We offer a complete inventory of Atari TT Computer repair / replacement parts (down to component level, Switches, I.C. Chips, ST Mouse parts, plastics....) as well as complete computers and replacement Motherboards.   Not all of the hundreds of different Atari TT computer replacement parts we carry are listed here.  If you do not see the Atari TT  part or items you are looking for see the Best Rev. 10 Catalog or E-Mail us at bestelec@bestelec.digitalspacemail8.net 

TT030 Computer 68030 

CB102970-4   Reconditioned Atari TT030 Computer 110 - 220V Auto switching) with 40 Meg Hard Drive, 4 Meg ST Ram, QWERTY Keyboard/Keyboard Cable, 720K Disk Drive, English Owners Manual, 110V Power Cord and STM1 Mouse. Out of stock

Reconditioned / Upgraded Atari PAL TT (white case) external Keyboard with keyboard cable.  Most, but not all of these used Atari keyboards, came right out the Atari Sunnyvale Corp. main headquarters.  Best got the rights to purchase all Atari items / goods out of the Atari headquarters building when Atari was shutting down.  Most of these Atari external keyboards were just laying around the different Atari departments because some of the key functions had started to fail and had been replaced with a new one from Atari inventory.  The close to 100% failure rate stock Atari MegaSTE / TT internal keyboard mylars have been replaced with the New Best Upgraded / Lifetime keyboard mylar.  Basically the only difference between an US and PAL (about 6+ International Country specific version keyboards) is the Atari PAL versions have a smaller length left shift key cap with a PAL key cap to the right next to it.  Also the International version MegaSTE / TT key caps markings that are International Country specific, like the UK Pound (money) symbol on the #3 key cap.  When used on a US Atari MegaSTE / TT computer, they will operate like a normal US keyboard.  What turns on the International different key cap functions / displays on monitor screen on the MegaSTE / TT Keyboard functions is the different International Atari ST Language disks or International Atari TOS versions used to 1st set up the MegaSTE / TT hard drive.  If your are a touch typist, the different International keycap symbols will not make a difference.  Best officially sold out of all Atari MegaSTE / TT external Keyboards close to 10+ years ago.  We were recently breaking down one of the thousands of pallets of Atari goods we got out of the local Sunnyvale Atari warehouses years ago and find the small cache of used Atari MegaSTE / TT keyboards.   CB102099-RE  $269.95

TT Keyboard Clear Keyboard Protector / Overlay for your TT keyboard. This clear, flexible skin covers your TT keyboard but lets you See and Type through it. Used to protect your keyboard from dust, liquids, metals and small items that could fall into your TT keyboard and damage it.  CB102128    $19.95

Manuel R. of Spain  Manuel contacted Best looking for a replacement Impossible to find PAL MegaSTE internal Keyboard Mylar (Atari made one has a close to 100% failure rate) for his Atari Midi Studio.  The Best Exclusive better made NTSC and PAL MegaSTE / TT Keyboard replacement mylars have a Zero Failure rate based on selling them for the last 15+ years to world wide Atari MegaSTE / TT owners.  "I have already received the Atari Keyboard Mylar. All perfect. Superb packaging!  Thanks for the information of your products.  A greeting from Spain and thank you for everything."

TT Replacement Coiled Keyboard Cable.  Replacement cable is 1 foot longer than stock Atari cable coiled / compressed, stretched out it measures 9 3/4 feet long and has 13 inches of straight cable on computer side and 2 feet of straight cable on the keyboard side, Gray in color.  This TT keyboard cable has the RJ-12 phone jack connector on one end of the cable only.  CB102055  $15.95


