Sinclair  ZX 81  	    The Sinclair ZX 81 was the successor of the ZX 80, and can be regarded as an evolution of it.    The ZX80 could not handle floating point numbers or cassette data files, but the ZX-81 could. The ZX-80 had 4k ROM : the ZX-81 had 8K ROM with 30 additional functions and some instructions to drive the printer. Thanks to a higher level of integrations (the total number of chips in the basic system was 4, against the ZX80's 21), the ZX-81 cost 」30 less than the ZX-80.

The world's cheapest and worst computer. I taught people to use it for The Computer School.

Texas Instruments  TI 99 / 4A  	    The Texas Instrument TI 99/4A was a very succesful computer. A large number ROM cartridges (36 KB each) were developped for this computer, as the popular Extended Basic.    Up to seven peripherals could be connected : 32 KB RAM extension, RS232c, Disk controler (90 KB per disk, up to 3 disk-drives), speech synthetiser, Peripheral Expansion box...

The Texas Instrument TI was a very succesful computer. A large number ROM cartridges KB each) were developped for this computer, as the popular Extended Basic. 16 bit processor running at MHz.

AVT ELECTRONICS  Comp 2  	    This is quite a rare computer ! It was conceived by a dutch company called AVT Electronics. AVT is short for Alex van Tienhoven, then the owner of the company. This computer was made in Korea as per AVT's design...    This obscure system is Apple II compatible (hardware & software), hence the "Comp2" name.    The system is composed of a separate keyboard and a big case housing two 5''1/4 disk-drives, the mainboard and 8 expansion slots.

AVT ELECTRONICS Comp 2 This is quite a rare computer ! It was conceived by a dutch company called AVT Electronics. AVT is short for Alex van Tienhoven, then the owner of the company. This computer was made in Korea as per AVT's design... This obscure system is Apple II compatible (hardware & software), hence the "Comp2" name. The system is composed of a separate keyboard and a big case housing two 5''1/4 disk-drives, the mainboard and 8 expansion slots.

Tandy Radio Shack  2000  	    The Tandy 2000 was launched in December 1981, a full year BEFORE the 1000, and proved to be a mistake on the part of Tandy, but to their credit they weren稚 alone, many manufacturers who built systems based on the Intel 80186 CPU suffered the same fate.    On the surface the computer was quite the catch: The 典-2000� featured new instructions and new fault tolerance protection over the TRS-80 and COCO lines.

Tandy Radio Shack 2000 The Tandy 2000 was launched in December 1981, a full year BEFORE the 1000, and proved to be a mistake on the part of Tandy, but to their credit they weren稚 alone, many manufacturers who built systems based on the Intel 80186 CPU suffered the same fate. On the surface the computer was quite the catch: The 典-2000� featured new instructions and new fault tolerance protection over the TRS-80 and COCO lines.

SMT   SMT  Goupil 2  	    Goupil was the old french word for fox (renard). The Goupil was designed to be modular. It could be used as a home computer but its maim purpose was to be used in French schools in connection with other computers, or as a small server thanks to its built-in 300-baud modem.    The system was composed of a backplane used as a backbone to connect various cards: CPU card (a 6808 with 2 KB VRAM), RAM card (56 KB), disk controller, I/O card...

repair hacking clinton computer to enable vt x hacked hillary accessories computer system includes system software of a computer system systems inc

ADD-X Système  SMP-5  	    This is a french professional computer conceived by ADD-X Systèmes based at Blagnac (Toulouse).    It was a CP/M and MP/M compatible system, had 64k RAM, two 5''1/4 disk-drives and one 5 MB Winchester hard-drive. It could be expanded to a multipost configuration (up to 3 stations).    The following languages were available : Basic, Cobol, Fortran, Pascal, APL.

ADD-X Système SMP-5 This is a french professional computer conceived by ADD-X Systèmes based at Blagnac (Toulouse). It was a CP/M and MP/M compatible system, had 64k RAM, two 5''1/4 disk-drives and one 5 MB Winchester hard-drive. It could be expanded to a multipost configuration (up to 3 stations). The following languages were available : Basic, Cobol, Fortran, Pascal, APL.

Atari  1200 XL  	    The Atari 1200 XL was the predecessor of the Atari 600/800 XL. It had much of the same characteristics, except the size of its ROM (16 KB instead of 24 KB) the BASIC Interpreter being supplied on a cartridge. Because the built-in Operating System was not designed very well, people are known to have swapped the OS ROM chip from their 800XL & put in the 1200 XL.

The Atari 1200 XL was the predecessor of the Atari XL. It had much of the same characteristics, except the size of its ROM KB instead of 24 KB) the BASIC Interpreter being supplied on a cartridge.

Toshiba  PASOPIA  	    This is the first home-computer made by Toshiba and was quite powerful for 1981 : 64k RAM, 80 columns, 640 x 200 high resolution and large expansion possibilities.    There were two models : the PA7010 with the T-BASIC built-in, and the PA7012 with the OA-BASIC built-in.  The advantage of the OA-BASIC is that it can use indexed sequential access methods to handle files, and has an automatic load / run function for launching programs.

