THE PRACTICAL MAGAZINE FOR PERSONAL COMPUTERS & MICROCONTROLLERS Formerly 11M/ill MODERN December 1991 $2.95 1111111I ELECTRONICS (Canada $3.95) Capture A d Enhance, m.P.4.apg VCDO Build A Long -Distance Data Ko= Adding A Wireles9wAedio RC Out C-10 Z cm70 Le) el0ODrsJ Cr JUTCP* Z I-' r) 70 CO * C_) s.0 0 x o < 0- -L` Fly Air Combat With Chuck Yeager CO - o Pk - Experimenting With The Z8 Microcontroller 0 DC DC Co co 1991 Cumulative Article Index 1-800-ITS-DHUT FOR FINE QUALITY PRODUCTS UPGRADE YOUR IBM, 1-800-487-3488 (U.S. & CANADA) IBM COMPATIBLE OR TANDY COMPUTER FOR LESS MONEY! Wecarry over five thousand products - computers, peripherals, printers. If you don't see or can't find it call us, toll free!! EX/HX HARD DRIVE SYSTEMS Our Hard Cards come prefo matted . pre -tested. in Tandy/IBM computers. They include Our Hard Drive systems have been preformatted and pretested in Tandy EX/Hx computers. disk management and disk cache speed-up software. Also comes wtih many other free Disk management as well as speed-up software programs such as games. utilities and many software programs such as games. utilities and many others) These Hard Cards are easy to others' By simply removing the Ex /Hx adaptor our drives will plug into any normal install and can go from one machine to another Install in minutes. just plug in and go, (Please computer. Order the flash drive today and spend hours with the free software. specify if you own a Tandy. IBM or IBM compatible.) DH FlashDrive 21 Meg 39 ms 285.00 8BIT 16 BIT DH FlashDrive 32 Meg 39 ms 325.00 OH Lightcard 21 Meg 39 ms.. 229 00 DH Lightcard 21 Meg 29 ms .... 244.00 DH FlashDrive 42 Meg 28 ms 375.00 DH Lightcard 32 Meg 39 ms .... 245.00 DH Lightcard 32 Meg 39 ms .... 260.00 OH FlashDrive 50 Meg 28 ms 455.00 DH Lightcard 42 Meg 38 ms .... 280.00 DH Lightcard 42 Meg 28 ms .... 295.00 DH FlashDrive 68 Meg 22 ms 479.00 OH Lightcard 50 Meg 28 ms .... 329.00 DH Lightcard 50 Meg 28 ms .... 344.00 DH FlashOrive 85 Meg 28 ms 51500 DH Lightcard 68 Meg 22 ms .... 375.00 DH Lightcard 68 Meg 22 ms .... 390.00 MODEMS DH Lightcard 85 Meg 28 ms .... 425.00 DH Lightcard 85 Meg 28 ms .... 440.00 DH Lightcard 110 Meg 28 ms ... 685.00 DH Lightcard 110 Meg 28 ms ... 699.00 Our modems are Hays compatible. They come complete with communication software HARD DRIVES cable and everything you need to start communicating in minutes, 1200 BAUD Internal 52 00 Our Hard Drives are initialized. partitioned and formatted. Each drive is then tested for 2400 BAUD Internal 75 00 integrity. to ensure you get a first class product, Included with your drive you get disk 2400 BAUD External 115.00 management as well as speed caching software. Also included are many other programs 2400/48100 MNP 7 BAUD Modem 135.00 such as games, utilities and many many others. You will have hours and hours of enjoyment from your new hard drive and free software, FAX BOARDS Model Size Brand Speed Dimension BareXT/ Tandy 16 Bit Kit Comes complete with phone cord and software. Full five year warranty!, Kit Send FAX 4800 BAUD Int 95 00 ST225 21 M Seagate 48 ms 525 183 224 234 Send/Receive FAX, Plus Modem 9600 BAUD FAX/4800 Modem 135.00 ST125 21 M Seagate 28 ms 3.5 224 255 265 SPEED ENHANCEMENTS - KL320 21 M Kaiak 39 ms 3 5 144 196 206 ST238R 32 M Seagate 40 ms 52 193 237 257 Increase the speed of your computer by an overall 50% with this easy to install upgrade! ST138R 32 M Seagate 28 ms 35 226. 254 278 Installs in five minutes KL330 32 M Kalok 39 ms 3 5 163. 225 234. IBM XT or IBM XT Compatible 24 95 ST251 42 M Seagate 28 ms 525 237 286 295 Tandy 1000. 10130A. 1000 SX 24 95 ST151 42 M Seagate 24 ms 3 5 336 367 376 Tandy 1000 SL 1000 SL /2 34.94 SN2040 42 M Samsung 35 ms 35 197 257 267 Tandy 1000 EX, 1000 HX . ........ .... 29 95 MR535 42 M Mitsubichi 28 ms 525 256 307 318 PC Sprint Increases CLK SPD Tandy 1000. 1000A IBM XT IBM XT Compatible ... 