TT / MegaSTE Internal US Keyboard Mylar.  Best sold out of the Best upgraded replacement very popular Atari Keyboard mylar about 10+ years ago.  We were recently breaking down a pallet of Atari goods we put away 15+ years ago and have not even touched that pallet since then.  In one of the old Atari boxes we found a small stash of these new Best US keyboard upgraded keyboard mylars.  All of sudden, our 39+ year Atari Super tech remembered he had stashed away those mylars for his Atari Tech area back then and completely forgot about them.   He said we were selling them so fast, he was worried we would sell out of them soon back then.  This is a Best made Upgraded / Better made replacement MegaSTE / TT Keyboard Mylar with a new Silkscreened protective circuit trace safety top covering (compared to the Mitsumi made keyboard mylars with exposed circuit traces that crack all of the time) and 2 extended circuit traces connecting lengths (compared to the 2 stock Keyboard connection mylar strip lengths) so in the future if the ends of the connecting strip circuit traces wear off, you can trim off the end of the 2 connecting strips to expose new fresh connecting circuit traces.  This is an upgrade feature Best has been put on just about every Atari upgraded replacement Keyboard Mylar we have made for the last 35+ years.  Replaces Atari stock TT / MegaSTE Mylar internal part number 56B625A that always fails on the ESC key function and many more on the left side of the  TT / MegaSTE external Keyboard key caps functions.  CB102045  $49.95    Limit 2 total


TT Internal PAL QWERTY, QWERTZ, AZERTY Keyboard Mylar.  This is a Best made Upgraded / Better replacement TT Keyboard Mylar with protective Silkscreened circuit trace covering and extended Keyboard connection mylar strips.   Replaces Atari TT Keyboard Mylar internal part number 56B625B  CB102129  $39.95


Davis Q. of Italy  Davis ordered one of Bests Custom made Upgraded / Enhanced internal replacement TT keyboard Mylars.   "I will able to fix the TT keyboard giving it the right functionality :) Having the ESC and CTRL on Atari Unix will be an improvement!  I just received the item and it works great!  Able to use keyboard and its ALL keys.   Thank you!"


TT 68030 32 MHz Processor Plug in Daughter Board. This Atari Daughter / Adapter board Plugs into existing TT PGA MPU processor socket and has a twin lead wire harness to the 32 MHz crystal (requires soldering) on the TT mother board.  C301765    CALL




















Close up view left back corner of the Prototype TT ST 2 MB Ram Card.









99.9% of Atari TT Owners have never seen the 1989 Atari Engineering prototype 2 Meg ST plug in card (left card).  It is about 3/4 of the size of the Final Atari production run (right card) of the Atari 2 MB TT ST plug in Ram Cards.  Best has several Atari early Prototype Atari TT motherboards that this smaller Atari Prototype 2 MB ST ram cards fit onto.   The early versions of the Atari TT 2 MB cards had socketed Ram chips.   The final Atari TT production run of the TT ST 2 MB plug in ram cards used SMT Ram chips (card above).  It is possible for a very very good TT Atari Tech to convert the Atari 2 MB ST plug in socketed ram cards over to an Atari TT 8 MB Ram card.  A couple of unused legs off the surface MMU chip connected up the the ram chips leads on the bottom side of the PCB and 16 plug in 1 Meg dip chips.  Our 39+ year Atari Super tech has converted over 5 to 7+ stock Atari TT 2 MB plug in ram cards to 8 MB TT plug in Ram cards in the past.  Best still has a few of the Atari TT 2 MB socketed plug in ram cards in stock.  These Prototype TT 2 Mb plug in ram cards came right out of the Atari Engineering lab at Atari Corp headquarters.  Best got the rights to buy all of the Atari hardware left in the Atari Corp headquarters when they closed that Atari Sunnyvale Building down.


Atari TT Plug in 2 MB ST  ram card  CB102137 $135.00

Stefan B. of Germany   On his 1st International Atari order to Best, Stefan ordered a new Atari TT 2 meg plug in ST expansion card.  "The RAM Card did arrive and everything works perfect.  The customs was no problem, good work.  Iím glad to have ordered from you!"

