870: (equivalent to $ 15,780 in 2023), the Model 16 sold poorly. By June 1982 the company had shipped 2,000 units to stores, with the majority unsold. Five months after its introduction, the computer still had no TRSDOS-16 applications; owners had to run Model II or CP/M software and applications. Its release forced the few developers of Model II software to "start all over again", Green said, because customers would not want to run Z80 software on the Model 16. Tandy admitted that it should have encouraged third-party software development, which resulted in the
811:, which has half-height ("thinline") double-sided floppy drives, and integrates most of the Model II electronics into a single main board. The video and keyboard card plugged into a single slot in the main board. An expansion card cage was available as an option, allowing six more plug-in cards. The white phosphor CRT on the Model II was replaced with a green phosphor tube on the Model 12 for easier viewing and less eye strain. Its keyboard sported eight function keys. The Model 12 is essentially a
527:, a 68000 CPU board that could address up to 256 KB memory, and a board for pixel-addressable graphics with 640 by 240 resolution. It could overlay the text screen with the bitmapped display. The same graphics board (catalog number 26-4104) could be fitted to the later Models 12 and 16. It came with a modified BASIC providing rudimentary screen drawing capabilities like line, box and circle drawing, shading and filling, a viewport capability and array transfer between graphics RAM and CPU RAM.
2124:
985:
Unix development system. While criticizing Xenix's user unfriendliness for small business customers, and wondering "whether Radio Shack can or will invest" in training on the very sophisticated operating system for its dealers, they concluded that the Model 16B "deserves serious consideration". The magazine in August 1984 described the 16B as "a usable multiuser microcomputer system", but with a slow hard drive that might limit the computer to two users.
460:
not use their machines (Radio Shack sold replacement packs for $ 50) and Model IIs sold from 1981 onward used a different floppy controller that did not require it. Hard disks offered for the Model II also used a terminating resistor pack. These were sold as master and slave drives, with the master hard disk (which had the resistor pack) needing to be the last one on the chain. Like most hard disks offered on 8-bit computers, there was no
1968:
791:
Model II as "less than dynamic", because of the company's focus on the Model III. Tandy produced and marketed various Model II business applications ranging from accounting, medical office, legal office, payroll, inventory, order entry, and sales analysis, to general-purpose applications for word processing, database management, and later spreadsheet work. Some were produced in-house (like the
129:
25:
384:, almost all of the Model II's memory could be used by software. The Model II ran the TRSDOS operating system (renamed to TRSDOS-II starting with version 4.0) and BASIC. The different disk format and system architecture made it impossible to run Model I/III software on the Model II, thus it never had as much available. This was somewhat mitigated by the availability of the
1962:
845:, Microsoft's version of UNIX. TRSDOS-16 is a TRSDOS II-4.1 application providing a 68000 interface and support for up to three users, with no additional features and little compatible software. 68000 functionality was added as an extension, loading 68000 code into the 68000 memory via a shared memory window with the Z80.
