No.44 November-December 1988 $3.95 T H E M C R 0 T EC H N C A L J 0 U R N A L Object-Oriented Programming Objects are the latest buzz word. For a long time there was only Smalltalk, now there's a whole troup of players including Actor, Objective C and C++. So we start out this issue with a four-piece trilogy on objects: complete with theory, examples, and projects. (Space is no object.) A Taste of Smalltalk page 8 An intense look at messages, objects, classes, late binding, and all the other fancy terms that have grown up around this fascinating field. Actor, an Object-Oriented Language Thinking Objectively Building MicroCad A Special Project The Peripheral Technology-PT68K-2 page 42 An inexpensive, build-it-yourself, 68000 system. A great way to learn both hardware and software from the ground up. 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Reader Service Number 7 1955 Pauline Blvd., Ann Arbor, Ml 48103 (313)996-1299 • Telex701821 • Fax(313)996-1308 CompuView CASES& KEYBOARDS POWER SUPPLY 5339 Professional XT-AT 150 Watt Power Supply (XT) . 50.00 w I 12 function key .. .. .. .. .. .. 69.00 200 Watt Power Supply (AT) ....... 80.00 5060 Keyboard AT Style .............. 49.00 XT Slide Case .. .. .. .. .. .. .. .. .. .. .. .. .. 34.00 KB 101 Keytronic .. .. .. .. .. .. .. .. .. 6 7 .00 XT Slide with Lock & LED . 38.00 Focus 101 Key, Tactile, Switchable, STD AT or 80386 control caps lock, Dust cover . 89.00 w /Lock & LED...................... 65.00 -Chosen #1 Find hy Micro C Staff- Tower AT or 80386 w /Lock, LED 101 Key Click Style .................... 59.00 and Power Supply ................... 239.00 -All keyboards switchable to XT or AT- MONITORS HARD DRIVES EGA/CGA (Auto Switch, .31 dot) .... 395.00 & CONTROLLERS VGA/EGA/CGA Multi Sync c.31) ... 495.00 AT 40 MB Miniscribe 3650 (61 msJ ... 375.00 CGA Color ............................. .249.00 AT 40 MB Miniscribe 3053 (ZS ms) ...489.00 Amber 12" TTL .. .. .. .. .. .. .. .. .. .. .. .. 89.00 AT 71 MB Miniscribe 6085 c2s ms> ... 695.00 Green 12"' TTL.. .. .. .. .. .. .. .. .. .. .. 89.00 AT (MFM) Hard Drive & VGA Analog (Mitsubishi .28 dot) ..... 495.00 - Tower Case Pictured - floppy controller (WD) ............ 130.00 VIDEO CARDS KIT OPTIONS AT RLL HD & FD controller ....... 189.00 Color /Graphics/Parallel . 52.00 MS DOS 3.21 w/GW Basic ............ 49.00 XT20 MB Miniscribe 8425 (65 msl .... 2 79.00 Mono/Graphics/Parallel.............. 49.00 MS DOS 3.31 w /GW Basic ............ 95.00 with controller ....................... 340.00 *5339 Keyboard Sub ................... 24.00 XT30 MB Miniscribe 8438 (65 ms> .... 299.00 EGA, CGA, VGA (640x480) ....... 129.00 *Color Options: VGA Analog, STB Extra .............. 239.00 (Includes video card & monitor) with controller ....................... 355.00 CGA Color ......................... 200.00 EXPANSION CARDS CGA/EGA Color ................... 380.00 SOFTWARE Clock Card . 22.00 CGA/EGANGA Color ............ 450.00 MS DOS 3.21 w/GW Basic ......... 49.00 Dual Floppy Disk Controller . 25.00 ASSEMBLY AND TESTING Flight Simulator 3.0.................... 39.95 Game Port . 19.00 XT Systems. 60.00 AT/80386 Systems . 80.00 ACCESSORIES XT Multi-Function, 1 ser/par/clk/ Generic Analog Joystick............... 25.00 game/2 floppy ........................ 61.00 XT KIT WI 2 Floppy Drives. Gravis Analog Joystick . 49.95 Parallel (Supports LPT 1, 2 or3) . 18.00 Includes: 6401< RAM, Serial, parallel and game V20-8mhz ................................ 14.00 Dual Serial Port Card - 1 installed ports, clock/calendar, AT-Style keyboard, cabinet, 1200 Baud Internal . 79.00 switchable Com 1, 2, 3, or 4 ..... ; 22.00 power supply, mono graphics card and amber or green monitor. Keyboard switchable turbo. 2400 Baud Internal ..................... 119.00 Kit for 2nd Port .. .. .. .. .. .. .. .. .. .. 20.00 EPROM Programmer ( 4 gang) ....... 175.00 XT 640K RAM (0K installed)......... 35.00 8 mhz with lock, LED, Reset & Turboswitch . 825.00 Memory Chips ............ (call for prices) XT 2 MB Intel EMS (0K installed) ... 99.00 MICE XT I AT Multi l/O lOmhz with lock, LED, Reset & Turboswitch............. 895.00 Logitech 2 Button (serial)............. 59.00 Serial/Par /Game . 41.00 Logitech 3 Button (serial or bus)... 89.00 Kit for Second Serial.. .......... , . .. 30.00 XT KIT W /20MB Hard Drive. Logitech HiRez (bus) .................. 109.00 AT 2 MB Intel EMS (0K installed) ... 139.00 With mouse purchase only - DTK 4 MB 32 bit memory card lncludes: 6401< RAM, Serial, parallel and game ports, clock/calendar, AT-Style keyboard, cabinet, First Publisher .. .. .. .. .. .. .. 50.00 w/o RAM ............................. 139.00 power supply, mono graphics card and amber or Generic CAD 3.0 . 50.00 XT I AT Multi Drive Controller - green monitor. Keyboard switchable turbo. Paintshow ............................. 15.00 Supports 1.44, 720K, 1.2, 360K 8 mhz with lock, LED, Reset drives on XT or AT .. .. .. .. .. .. .. .. 54.00 & Turboswitch ........... 1095.00* Prices are subject to change without notice. lOmhz with lock, LED, Reset Shipping CHARGES will be~ MOTHERBOARDS & Turboswitch ........... 1165.00* XT/Turbo 4.77 /8 mhz ................ 89.00 *(For 30MB Miniscribe add $15.00) XT/Turbo 4.77 /lOmhz ............... 99.00 BUILDING YOUR AT 6/10 mhz Choice of Award, OWN CLONE V2.1 80386KIT- ****FREE BOOKLET**** Phoenix or DTK Bios ............... 2 79.00 Includes: lMB RAM, 1360K floppy drive, 1-1.2 *90-day warranty /30-day money back AT 6/12 mhz Choice of Award, MB FD, 1 40MB HD, DTK bios, switchable (subject to restrictions) Phoenix or DTK Bios ............... 340.00 keyboard, monochrome monitor, monographics. Serial/parallel ports, case, power supply, game Baby AT 6/12 mhz AMI Bios ......