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.

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.

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...

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...

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.

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...

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...

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.

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.

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.

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.

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