984:
s review in
January 1984 stated that "the Model 16B is a fairly well-implemented and apparently well-supported Xenix system" that would likely receive much support from software developers. The authors said that it greatly improved on the Model I and III, and surprised them by being a very good small
719:
Model II BASIC operates in one of two display modes depending on the last character displayed. In Scroll Mode (invoked if the last character displayed had an ASCII value from 32-127), text will scroll off the screen when the bottom is reached or wrap around to the next line on the left when the right
534:
upper 32K page segment (up to fifteen 32K pages were supported). However, the machine did not provide enough card slots to physically upgrade the RAM to 512K. This was because RAM was provided via 32K or 64K cards and only a few open card slots were available on a standard Model II, since the basic
790:
estimated that sales of the Model II as of August 1982 were about 10% of the Model I, discouraging third-party developers from creating software for the more expensive computer; the small software library, in turn, discouraged sales of the Model II. He described Tandy's software support for the
442:
formatting, and a sector size of 128 bytes for a formatted capacity of about 250 KB, however the Model II had a double density controller, so the disk format used 256 byte sectors and formatted capacity was about 492 KB. If users installed a double-sided drive, they could get 1 MB of space, however
750:
statements, making it less hacker-friendly than Model I/III BASIC. It was possible to regain most of this functionality by using the extremely similar MBASIC provided with CP/M. The MEM command, used in Model I/III BASIC to display the amount of free BASIC memory, was removed and its functionality
459:
pins. This unusual setup was chosen so the users would not have to remove the cover and install or remove a terminating resistor pack on the floppy drive every time they wanted to remove or attach external disk drives. It proved to be problematic since customers who lost their resistor packs could
621:
While Model I/III BASIC include a startup prompt asking if the user would like to reduce BASIC's memory area (typically done if some memory is to be reserved for machine language routines), Model II BASIC instead has this feature as a command line option (M:address) when started from the TRS-DOS
491:
with higher-quality and better-adjusted components than the modified TV set provided with the Model I. The text display on the Model II was 80x24 rather than the Model I/III's 64x16 text and also added lowercase letters, one major feature that the Model I was lacking (originally; an upgrade was
840:
as an I/O processor, or as the main processor when 8-bit Model II software was loaded. It has two half-height ("thinline") double-sided 8-inch floppy drives, though the Model II upgrade does not replace the floppy drive. The Model 16 can run either TRSDOS-16 or TRS-Xenix, a variant of
324:
stores sold the computer. Tandy advertised the Model II as "a business computer — not a hobby, 'home' or personal computer". It claimed that the computer was "ideal for a small business, and also 'just right' for many time-consuming jobs within larger businesses", including those with
467:
Unlike the Model I/III, the Model II also had a case fan due to the heat generated by the 8" floppy drive's continuously running spindle motor. The combined effect of the case fan and the floppy motor resulted in an extremely noisy computer compared to the nearly silent Model I/III.
881:
Rumors stated that Tandy would offer Xenix or another third-party operating system for the computer. In early 1983 the company indeed switched to Xenix, and offered it for free to existing customers; by mid-1983 an estimated 5,000 of 30,000 Model 16s ran Xenix. Xenix was based on
492:
available later). In addition, it could be operated in 40x24 text mode. The character set in the Model II was somewhat different from the Model I/III. It included several mathematics and currency symbols and in place of the Model I/III's semigraphics characters had 30 characters (
617:
closely derived from Level II BASIC on the Model I/III, but with a number of differences and enhanced features. Unlike the Model I/III, the Model II's BASIC was entirely RAM-resident and loaded from disk. It was 17k in size, approximately the same size as Model I/III Disk BASIC.
546:(catalog number 26-4105) which allowed the Model II (without the expensive Model 16 upgrade) to run a special version of the Visicalc spreadsheet called Enhanced Visicalc. This made available larger worksheets by using banked memory beyond the Z80's base 64 KB.
622:
prompt. If the user is planning to run a BASIC program that performs file handling, it is also required to specify the number of open files at startup via the F:files option. A BASIC program may also be specified at startup for automatic loading and execution.
454:
pack for the last drive on the chain in place of the standard method of putting a terminating resistor pack on the internal disk drives. The external resistor pack worked by looping back the I/O lines on the external floppy connector to the SA-800 drive's
399:
The floppy drive included with the Model II was a
Shugart SA-800 full-height, single-sided 8" drive; like most such drives, it spun continuously whether the disk was being accessed or not and the spindle motor was powered directly off the A/C line. The
934:, gaining an internal hard drive along the way and switching to an 8 MHz 68000. Tandy offered 8.4 MB, 15 MB, 35 MB, and 70 MB external hard drives, up to 768 KB of RAM, and up to six additional RS-232 serial ports supporting multi-user
775:. All were sold through Radio Shack. Later the simpler, more affordable Series I editor/assembler package from Radio Shack itself, familiar to many Model I hobbyists, was offered for the Model II. Radio Shack also had its own
479:. However, the Model II's video circuitry was significantly improved in the interest of better picture quality, as one of the criticisms of the Model I was that the included monitor was merely an RCA television set with the
726:
The SYSTEM command, used to exit BASIC, may also be used to "pass" a command to TRS-DOS without exiting and losing the program currently in memory; this is most commonly done for tasks such as viewing the disk directory.
