Editing TRS-80 Model 100 (section)

== Specifications ==
[[File:TRS-80 Model-100 Inside.jpg|thumb|The internals of the TRS-80 Model 100. The left half is the back.]]
* Processor: 8-bit [[Oki Electric Industry|Oki]] [[Intel 8085|80C85]], [[CMOS]], {{val|2.4576|u=MHz}}
* Memory: 32 KB [[read-only memory|ROM]]; 8, 16, 24, or 32 KB [[static RAM]]. Machines with less than 32 KB can be expanded in 8 KB increments of plug-in static RAM modules. An additional 32 KB Option ROM can be installed, for a total of 64 KB of ROM ([[bank switching|bank-switched]] in a 32 KB aperture), and the Standard ROM is [[CPU socket|socket-mounted]] (not soldered-in) so is readily replaceable.
* Display: 8 lines, 40 characters [[LCD]], [[Twisted nematic field effect|twisted nematic]] (gray) monochrome, with 240 by 64 [[pixel]] addressable graphics. The screen is reflective, not [[backlighting|backlit]].<ref>The display hardware is pure graphics; character display is generated by software, and the 8x40 character format is a characteristic of the standard ROM software (which, incidentally, is socketed and replaceable).</ref> The screen was made by [[Sharp Electronics]].<ref name=infoworld84>[https://books.google.com/books?id=fC4EAAAAMBAJ&pg=PA22 InfoWorld Jan 23, 1984] {{Webarchive|url=https://web.archive.org/web/20230927194151/https://books.google.com/books?id=fC4EAAAAMBAJ&pg=PA22 |date=September 27, 2023 }} Sharp's 25-line display for lap models due out soon, Tom Shay</ref> The LCD controllers are by [[Hitachi]]: (10) HD44102CH column controller [[integrated circuits|ICs]] and (2) HD44103CH row driver ICs; the HD44102CH's provide the programmable hardware interface to software.  The refresh rate is about {{val|70|u=Hz}} (coarsely regulated by an [[RC oscillator]], not a crystal).
* Keyboard: 56 keys, [[QWERTY]] layout with full standard spacing, 8 programmable [[function keys]], 4 dedicated command keys, and 4 cursor control keys. These last 16 are tactile "button"-style keys. Almost all keys other than the 16 "button" keys are capable of [[key rollover]] (without phantom keys appearing depressed), so multi-key combinations can be used.
* Peripherals: The basic unit includes: Built-in 300 [[baud]] telephone ([[Plain old telephone service|POTS]]) [[modem]] (North American versions), [[IEEE 1284|Centronics]]-compatible parallel printer port, [[RS-232]] serial communication port (sharing serial I/O chip with internal modem), [[barcode reader]] input, cassette audio tape I/O, [[real-time clock]].
* Expansion: System bus interface [[DIP socket]] (under a cover on the bottom of the machine).
* Dimensions: {{val|300|x|215|x|50|u=mm}}, weight about {{convert|1.4|kg|lb}} with batteries
* Power supply: Four penlight (AA) cells, or external power adapter 6V (>180 mA, tip negative configuration)

The 8K and 24K versions sold for {{US$|1099}} and {{US$|1399}} respectively.<ref>{{cite web |url=http://www.classiccmp.org/dunfield/kyocera/h/m100ca84.jpg |title=The Micro Executive Workstation(TM) |access-date=January 8, 2008 |year=1984 |work=Radio Shack 1984 Catalog |publisher=Tandy Corporation |pages=59 |archive-date=September 27, 2007 |archive-url=https://web.archive.org/web/20070927031349/http://www.classiccmp.org/dunfield/kyocera/h/m100ca84.jpg |url-status=live }}</ref>

The Model 100 was promoted as being able to run up to 20 hours and maintain memory up to 30 days on a set of four [[alkaline battery|alkaline]] [[AA battery|AA batteries]]. It could not run from the rechargeable [[nickel-cadmium batteries]] available at the time, but a hardware modification was available that made this possible.{{citation needed|date=March 2017}}