Atari TT 4 - 16 Meg Fast Ram Upgrade Board  Uses 4, 1 Meg by 8 SIMMs OR 4, 4 Meg by 8 SIMMs (both 32 pin type). This plug in Atari 4/16 Meg upgrade board has the extra feature that allows to set Burst and Non Burst Modes of operation and can be configured in 4 Meg or 16 Meg configurations of TT Fast Ram via on board jumpers. 4/16 Meg Atari Fast Ram Upgrade board Without SIMMs.CB102139 $150.00TT 64 Meg TT Fast Ram Upgrade Board. This 64 Meg Plug in Fast Ram card uses the Industry standard 72 pin Micro Channel PC type SIMMs (Maximum. 2 SIMMs). This TT compatible Fast Ram Card can con-figured to take two each 4 (8 Meg Total) - 32 (64 Meg Total) Meg SIMMs. CB102610   $150.00

At the end of the Atari TT Computer life cycle (after Atari stopped producing them), Atari TT Computers were used in another commercial application.  If you are old enough to remember when those free standing kiosks / stands 1st started to show up shopping malls, one of those kiosks would custom Embroider T shirts and hats while you waited.  In a percentage of those sales kiosks across the US, used an Atari TT Computer to control the Custom Embroidering machine.  That Embroider company that used Atari TT computers was located in Texas.

Program Design Techniques for the Atari ST by Paul Overaa.

Paul Overaa has been programming in Basic, C and Assembler for nearly two Decades.  He has worked with hundreds of computers including Atari, Commodore and Apple. In this book he has focused his attention on the Atari ST computer.

Subjects covered include:

361 page wire spiral bond book  CB102103  $29.95














The Atari STM1 Gray Original Atari ST mouse shipped with the Atari TT Computers (some TT's were shipped with a white version, no longer available).  CB101505 $79.95








Best Electronics TrueMouse, Replacement Mouse for the Atari STM1 Stock Mouse.  The TrueMouse has been our bench mark Replacement ST mouse for over 15+ years now.  Thousands of World Wide Atari TT owners have found, once you switch over to a Best ST TrueMouse, you will never go back to the Stock Atari STM1 mouse ever again.  Same over all physical size as the stock Atari STM1 mouse except a slightly lower and more comfortable profile with a back end of the mouse which is round in shape Not square with sharp corners!, Extra Wide Left and Wide Right mouse switch covers similar to the stock Atari mouse so it will fit all size hands and also has a tactical raised lip between the Left and Right switch covers, Extremely Positive Feeling Industrial Grade Micro / Mouse switches which are rated at a minimum of 1,000,000 operations per switch with only 120 grams operating force, Tracking resolution of 200 DPI, Opto-Mechanical Encoder Design, 5 1/2 Foot mouse cord, replacement TrueMouse parts available from Best and FCC Class B Approved. CB102079 $49.95






Dewey K. of WI  Dewey ordered a new Best Mega 2 replacement Keyboard cable to replace the used one that was in bad shape on his just received Atari Mega 2 computer.  He also ordered a new Best ST True mouse.  "WOW!!  I am very happy with the service I have received. You answered my questions, helped me through the ordering process, and shipped my order quickly.  The keyboard cable is a great replacement for the old one.  I really like the TrueMouse.  Ití much better than the Atari mouse!"

Atari STM1 Rebuild Kit.  Rebuild your order worn out Atari STM1 mouse and keep it as a back up ST mouse.  Kit includes, a new Atari OEM STM1 Mouse cable, two new Internal Atari Mouse switches, four better than stock Best's thicker STM1 Mouse new Teflon replacement feet and new a mouse ball.  Over the years Atari had about 5 to 7 different manufactures make the same STM1 mouse for them.   Each version mouse looks the same from the outside but differs on the inside and bottom locking plate construction.  All STM1 rebuild kits require ability to unsolder and solder in the replacement new mouse switches and one case the cable too.  To configure the correct Atari STM1 Rebuild kit for your exact version old STM1 mouse.  We need the following questions answered from you:

1.  Where your STM1 mouse was made (one version, does not have a country listed).  Usually listed on bottom label?

2.  Do you have slide and snap in or Round twist and lock mouse ball locking plate?

3.  Do you have Steel, Brass or Plastic internal Ball contact rollers?

4.  Size of your STM1 Mouse ball, 22 mm (3/4 inch) or 25 mm (1 inch) Diameter?

5.  Size of your SMT1 Mouse Internal Switches, 1/4 or 3/8 inch square?

6.  Internal STM1 Mouse cable female (and the Male mating) connector Color, Tan, White, Black or in one case wires soldered directly to the STM1 mouse PCB board?