708:. Model II BASIC still limits variable names to two characters as support for long variable names in Microsoft BASIC did not appear until BASIC-80 5.x in 1981. BASIC programs may be saved in ASCII in addition to
319:
from business purchasers. The computer was too limited for such use, so the company began development on the Model II in late 1978. It was announced in May 1979, deliveries began in
October, and only Tandy-owned
944:
The 16B was the most popular Unix computer in 1984, with almost 40,000 units sold. In 1987, Tandy announced that the 6000 hardware would no longer be improved; customers believed that their systems had become
515:
in the back of the machine contained two RS-232 ports and a
Centronics port. Although the expansion slots look similar to an S-100 slot, they were a proprietary design and could not be used with S-100 boards.
938:. An expansion board with 512 KB memory was offered for the 6000, raising the maximum total RAM to one megabyte. Additional memory and serial port expansion options were available from aftermarket companies.
878:. In 1983, VisiCorp produced an update of Visicalc which Tandy sold for the Model 16 called Enhanced VisiCalc. This version runs on the Z80 and uses banked memory beyond the base 64 KB for larger worksheets.
349:
As a professional business machine, the Model II used state-of-the-art hardware and had numerous features not found in the primitive Model I such as the high-speed (for the time) 4 MHz Z80A,
723:
As with all pre-v5.x implementations of BASIC-80, Model II BASIC does not reserve string space automatically and the CLEAR statement must be used at the start of a program to reserve it.
1663:...released two multiuser software packages for its powerful Model 16 microcomputer system....and Scripsit word-processing programs...The Model 16 can accommodate up to six users...
916:
TRS-Xenix was notable for being a master/slave implementation, with all I/O being performed by the Z80 while all processing was done within the otherwise I/O-free 68000 subsystem.
1853:
2163:
535:
configuration of the machine took up four slots. This deficiency was rectified with the Model 12, which could accommodate up to 768 KB RAM using the newer 4164
388:
operating system for the Model II from third parties such as
Pickles & Trout. Unlike the Model I/III, the Model II's memory map is compatible with standard
975:
in 1984 called it a "state-of-the-art business machine" that "might have taken the business market by storm had it not had a nameplate reading 'Radio Shack.'"
720:
side of the screen is reached. In
Graphics Mode (ASCII value from 128-159), BASIC wraps the screen around when the bottom row or rightmost column is reached.
832:
came out in
February 1982 as the follow-on to the Model II; an upgrade kit was available for Model II systems. The Model 16 added a 6 MHz, 16/32-bit
1862:
357:, and port instead of memory-mapped I/O. It sported 80x25 text and a single-sided 500 KB 8" floppy drive, and either 32 or 64 KB of RAM, along with two
1846:
795:
word processor), others licensed and branded as Radio Shack products (like the
Profile database), and still others marketed by Radio Shack, such as
556:
Despite being designed primarily for business or operating factory equipment, the Model II did have a handful of games available; notably the
511:
with eight expansion slots; four of these were normally occupied by the CPU card, floppy controller, keyboard/video card, and RAM. A separate
586:
1233:(magazine), November 1981, page 57, "TRS-80 Discount", Perry Oil & Gas Incorporated 137 North Main St. Perry MI 48872 (advertisement).
369:
could be banked out of Z80 memory, so that the entire 64 KB address space could be used for main memory. Unlike most computers, it had no
1486:
941:
The Model 6000 was referred to simply as the Tandy 6000 due to a marketing decision to move away from the Radio Shack and TRS-80 badges.
1839:
779:
product, Assembly
Language Development System, or popularly known as ALDS. This product was later reworked and sold for the Model 4.
2148:
1946:
108:
446:
There were several hardware revisions to the Model II over its lifespan. The first revision models (1979–80) could not boot from a
1807:
471:
The video display in the Model II is similar to the Model I. A 12" B&W television CRT is used; the monitors were supplied by
42:
392:. Three internal expansion slots could be used for add-on cards such as additional serial ports and a video board that allowed
89:
2109:
46:
969:
in 1981 called the Model II "a well-designed, capable business system" that "overcomes several limitations of the Model I".
