<td>CEDIT

</td>

<td>BW

</td></tr>

<tr>

<td>P OR NP

</td>

<td>COLLIDE

</td>

<td>BIPOLE

</td>

<td>KNMATIC1

</td>

<td>LATE

</td>

<td>COCHRAN

</td>

<td>EDIT

</td>

<td>COLOR

</td></tr>

<tr>

<td>RANGE

</td>

<td>INERTIA

</td>

<td>COIL

</td>

<td>KNMATIC2

</td>

<td>OVHD

</td>

<td>FRIEDMAN

</td>

<td>PERTRAN

</td>

<td>DEPTH

</td></tr>

<tr>

<td>STDDV

</td>

<td>LINEAR

</td>

<td>DELTA

</td>

<td>ORBIT

</td>

<td>PGMT

</td>

<td>GAUSS

</td>

<td>PLOTTERS

</td>

<td>EXTUBE

</td></tr>

<tr>

<td>UCHART

</td>

<td>PROJ

</td>

<td>FIELD

</td>

<td>

</td>

<td>RT

</td>

<td>KRUSWALL

</td>

<td>TDEE

</td>

<td>FLASH

</td></tr>

<tr>

<td>U OR C

</td>

<td>ROTATE

</td>

<td>LDFLOW

</td>

<td>

</td>

<td>SUM

</td>

<td>RANK

</td>

<td>TIMED

</td>

<td>LRATIO

</td></tr>

<tr>

<td>

</td>

<td>SHM

</td>

<td>POWER

</td>

<td>

</td>

<td>TOTAL

</td>

<td>RANKSUB

</td>

<td>

</td>

<td>SLENS

</td></tr>

<tr>

<td>

</td>

<td>VECTOR

</td>

<td>RADIAL

</td>

<td>

</td>

<td>

</td>

<td>RUNS

</td>

<td>

</td>

<td>

</td></tr>

<tr>

<td>

</td>

<td>

</td>

<td>VOLT

</td>

<td>

</td>

<td>

</td>

<td>RXC

</td>

<td>

</td>

<td>

</td></tr>

<tr>

<td>

</td>

<td>

</td>

<td>

</td>

<td>

</td>

<td>

</td>

<td>TAU

</td>

<td>

</td>

<td>

</td></tr>

<tr>

<td>

</td>

<td>

</td>

<td>

</td>

<td>

</td>

<td>

</td>

<td>TOLLIM

</td>

<td>

</td>

<td>

</td></tr></tbody></table>

</caption>

<th>Pipe (Flow, etc)

</th>

<th>ProdPlan (production planning)