Best STM1 Rebuild Kit.  CB101398  $26.95

Also in stock for the Atari STM1 mouse, Bottom Mouse Ball Locking plates, Internal sets of Photo Optics (matched set of 8) and SMT or Dip version LM339 I.C.

Best's STM1 Mouse new Teflon replacement feet with adhesive backing.  These Best designed and produced upgraded Atari STM1 replacement mouse feet (very light off white to light blue color), have a Teflon pad thickness about twice as thick, compared to the Stock made Atari STM1 OEM mouse feet.  In theory should last twice as long as the Original STM1 mouse feet.  CB101114  $5.00  per set of 4 feet


TT Atari Field Service Manual  Covers both style TT mother boards, 2 Meg and 2/8 Meg ST Ram Boards, 4 Meg and 4/16 Meg TT Fast Ram Cards. Sections covered, Introduction: Overview- Main Components-Case Design-Power Supply, Theory of Operation: Overview-Main System-Audio/Video Subsystem-Input/Output Subsystems-System Startup-System Errors-Functional Block Diagram, Testing: Overview/Test Equipment-Test Configuration-Troubleshooting a dead Unit-TT030 Diagnostic Cartridge-Error Codes, Disassembly/Assembly: TT030 Disassembly-TT030 Assembly, Symptom Checklist, Diagnostic Flowchart, Assembly Drawings, Schematics and PCB Silk-screen and Glossary. 121 pages total with 16 pages of Atari Schematics.  CB101672  $50.00

TT Diagnostic Cartridge, Rev. 1.5 18+ Diagnostic Tests. Ram, ROM, Color (requires TT compatible color monitor), Keyboard, Midi (re-quires loop back cable), Serial Port (re-quires shorting connectors), Audio, Timing, DMA Port (requires Loop back board and cable), Printer / Joy Ports (requires joy loop back + Printer cables with Loop back board) High Resolution (requires TTM194, TTM195), Real Time Clock, SCC (All Serial and LAN Ports), SCSI Bus, VME (requires Loop back cable), O.S., Hard Disk Read / Write Test with Park feature, Examine / Modify Memory, Set RS232 Rate, 50 / 60 Hz Video output Toggle, Internal tests Burn in tests, All Tests Burn in cycle, Floppy Disk Tests including Test Disk Speed, Quick Test, Install Disk drives, Check 80 - 82 Copy Protect Tracks, Read Alignment Disk, Disk Interchange Test, Disk Exerciser Tests also this TT Diagnostic Cartridge checks for current Keyboard I.C. Rev., TOS O.S. Version and Total ST and TT Memory present upon boot up. Cartridge only. CB102071  $50.00

Atari 520ST, 1040ST, Mega 1/2/4, Stacy, 1040STE, MegaSTE, TT and Falcon Computer Diagnostic Loop Test Hardware Test Kit 

When Atari set up a new US Atari ST Service Center Dealer, as part of the ST Dealer Service Center package (full set of ST Computer repair Manuals, ST Color and Monochrome Monitor manuals, 520ST/1040ST Diagnostic Cartridge), a new complete 520ST, (later) 520STFM and 1040ST Computers for parts) and this loop back ST Test kit.  The new Atari ST Dealer paid for ($,$$$+) for this complete Atari Service Center Hardware Package.  

This Atari ST Loop back test hardware is used with the many different Atari ST different Diagnostic Cartridges (520ST/1040ST/Mega, Stacy, 1040STE, MegaSTE, TT or Falcon Diagnostic Cartridges) to fully test all ST computer Internal and External hardware functions.  Extra port shorting hardware / plugs required for the 1040STE, MegaSTE, TT and Falcon computers to full run all of the extra Diagnostic Tests / Ports (extra features or different style ports of those model Atari computers). 

The two DB-9 black Joystick cables are connected up to the ST Joystick/Mouse ports and back to the Loopback green PCB (most ST computers require you to crisis cross (not one to one) these DB-9 shorting cables back to the loop back PCB to get the proper port diagnostic results).  The short black or gray DB-25 Parallel cable is connected to the ST printer port and loop backboard.  The short gray ST DB-19 DMA cable is connected to the ST DMA port and the loop backboard.  The 5 pin Din shorting cable is connected up to both ST Midi Ports (one end of this Midi cable has a Red LED molded into the translucent connector housing to see the Diagnostic Midi Send and Receive sent signals).  The DB-25 Serial port shorting connector is connected to the ST Modem / RS232 external Port.