889:
With Xenix, the Model 16 family became a popular system for small business, with a relatively large library of business and
61:
1043:
971:
1230:
536:
524:
443:
this required a modified DOS and Radio Shack did not officially support the use of double-sided drives on the Model II.
68:
557:
646:
which refers to an absolute coordinate on the screen. Model II BASIC instead accepts a row and column position (thus
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1373:
890:
1038:
35:
1831:
75:
409:
1704:
1576:
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1204:
1164:
2158:
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209:
57:
2083:
550:
484:
456:
431:, but still used the capacitive technology rather than the more well-known Cherry mechanical keyswitches.
405:
1302:
423:. Like most capacitive keyboards, it utilized a key mechanism with foam rubber disks; these are prone to
1898:
1893:
512:
818:
The Model 12 moved the
Centronics and serial ports to a cluster on the rear left side of the computer.
1144:
350:
2127:
2045:
946:
416:
408:. Like with the Model I/III/IV, boot disks on the Model II required Track 0 to be single density.
2020:
428:
326:
279:
in October 1979, and targeted at the small-business market. It is not an upgrade of the original
234:
2104:
1976:
1603:
935:
906:
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772:
488:
401:
276:
152:
142:
1731:
1652:
1623:
1548:
1402:
1116:
1087:
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1006:
799:. The company also offered products facilitating data transfer with IBM mainframe computers.
82:
1935:
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1454:
373:
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source for customization. RM-COBOL, BASIC, and C were available for programming, with
464:
support and the drive was simply treated by the OS as a giant and speedy floppy disk.
2142:
1941:
1913:
1908:
1903:
1071:
497:
272:
1145:"Mainframe Owners... Maybe TRS-80 Model II Should be Your Next Hardware Investment!"
2035:
2005:
1967:
1951:
461:
381:
366:
330:
487:, and sound stripped out. The Model II, in contrast, used a dedicated monochrome
2065:
2055:
2050:
2000:
1990:
1608:
1298:
953:
787:
439:
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with age and requiring replacement. A later version of the keyboard was made by
377:
321:
128:
24:
913:
offered as relational databases. A kernel modification kit was also available.
380:(the BIOS was loaded off the boot floppy). Because of this and the use of port
2099:
1930:
1925:
1920:
1067:"Advertisement:Radio Shack introduces its second TRS-80 computer breakthrough"
871:
1765:
1736:
1681:
1657:
1628:
1553:
1459:
1407:
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965:
894:
837:
709:
549:
Some of the technical advances first introduced on the Model II such as the
508:
504:
447:
420:
362:
214:
1522:
1491:
1378:
956:
PCs for their professional line and finally retired the Model II family.
910:
875:
796:
792:
581:
476:
451:
435:
1961:
353:, vectored interrupts, a detachable keyboard with two function keys and
898:
893:. Tandy offered multi-user word processing (Scripsit 16), spreadsheet (
760:
701:
564:
530:
The Model II architecture theoretically supported up to 512K RAM via a
424:
389:
625:
In Model I/III BASIC, the text cursor is positioned via the statement
2015:
1995:
1876:
585:
hard drives (the Model II allowed three external floppy drives to be
519:
Various expansion cards for the remaining four slots included a hard
358:
280:
198:
1153:(advertisement). Vol. 5, no. 1. January 1980. p. 109.
553:
and the improved video circuitry would later go into the Model III.
404:
in the Model II was a double-density, soft-sector unit based on the
2010:
902:
842:
815:
without the Motorola processor, and is upgradable to a Model 16B.
768:
764:
493:
385:
370:
1835:
1624:"From Home to Business: The Eclectic Radio Shack Computer Line"
738:
commands for setting block characters, cassette functions, the
1863:
TRS-80 and Tandy-branded computers, clones and related systems
1403:"Hardware Review TRS 80 Model 12, 'a refined TRS 80 Model II'"
886:, also supported up to three users, and was more established.
472:
18:
1455:"Radio Shack goes to Microsoft's XENIX for Model 16 micros"
1075:. Vol. XIII, no. 32. 15 October 1979. p. 31.