Toshiba PASOPIA This is the first home-computer made by Toshiba and was quite powerful for 1981 : 64k RAM, 80 columns, 640 x 200 high resolution and large expansion possibilities. There were two models : the PA7010 with the T-BASIC built-in, and the PA7012 with the OA-BASIC built-in. The advantage of the OA-BASIC is that it can use indexed sequential access methods to handle files, and has an automatic load / run function for launching programs.

Atari  1450 XLD  	    The Atari 1450 XLD has the same characteristics as the Atari 1400 XL.    Like the 1400 XL, it has a built-in modem (Bell 103 compatible, 300 baud) and the speech synthesiser chip (SC-02). Contrary to the other Atari, it uses a parallel disk drive controller (a much faster arrangement) instead of the SIO interface.    Apparently The 1450 was not released because they were having problems getting the parallel disk drive controller to work properly.

Atari 1450 XLD The Atari 1450 XLD has the same characteristics as the Atari 1400 XL. Like the 1400 XL, it has a built-in modem (Bell 103 compatible, 300 baud) and the speech synthesiser chip (SC-02). Contrary to the other Atari, it uses a parallel disk drive controller (a much faster arrangement) instead of the SIO interface. Apparently The 1450 was not released because they were having problems getting the parallel disk drive controller to work properly.

AXEL Click here to read to company history  AX-20  	    This french mono-bloc system had no great success. It was however a nice designed system with its 8 function keys mounted directly onto the monitor (like with some Hewlett-Packard systems). The idea was interesting, because the function of each key was dynamicaly displayed right above it, but it becomes tiring to have to lift an arm to reach these keys...    The AXEL-20 can display 640 x 416 pixels with 8 different level of brightness.

AXEL Click here to read to company history AX-20 This french mono-bloc system had no great success. It was however a nice designed system with its 8 function keys mounted directly onto the monitor (like with some Hewlett-Packard systems). The idea was interesting, because the function of each key was dynamicaly displayed right above it, but it becomes tiring to have to lift an arm to reach these keys... The AXEL-20 can display 640 x 416 pixels with 8 different level of brightness.

WICAT  150  	    Wicat stands for World Institute for Computer Aided Training. The Wicat is one of the first (perhaps even the first) computer to use a Motorola MC68000 processor.    It is a card-based computer. The mainboard just houses the processor, the boot PROMs, a very fast cache memory and the glue electronics.    A lot of cards were developed for this computer. Each card has its own CPU: The I/O board called ICI board uses its own 68008 (68000 with 8 bit data bus)...

WICAT 150 Wicat stands for World Institute for Computer Aided Training. The Wicat is one of the first (perhaps even the first) computer to use a Motorola MC68000 processor. It is a card-based computer. The mainboard just houses the processor, the boot PROMs, a very fast cache memory and the glue electronics. A lot of cards were developed for this computer. Each card has its own CPU: The I/O board called ICI board uses its own 68008 (68000 with 8 bit data bus)...

Xerox  820  	    The Model 820 is an attempt from Rank Xerox to enter the professional micro-computer market. But the 820 is a bit weak with its Z80 at only 2,5 Mhz and its 96kb 5''1/4 disk-drives (83k formated). Fortunately higher capacity 8'' disk-drives were also available (300 kb each). Apparently a 10Mb hard-disk was also proposed.    The communication was focused on the fact that the Xerox 820 could suit to a lot of professions, and indeed...

I have seen a lot of technology changes in my lifetime, and so many of those changes have happened very quickly.

Alpha Micro  1000 Series  	    The Alpha Micro 1000 was a line of systems based on the 68000 microprocessor. According to customer requests, each system could be configured from a single user microcomputer with 128 KB of RAM, up to a 60-users system with 3 MB of RAM and 2.4 GB of disk storage.    The operating system of the 1000 series was AMOS, a multi-user, multi-tasking and timesharing system allowing the user to easily add terminals and printers to the current configuration.

Alpha Micro 1000 Series The Alpha Micro 1000 was a line of systems based on the 68000 microprocessor. According to customer requests, each system could be configured from a single user microcomputer with 128 KB of RAM, up to a 60-users system with 3 MB of RAM and 2.4 GB of disk storage. The operating system of the 1000 series was AMOS, a multi-user, multi-tasking and timesharing system allowing the user to easily add terminals and printers to the current configuration.

Texas Instruments  TI-55-II  	    The TI-55 was one of the first programmable calculator which keeps programs and data in memory, even when it was turned off.    112 pre-programmed functions, including statisticals.

Texas Instruments was one of the first programmable calculators which keeps programs and data in memory, even when it was turned off.

Atari  600 / 800 XL  	    The Atari 800XL, together with the 600XL, were successors of the Atari 400/800 series and the unsuccessful Atari 1200 XL in a more compact case. They could use almost the same software, just so long as the program was written correctly, because of some slight differences between OS versions.    The 800XL had 64 KB of RAM, two joystick ports and kept all the custom chips (Pokey, GTIA, Antic) of the previous models.

I also used one of these at a school I think Grade 9 & 10 this is an Atari 800 XL

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