Depending on the exact version Atari ST Diagnostic Cartridge used with the ST loop back hardware test board, you can choose from the ST Diagnostic display menu to run between different ST Diagnostic tests one at a time or our 27+ year Atari Super Techís standard 12 to 24+ hour continues Burn in loop that he tests all ST computers with.  Typical Atari ST Diagnostic tests you can run using the different Atari ST Diagnostic Cartridges and Loop back external Hardware, upon boot up displays ST TOS Rev., Total ST / TT Fast Ram, Keyboard I.C. Rev. level., 5 ST Ram Tests, 7 ST internal Chip set timing Tests, if present 14 Blitter chip tests, if present 2 Real Time Clock tests, Audio tests, OS ROM Test, 2 Printer Port I/O Tests, Color and Monochrome ST display tests, 3 Keyboard tests, 5 Mouse and Joystick port tests, 12 RS232 / Serial / Modem I/O port tests, 50 / 60 Hz display toggle, 17 Internal or External Floppy Disk Drives tests, 4 DMA I/O port Tests, 2 Parallel port I/O tests, 5 Midi Send and Receive Tests.  The best way to fully test and burn in any unknown condition or repaired Atari ST computer. 

Atari ST Loopback board, cables and shorting connector Kit.  CB102271 $59.00 

Atari Tech Tip on the Loopback ST PCB board.  Our Atari Super Tech strongly recommends you tape the anti Static pink bubble bag the Loopback board comes in (or tape a piece of thick and oversized piece of cardboard) to the exposed back side / solder side of the Loopback PCB board, to prevent it from shorting out / damaging the different I.C.ís on the top side of Loop back PCB should the back side of the exposed PCB come in contact with any metal.

TT Diagnostic Cartridge, Rev. 1.2.  This is an earlier version of the above Atari TT Diagnostic Cartridge. 17+ Diagnostic Tests. Ram, ROM, Color (requires TT compatible color monitor), Keyboard, Midi (re-quires loop back cable), Serial Port (requires shorting connectors), Audio, Timing, DMA Port (requires Loop back board and cable), Printer / Joy Ports (requires joy loop back + Printer cables with Loop back board) High Resolution (requires TTM194, TTM195), Real Time Clock, SCC (All Serial and LAN Ports), SCSI Bus, VME (requires Loop back cable), O.S., Examine / Modify Memory, Set RS232 Rate, 50 / 60 Hz Video output Toggle, ?Help, Internal tests Burn in tests, All Tests Burn in cycle, Floppy Disk Tests including Test Disk Speed, Quick Test, Install Disk drives, Check 80 - 82 Copy Protect Tracks, Read Alignment Disk, Disk Interchange Test, Disk Exerciser Tests also this TT Diagnostic Cartridge checks for current Keyboard I.C. Rev., TOS O.S. Version, 50 or 60 Hz operation and Total ST and TT Memory present upon boot up. Cartridge only.  CB102810   $39.95

TT LAN Port Shorting Plug For above TT Diagnostic Cartridge LAN Test.   CB102679   $15.00
TT Serial 1 + 2 and Modem 1 + 2 ports Shorting Plug. Four shorting plugs total required for above TT Diagnostic Cartridge, SCC / LAN Port Test.   CB102801   $8.00 ea.

Replacement Mother Boards

TT Main Mother Board, 16MHzLess all plug in chips with 2 Meg Ram.   CB101669 Out of stock
TT Main Mother Board 32MHzLess all plug in chips with 2 Meg Ram.   CB101669-32   Out of stock
TT Main Mother Board 16MHz, Fully Populated With 2 Meg Ram, Less TOS ROM’s.   CB101669-P   Out of stock
TT Main Mother Board 32MHz, Fully Populated With 2 Meg Ram, Less TOS ROM’s.   CB101669-P32   Out of stock

TT / Falcon R/A reset switch with gray cap




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