438:
standard, which specified 77 tracks, 26 sectors per track,
700:
for converting decimal values, and also added support for
570:
Tandy offered a desk custom-designed for the Model II for
563:
series were offered for it. In addition, CP/M versions of
16:
Tandy Radio Shack small-business computer launched in 1979
856:
Because you can get the same amount of software for each!
812:
1039:"Tandy Radio Shack enters the magic world of computers"
897:), and a 3GL "database" (Profile 16, later upgraded to
1632:. Vol. 6, no. 34. 1984-08-20. pp. 47–52
434:
The disk format on the Model II closely followed the
1816:. Vol. 9, no. 8. pp. 132–135, 400–409
613:
The Model II was provided with an implementation of
2092:
2076:
1975:
1869:
1549:"Radio Shack: set apart from the rest of the field"
901:16+), as well as an accounting suite with optional
695:
689:
674:
647:
626:
257:
249:
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229:
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176:
158:
148:
138:
49:. Unsourced material may be challenged and removed.
1705:"1986 Radio Shack Computer Catalog RSC-15 page 19"
1542:
1540:
412:drives were used for the floppy expansion module.
1577:"1983 Radio Shack Computer Catalog RSC-8 page 10"
1347:"1982 Radio Shack Computer Catalog RSC-6 page 34"
1321:"1982 Radio Shack Computer Catalog RSC-6 page 32"
1270:"1982 Radio Shack Computer Catalog RSC-6 page 35"
1244:"1981 Radio Shack Computer Catalog RSC-4 page 26"
1205:"1983 Radio Shack Computer Catalog RSC-8 page 10"
1165:"1982 Radio Shack Computer Catalog RSC-7 page 30"
930:with 256 KB in July 1983, and later in 1985, the
450:and the floppy controller required a terminating
315:Tandy was surprised at the strong demand for the
1512:
1510:
1193:. Fort Worth, TX: Radio Shack. 1980. p. 75.
836:processor and memory card, keeping the original
1448:
1446:
1444:
1000:
998:
847:
712:format. The ERASE command is used to clear all
605:; MSRP in the company's own stores was higher.
589:to it). In 1981, the 64K Model II computer was
1780:Barry, Steve; Jacobson, Randy (January 1984).
1293:
1291:
1096:. Vol. 3, no. 17. pp. 51, 53–54
1847:
1480:
1478:
286:The Model II was succeeded by the compatible
8:
1423:"Radio Shack Computer Catalog RSC-10 page 6"
496:codes 128-158) for drawing lines and boxes.
188: (equivalent to $ 16,370 in 2023) (64KB)
183: (equivalent to $ 14,480 in 2023) (32KB)
121:
1769:. Vol. 9, no. 18. pp. 1, 85.
1526:(editorial). September 1982. pp. 16–17
1032:
1030:
601:by mail-order from Radio Shack's dealer in
539:chips and a revised bank-switching scheme.
1966:
1960:
1854:
1840:
1832:
1761:"Tandy to Sell Laser Printer, 80386 Micro"
1740:. Vol. 7, no. 10. pp. 28–29
1191:TRS-80 Model II Technical Reference Manual
1015:. Vol. 3, no. 17. pp. 44–45
949:. By 1988, Radio Shack had begun offering
127:
120:
1677:"Tandy introduces the Model 16B computer"
807:The Model II was replaced in 1982 by the
688:). Model II BASIC supplies the functions
542:A special-purpose expansion card was the
109:Learn how and when to remove this message
1661:. Vol. 6, no. 15. p. 11.
1653:"Radio Shack release multiuser software"
1047:. Vol. 10, no. 11. p. 292
1007:"A Look at Radio Shack's Five Computers"
994:
2164:Computer-related introductions in 1979
1557:. Vol. 4, no. 26. p. 36
1125:. Vol. 3, no. 17. p. 54
849:Why is a Model 16 like a bowling ball?
507:machine in that it featured a passive
1685:. Vol. 5, no. 30. p. 1
1088:"Radio Shack Prepares for the Future"
7:
1463:. Vol. 5, no. 6. p. 3
730:Missing from Model II BASIC are the
574:. It could hold an additional three
47:adding citations to reliable sources
1651:David Needle, ed. (April 9, 1984).
1485:Vose, G. Michael (September 1982).