7495 KL343 42 M Kalok 28 ms 3 5 234 N/A 254 EXPANDED MEMORY BOARDS CP3044 42 M Conner 28 ms 35 286 N/A 315 WD2044 42 M Western Digrta118 ms 1 0 294 N/A 325 These boards work in Tandy and XTs and include LIM 3 2 8 Bit. ST157R 48 M Seagate 28 ms 3.5 266 316 326 Board with OK 139 00 ST157A 48 M Seagate 28 ms 3.5 235. N/A 287. Board with 256K 175,00 PT1357R 48 M PTI 28 ms 3.5 257. 314. 334. Board with 512K 199 00 MK134A 68 M Toshiba 22 ms 3.5 307. 356. 375. Board with 1 MEG 215 00 ST1277R 62 M Seagate 28 ms 5.25 257. 304. 326. Board with 1.5 MEG 235.00 MR535R 65 M Mitsubichi 28 ms 5.25 285. 316. 327 Board with 2 MEG 285.00 MC8085 85 M Microscience 40 ms 5.25 326 387. 424. Board with 4 MEG 540.00 ST296N 85 M Seagate 28 ms 5.25 317 356. 385. ST1096N 85 M Seagate 28 ms 3.5 394. 455 486. FLOPPY DRIVE FOR TANDYS MX7080A 80 M Maxtor 19 ms 1.0 384. N/A 397. These floppy drives will install in minutes. Add a high density drive to your computer for ST1125N 111 M Seagate 19 ms 3.5 694 724. 754. less money! High density drives include controller card, cables. everything you need to make MK235 107 M Toshiba 22 ms 3.5 486. N/A 515. you start running' R3428A 107 M Rodime 18 ms 3.5 457 N/A 486 360K Internal Drive Kit 67.00 VGA ENHANCEMENT 720K Internal Drive Kit 70 00 1.2 Meg Internal Drive Kit 139.00 Ready for VGA Upgrade the Data Hut Way) Full replacement warranty, 1.44 Meg Internal Drive Kit 145.00 VGA Combo T 14, 28 DP. 640 x 480. 256 K, 8 Bit 386 00 360K Internal Kit for Ex/Hx 125/00 VGA Combo II- 14. 28 DP, 640 x 480. 512 K. 16 Bit 425 00 720K Internal Kit for Ex /Hx 125 00 VGA Combo III14. 28 DP. 1024 x 768, 512 K. 16 Bit 455 00 VGA Combo IV14. 28 DP. 1024 x 768, 1024 K, 16 Bit 515.00 MATH COPROCESSORS The speed will amaze you, Seagate Drives all Models Tandy 1000, 1000A Microscience Drives all Models CALL Tandy 1000SX. SL. SL /2 12805.1 Toshiba Drives all Models CALL Tandy 1000TL. TL /2. TL /3 140.00 Western Digital all Models CALL 80287-10 139.00 Kalok all Models CALL 80387SX-20 379.00 Maxtor Drives all Models CALL 80387-20 422 00 Conner Drives all Models CALL Rodime Drives all Models CALL SYSTEM MEMORY UPGRADES Micropolis Drives all Models CALL D 5X Upgrade Tandy EX or MX to 640 IDE Drives all Models CALL 174.00 CALL DH 10X Upgrade Tandy SX. EX or FIX from 384 to 640 42 00 Call our factory -trained sales and tech support staff, and let them help you find the best DH 20L Upgrade SL or SL /2 from 384 to 640 45 00 drive for your computer system DH 3TX Upgrade any TX from 640 to 768 29.00 DH 4TL Upgrade TL or TL /2. TL /3 from 64010 768 #6 North Court Street DH 5NL Upgrade 3000 NL to 640 DH 6RL Upgrade Tandy 1000 RL. 1000RLX from 640 to 1 Meg 29423901 Owingsville, KY 40360 DH 100 Upgrade Tandy 1000 or 1000A from 128 to 640 235.00 LOCAL 606-674-3916 D 120 Upgrade Tandy 1200 from 256 to 640 200.00 OH IBM Upgrade IBM PC/XT FRP 256 to 640 ......... DATA FAX 606-674-3917 CALL US FOR ANY OF YOUR RAM UPGRADE NEEDS. WE WON'T BEUNDERSOLD?2°0 8° TOLL FREE 1-800-487-3488 -HUT-HOURS: Mon. thru Sat. 9 a.m. to 8 p.m. E.S.T. r -r1 M WHY BUY FROM DATAHUT? No surcharge on credit cards. 30 Day Money -back Guarantee! 14 Month Warranty on all Products! High quality products and free technical support! Extended warranty available. Find a cheaper price & we'll beat it! WE WON'T BE UNDERSOLD! All Pricing & Availability subject to change without notice. C.O.D. & Purchase Orders Accepted! THE PARTS PLACE Special -Order Hotline. Your Radio Shack store can special -order over 10,000 items from our main warehouse-tubes, ICs, microprocessors, transis- tors, diodes, crystals, styli, computer accessories- even SAMS® service manuals. Range -Doubler Multitester. With extra resolution on V/A ranges plus 50,000 ohms -per -volt DC sensi- tivity. 125mV and 25 µA ranges. Continuity sounder. Measures to 1000 VDC in 12 ranges, 1000 VAC in eight ranges, 10 amps DC in 10 ranges, 20 megs in four ranges. #22-214 39.95 Digital Logic Probe. So handy! LEDs and tone outputs reveal logic states instantly. Check opera- tion and pinpoint problems in all types of digital circuits-TTL, LS and CMOS, memory, microcom- puter and peripheral ICs.