</th>

<th>Profit

</th>

<th>Regression

</th>

<th>Samples

</th>

<th>Solar

</th>

<th>Thermodynamics

</th>

<th>WaferTape Utiliities*

</th></tr>

<tr>

<td>DWE

</td>

<td>BAL

</td>

<td>ATCF

</td>

<td>ADV

</td>

<td>AOQL

</td>

<td>FCHART

</td>

<td>BDPOINT

</td>

<td>CARTDIR

</td></tr>

<tr>

<td>EPM

</td>

<td>BREAK

</td>

<td>IRRA

</td>

<td>AUTO

</td>

<td>CONT

</td>

<td>GAIN

</td>

<td>FLOW

</td>

<td>CARTINIT

</td></tr>

<tr>

<td>GLPS

</td>

<td>CAP

</td>

<td>IRRB

</td>

<td>CHECK

</td>

<td>DES

</td>

<td>HEAT

</td>

<td>HEATCAP

</td>

<td>CARTLOAD

</td></tr>

<tr>

<td>HCM

</td>

<td>CP

</td>

<td>MDS

</td>

<td>CORR

</td>

<td>SAM

</td>

<td>HEATEXC

</td>

<td>PENG

</td>

<td>CARTSAVE

</td></tr>

<tr>

<td>HTC

</td>

<td>CV

</td>

<td>NPVA

</td>

<td>CORR2

</td>

<td>UNIT

</td>

<td>HTC

</td>

<td>PSY

</td>

<td>CARTSAVX

</td></tr>

<tr>

<td>HTIP

</td>

<td>RATES

</td>

<td>NPVB

</td>

<td>CUBIC

</td>

<td>VARI

</td>

<td>SOLECO

</td>

<td>REACT

</td>

<td>DIR

</td></tr>

<tr>

<td>HWF

</td>

<td>TIME

</td>

<td>

</td>

<td>EXP

</td>

<td>

</td>

<td>ZENITH

</td>

<td>SRK

</td>

<td>FILECOPY

</td></tr>

<tr>

<td>WPD

</td>

<td>TV

</td>

<td>

</td>

<td>MLT

</td>

<td>

</td>

<td>

</td>

<td>STEAM

</td>

<td>PROG

</td></tr>

<tr>

<td>

</td>

<td>

</td>

<td>

</td>

<td>MLT2

</td>

<td>

</td>

<td>

</td>

<td>

</td>

<td>SUBPROG

</td></tr>

<tr>

<td>

</td>

<td>

</td>

<td>

</td>

<td>NL

</td>

<td>

</td>

<td>

</td>

<td>

</td>

<td>TAPECOPY

</td></tr>

<tr>

<td>

</td>

<td>

</td>

<td>

</td>

<td>WAFER (utility)

</td>

<td>

</td>

<td>

</td>

<td>

</td>

<td>

</td></tr></tbody></table>

<p>*This was for building cartridge images, etc. These were mostly ram-loadable assembly utilities.

</p>

<div class="mw-heading mw-heading3"><h3 id="Planned_Hardware_2">Planned Hardware</h3></div>

<p>The <a href="Hex-Bus" title="Hex-Bus">Hex-Bus</a> interface was also available for the <a href="TI-99/4A" title="TI-99/4A">TI-99/4A</a> as an unreleased prototype expansion peripheral. It was built into the prototypes of the cancelled TI-99/2 and TI-99/8 computers.

</p><p>An improved model, the CC-40 Plus, was in the final stages of development and included a cassette port. The project was canceled when Texas Instruments discontinued the 99/4A and exited the <a href="Home_computer" title="Home computer">home computer</a> market. Most of the architecture of the CC-40 Plus was reused in the <a href="TI-74" title="TI-74">Texas Instruments TI-74</a>. The TI-74 changed the physical footprint of the Hexbus port and rename it Dockbus.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> Old Hexbus peripherals could even be used on the TI-74 <a rel="nofollow" class="external text" href="https://store.go4retro.com/texas-instruments/ti-hexbus-dockbus-converter/">with an adapter</a>.

</p><p>Also in development was the Compact Computer 70 (codenamed "Superstar"). The CC-70 was to have four cartridge ports, more RAM, and an 8 x 80 display with graphics capability. The CC-70 mock-up from Calculator division lead CB Wilson showed up on eBay in 2020. Engineer Steven Reid has stated that the first run of chips for the CC-70 failed, and TI discontinued the Home Computer division in October 1983 before the chip issues could be corrected.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFacadiel2020" class="citation web cs1">acadiel (November 2020). <a rel="nofollow" class="external text" href="https://forums.atariage.com/topic/313064-cb-wilson-ti-99-related-documents/?do=findComment&comment=4728560">"CB Wilson Related Documents - Lonestar"</a>. <i>AtariAge</i><span class="reference-accessdate">. Retrieved <span class="nowrap">7 November</span> 2022</span>.</cite></span>

</li>

<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite id="CITEREFacadiel2020" class="citation web cs1">acadiel (24 October 2020). <a rel="nofollow" class="external text" href="https://forums.atariage.com/topic/312771-cb-wilson-early-80s-documentation-thread/?do=findComment&comment=4673365">"CB Wilson - CB Wilson early 80s documentation"</a>. <i>AtariAge</i><span class="reference-accessdate">. Retrieved <span class="nowrap">6 December</span> 2022</span>.</cite></span>

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<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><cite id="CITEREFacadiel2020" class="citation web cs1">acadiel (November 2020). <a rel="nofollow" class="external text" href="https://forums.atariage.com/topic/313064-cb-wilson-ti-99-related-documents/?do=findComment&comment=4756283">"CB Wilson - TI 99 related Documents"</a>. <i>Atariage</i><span class="reference-accessdate">. Retrieved <span class="nowrap">6 December</span> 2022</span>.</cite></span>