771:compilers, as well as its MACRO-80
333:. The base single disk version was
1759:Spiegelman, Lisa L. (1987-05-04).
14:
1947:Tandy 10 Business Computer System
1782:"The TRS-80 Model 16B with Xenix"
1401:Daneliuk, Tim (August 22, 1983).
363:Centronics-standard parallel port
2123:
2122:
1382:. CW Communications. p. 133
1303:"The Model II—Time for Support?"
23:
1115:Freiberger, Paul (1981-08-31).
1086:Freiberger, Paul (1981-08-31).
1005:Hogan, Thom (August 31, 1981).
861:Joke told at Tandy headquarters
503:The Model II was similar to an
500:characters were not available.
34:needs additional citations for
2110:Tandy Video Information System
1806:Hinnant, David F. (Aug 1984).
926:The Model 16 evolved into the
751:merged into the FRE function.
337:, and a four disk version was
1:
1487:"DOS woes erode Tandy's lead"
759:Microsoft made available its
1732:"Tandy Revamps Product Line"
1709:Radio Shack Catalogs dot com
1581:Radio Shack Catalogs dot com
1547:Markoff, John (1982-07-05).
1427:Radio Shack Catalogs dot com
1351:Radio Shack Catalogs dot com
1325:Radio Shack Catalogs dot com
1274:Radio Shack Catalogs dot com
1248:Radio Shack Catalogs dot com
1209:Radio Shack Catalogs dot com
1169:Radio Shack Catalogs dot com
1037:Ahl, David (November 1984).
525:network interface controller
1808:"Benchmarking UNIX Systems"
1730:Bartimo, Jim (1985-03-11).
755:Other programming languages
567:text adventures would run.
283:Model I, but a new system.
164:; 44 years ago
2180:
1675:Mace, Scott (1983-07-25).
1612:. Vol. 2, no. 1.
1602:Fastie, Will (June 1983).
1453:Chin, Kathy (1983-02-07).
891:office automation software
578:disk drives or up to four
544:64K Memory Expansion Board
2118:
1958:
551:WD 1791 floppy controller
406:WD 1791 floppy controller
261:14 x 21 1/4 x 23 1/2 inch
126:
2149:Z80-based home computers
1372:Hawkes, Jim (May 1983).
920:Model 16B and Tandy 6000
593:and the "primary unit"
2084:Tandy Graphics Adapter
864:
1899:Tandy Pocket Computer
1894:TRS-80 Color Computer
783:Applications software
421:Keytronic Corporation
237:500k 8" floppy drive
43:improve this article
2128:RadioShack template
1711:. Tandy/Radio Shack
1583:. Tandy/Radio Shack
1429:. Tandy/Radio Shack
1353:. Tandy/Radio Shack
1327:. Tandy/Radio Shack
1276:. Tandy/Radio Shack
1250:. Tandy/Radio Shack
1211:. Tandy/Radio Shack
1171:. Tandy/Radio Shack
947:orphaned technology
742:statement, and the
417:capacitive keyboard
415:The keyboard was a
275:system launched by
253:Detachable keyboard
123:
2021:Mera-Elzab Meritum
1788:. pp. 288–320
1604:"The Graphical PC"
1044:Creative Computing
972:Creative Computing
597:hard disk another
429:Cherry Corporation
177:Introductory price
2136:
2135:
2105:Tandy Corporation
1879:Model I & III
1374:"Model 12 Review"
1117:"Tandy's Outlets"
874:VisiCalc for the
704:division and the
609:BASIC interpreter
489:composite monitor
402:floppy controller
265:
264:
162:October 1979
153:Personal computer
143:Tandy Corporation
119:
118:
111:
93:
58:"TRS-80 Model II"
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2126:
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1987:Original TRS-80
1970:
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1936:TRS-80 Model 100
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983:
928:TRS-80 Model 16B
869:
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744:PEEK, POKE, INP,
741:
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27:
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2139:
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2132:
2114:
2088:
2072:
2027:Color Computer
1981:related systems
1980:
1971:
1965:
1956:
1888:TRS-80 Model II
1865:
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1301:(August 1982).