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<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><cite id="CITEREFacadiel2020" class="citation web cs1">acadiel (November 2020). <a rel="nofollow" class="external text" href="https://forums.atariage.com/topic/313064-cb-wilson-ti-99-related-documents/?do=findComment&comment=4749127">"CB Wilson - TI-99 related documentation"</a>. <i>AtariAge</i><span class="reference-accessdate">. Retrieved <span class="nowrap">6 December</span> 2022</span>.</cite></span>

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<li id="cite_note-mace19830530saddle-5"><span class="mw-cite-backlink">^ <a href="#cite_ref-mace19830530saddle_5-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-mace19830530saddle_5-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><cite id="CITEREFMace1983" class="citation magazine cs1">Mace, Scott (1983-05-30). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=4S8EAAAAMBAJ&pg=PA26">"Texas Instruments in the Saddle"</a>. <i>InfoWorld</i>. pp. <span class="nowrap">26–</span>28<span class="reference-accessdate">. Retrieved <span class="nowrap">2024-12-29</span></span>.</cite></span>

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<li id="cite_note-ramsey198309-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-ramsey198309_6-0">^</a></b></span> <span class="reference-text"><cite id="CITEREFRamsey,_David1983" class="citation news cs1">Ramsey, David (September 1983). <a rel="nofollow" class="external text" href="https://archive.org/stream/byte-magazine-1983-09/1983_09_BYTE_08-09_Portable_Computers_in_Depth#page/n201/mode/2up">"Epson's HX-20 and Texas Instruments' CC-40"</a>. <i>BYTE</i>. p. 193<span class="reference-accessdate">. Retrieved <span class="nowrap">20 October</span> 2013</span>.</cite></span>

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<li id="cite_note-devlin-7"><span class="mw-cite-backlink">^ <a href="#cite_ref-devlin_7-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-devlin_7-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><cite id="CITEREFDevlin1983" class="citation journal cs1">Devlin, Joe (August 1983). <a rel="nofollow" class="external text" href="https://archive.org/details/Creative_Computing_1983-08/page/n39">"Texas Instruments CC-40"</a>. <i>Creative Computing</i>: <span class="nowrap">37–</span>43.</cite></span>

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<li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><cite id="CITEREFKuhn1983" class="citation journal cs1">Kuhn, Paul (December 1983). <a rel="nofollow" class="external text" href="https://archive.org/details/MicroKids_Issue_01_Volume_01_No_01_1983-12_Microkids_Publishing_US/page/n61">"Top 10 Great Gift Ideas"</a>. <i>MicroKids</i>. <b>1</b> (1): 60.</cite></span>

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<li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><cite id="CITEREFGood" class="citation web cs1">Good, Charles. <a rel="nofollow" class="external text" href="https://ftp.whtech.com/hexbus_cc40_ti74/cc40%20ti74%20hexbus.txt">"A Compendium of CC-40 Information"</a>. <i>WHTech TI Archive</i>.</cite></span>

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<li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><cite id="CITEREFacadiel2020" class="citation web cs1">acadiel (November 2020). <a rel="nofollow" class="external text" href="https://forums.atariage.com/topic/313064-cb-wilson-ti-99-related-documents/?do=findComment&comment=5166954">"CB Wilson - TI99 related Documentation"</a>. <i>Atariage</i><span class="reference-accessdate">. Retrieved <span class="nowrap">6 December</span> 2022</span>.</cite></span>

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<ul><li>Thomas, David (1983). <i>Learn BASIC: A Guide to Programming the Texas Instruments Compact Computer 40</i>. Texas Instruments, Inc. and McGraw Hill, Inc. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-07-064257-5</bdi>.</li></ul>

<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

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<div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; font-style: italic;"><a href="https://commons.wikimedia.org/wiki/Category:Texas_Instruments_Compact_Computer_40" class="extiw external" title="commons:Category:Texas Instruments Compact Computer 40">Texas Instruments Compact Computer 40</a></span>.</div></div>

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<ul><li><a rel="nofollow" class="external text" href="http://casio.ledudu.com/pockets.asp?type=178&lg=eng">CC-40 images and documentaiton</a></li>

<li><a rel="nofollow" class="external text" href="http://oldcomputers.net/cc-40.html">OLD-COMPUTERS.COM online-museum CC-40 page</a></li>

<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20220722161147/http://www.suddenlink.net/pages/curtismc/cc40.htm">Curtis McCain Page on the CC-40</a> (archived)</li></ul>

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