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884:UNIX System III
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830:TRS-80 Model 16
824:
809:TRS-80 Model 12
805:
785:
777:macro assembler
757:
747:
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735:
731:
714:array variables
706:modulo operator
696:
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615:Microsoft BASIC
611:
603:Perry, Michigan
598:
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579:
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571:
532:bank-switchable
521:disk controller
394:bitmap graphics
376:except a small
347:
338:
334:
313:
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288:TRS-80 Model 12
269:TRS-80 Model II
203:Microsoft BASIC
185:
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133:TRS-80 Model II
122:TRS-80 Model II
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2159:Microcomputers
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1883:TRS-80 Model 4
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1305:. 80 Remarks.
1287:
1261:
1235:
1231:Microcomputing
1222:
1196:
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1136:
1107:
1078:
1058:
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993:
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951:IBM-compatible
921:
918:
866:At a price of
858:
834:Motorola 68000
823:
820:
804:
801:
784:
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756:
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610:
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355:numeric keypad
346:
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317:TRS-80 Model I
312:
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233:Singled-sided
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1942:Tandy 1400 LT
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1518:"Proof Notes"
1513:
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1507:
1495:. p. 300
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1411:. p. 50.
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1072:Computerworld
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498:Reverse video
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74:
70:
67:
63:
60: –
59:
55:
54:Find sources:
48:
44:
38:
37:
32:This article
30:
26:
21:
20:
2077:Technologies
2046:CP 400 COLOR
2036:Dragon 32/64
2006:Colour Genie
1952:TRS-80 MC-10
1887:
1818:. Retrieved
1811:
1801:
1790:. Retrieved
1785:
1775:
1764:
1754:
1742:. Retrieved
1735:
1725:
1713:. Retrieved
1708:
1699:
1687:. Retrieved
1680:
1670:
1662:
1656:
1646:
1634:. Retrieved
1627:
1618:
1607:
1597:
1585:. Retrieved
1580:
1571:
1559:. Retrieved
1552:
1528:. Retrieved
1521:
1497:. Retrieved
1490:
1465:. Retrieved
1458:
1431:. Retrieved
1426:
1417:
1406:
1396:
1384:. Retrieved
1377:
1367:
1355:. Retrieved
1350:
1341:
1329:. Retrieved
1324:
1315:
1309:. p. 8.
1306:
1299:Green, Wayne
1278:. Retrieved
1273:
1264:
1252:. Retrieved
1247:
1238:
1225:
1213:. Retrieved
1208:
1199:
1190:
1185:
1173:. Retrieved
1168:
1159:
1148:
1139:
1127:. Retrieved
1120:
1110:
1098:. Retrieved
1091:
1081:
1070:
1061:
1051:February 26,
1049:. Retrieved
1042:
1019:February 28,
1017:. Retrieved
1010:
978:
977:
970:
964:
963:
943:
940:
931:
927:
925:
923:
915:
888:
880:
865:
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848:
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827:
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806:
786:
758:
729:
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612:
569:
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555:
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543:
541:
529:
518:
502:
470:
466:
462:subdirectory
445:
433:
414:
398:
367:video memory
361:ports and a
348:
314:
299:
295:
291:
287:
285:
268:
266:
159:Release date
139:Manufacturer
105:
96:
86:
79:
72:
65:
53:
41:Please help
36:verification
33:
2066:Matra Alice
2001:Video Genie
1991:Aster CT-80
1890:/12/16/6000
1820:23 February
1715:December 2,
1689:11 February
1609:PC Magazine
1587:December 2,
1561:10 February
1499:11 February
1433:December 2,
1357:December 2,
1331:December 2,
1280:December 2,
1254:December 2,
1215:December 2,
1175:December 2,
788:Wayne Green
673:instead of
595:8.4 MB
558:Scott Adams
440:soft sector
425:dry-rotting
378:boot loader
322:Radio Shack
2143:Categories
2100:RadioShack
1931:Tandy 3000
1926:Tandy 2000
1921:Tandy 1000
1792:2021-11-06
1744:21 January
1530:2020-10-13
1467:31 January
1129:26 October
1100:26 October
989:References
932:Tandy 6000
872:killer app
457:terminator
327:mainframes
311:Background
300:Tandy 6000
298:, and the
258:Dimensions
245:80x25 text
69:newspapers
1766:InfoWorld
1737:InfoWorld
1682:InfoWorld
1658:InfoWorld
1629:InfoWorld
1554:InfoWorld
1460:InfoWorld
1408:InfoWorld
1229:Kilobaud
1122:InfoWorld
1093:InfoWorld
1012:InfoWorld
966:InfoWorld
960:Reception
936:terminals
895:Multiplan
868:US$ 4,999
813:Model 16B
773:assembler
710:tokenized
580:8.4
561:Adventure
509:backplane
448:hard disk
339:US$ 6,599
335:US$ 3,450
296:Model 16B
186:US$ 3,899
181:US$ 3,450
2093:See also
2051:Color 64
1523:80 Micro
1492:80 Micro
1386:July 17,
1379:80 Micro
1307:80 Micro
911:Informix
876:Apple II
859:—
822:Model 16
803:Model 12
797:VisiCalc
793:Scripsit
640:position
477:Motorola
452:resistor
436:IBM 3740
419:made by
345:Hardware
306:Model II
292:Model 16
273:computer
99:May 2023
2041:MX-1600
2031:CD-6809
1636:May 26,
899:filePro
761:Fortran
702:integer
599:$ 4,040
591:$ 3,350
572:US$ 370
565:Infocom
390:CP/M-80
242:Display
235:Shugart
230:Storage
217:@ 4 MHz
169:1979-10
167: (
83:scholar
2154:TRS-80
2016:Max-80
1996:LNW-80
1977:Clones
1877:TRS-80
1870:Series
365:. The
359:RS-232
281:TRS-80
222:Memory
199:TRSDOS
85:
78:
71:
64:
56:
2056:VC 50
2011:D8000
982:'
907:Unify
903:COBOL
843:Xenix
769:BASIC
765:Cobol
697:OCT$
691:HEX$
676:PRINT
649:PRINT
628:PRINT
505:S-100
494:ASCII
277:Tandy
271:is a
250:Input
90:JSTOR
76:books
1938:/200
1914:PC-3
1909:PC-2
1904:PC-1
1822:2016
1813:BYTE
1786:BYTE
1746:2015
1717:2022
1691:2015
1638:2011
1589:2022
1563:2015
1501:2015
1469:2015
1435:2022
1388:2020
1359:2022
1333:2022
1282:2022
1256:2022
1217:2022
1177:2022
1150:BYTE
1131:2016
1102:2016
1053:2011
1021:2011
979:BYTE
909:and
828:The
767:and
748:OUTP
746:and
736:PSET
734:and
694:and
537:DRAM
475:and
386:CP/M
371:BIOS
267:The
215:Z80A
149:Type
62:news
954:386
838:Z80
740:CMD
732:SET
685:125
513:PCB
473:RCA
410:CDC
382:I/O
374:ROM
351:DMA
329:or
210:CPU
45:by
2145::
1810:.
1784:.
1763:.
1734:.
1707:.
1679:.
1655:.
1626:.
1606:.
1579:.
1551:.
1539:^
1520:.
1509:^
1489:.
1477:^
1457:.
1443:^
1425:.
1405:.
1376:.
1349:.
1323:.
1290:^
1272:.
1246:.
1207:.
1167:.
1147:.
1119:.
1090:.
1069:.
1041:.
1029:^
1009:.
997:^
763:,
716:.
667:20
582:MB
576:8″
523:,
485:IF
483:,
481:RF
396:.
341:.
302:.
294:,
290:,
201:,
1979:,
1855:e
1848:t
1841:v
1824:.
1795:.
1748:.
1719:.
1693:.
1640:.
1591:.
1565:.
1533:.
1503:.
1471:.
1437:.
1390:.
1361:.
1335:.
1284:.
1258:.
1219:.
1179:.
1133:.
1104:.
1055:.
1023:.
682:,
679:@
670:)
664:,
661:2
658:(
655:,
652:@
643:)
637:(
634:,
631:@
171:)
112:)
106:(
101:)
97:(
87:·
80:·
73:·
66:·
39:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
