Tandy Radio Shack  TRS 80 MODEL II  	    The TRS-80 model II, is the obscure brother of the TRS-80 family. Many internet pages deal with the models 1,3 and 4 but omit the model 2... This is maybe because the TRS-80 Model 2 was intended to be a business computer for use in offices and labs. Thus it is equiped with a full height Shugart 8'' drive with a capacity of 500k which is a lot compared to the 87k offered by the TRS-80 Model 1 system disk.

Tandy Radio Shack TRS 80 MODEL II The TRS-80 model II, is the obscure brother of the TRS-80 family. Many internet pages deal with the models 1,3 and 4 but omit the model 2... This is maybe because the TRS-80 Model 2 was intended to be a business computer for use in offices and labs. Thus it is equiped with a full height Shugart 8'' drive with a capacity of 500k which is a lot compared to the 87k offered by the TRS-80 Model 1 system disk.

Sharp  MZ 80K  	    The MZ-80K was, alongside the Apple II, the Commodore PET and the Tandy TRS 80痴 one of the best known computer in the early 80's. Its name stands for "M" from MICRO and Z-80 from the computer it uses.    It has no language in ROM, and BASIC has to be loaded from tape. Sharp called this "clean design", as you could choose what you wanted to put in your computer, the MZ-80K being delivered clean...

Sharp MZ 80K The MZ-80K was, alongside the Apple II, the Commodore PET and the Tandy TRS 80痴 one of the best known computer in the early 80's. Its name stands for "M" from MICRO and Z-80 from the computer it uses. It has no language in ROM, and BASIC has to be loaded from tape. Sharp called this "clean design", as you could choose what you wanted to put in your computer, the MZ-80K being delivered clean...

Sord  M223 series  	    These computers were generally sold for specific professionnal use along with the appropriate software.    Two models were launched: the Sord MK II 203 and Sord MK II 223. The difference is that the 223 has 3 x S100 slots for easy expansion. Both have a special DMA channel for the disks (floppy and hard disk).    Some software was sold with them, which included the MFDOS, several Sord BASIC's, a compiled Basic (C-Basic) and many tools.

Sord M223 series These computers were generally sold for specific professionnal use along with the appropriate software. Two models were launched: the Sord MK II 203 and Sord MK II 223. The difference is that the 223 has 3 x S100 slots for easy expansion. Both have a special DMA channel for the disks (floppy and hard disk). Some software was sold with them, which included the MFDOS, several Sord BASIC's, a compiled Basic (C-Basic) and many tools.

Sharp  MZ 80C  	    The MZ-80c is based on the MZ-80K, but offers some enhancements to match the professional market of that time. The price was improved too ;-) It was the first MZ-80 computer to be delivered assembled as opposed to first MZ-80k which were sold as kits.    The RAM size is now of 48 KB. The keyboard which was so strange on the MZ-80K because of its matrix organisation, has now a more common layout with a large spacebar key. The numeric keypad is separated.

Sharp MZ 80C The MZ-80c is based on the MZ-80K, but offers some enhancements to match the professional market of that time. The price was improved too ;-) It was the first MZ-80 computer to be delivered assembled as opposed to first MZ-80k which were sold as kits. The RAM size is now of 48 KB. The keyboard which was so strange on the MZ-80K because of its matrix organisation, has now a more common layout with a large spacebar key. The numeric keypad is separated.

OPEN UNIVERSITY, UK  PT501  	    Virtually no information about this training board that was provided, prior to the Hektor PT602 with a Open University course called 'Microprocessors and Product Development - a course for managers'.    The choice of the microprocessor is a bit surprising as the 8049 was more a microcontroller than a true microprocessor. Later, the 8049 will be commonly found inside dot-matrix and PC keyboards.

OPEN UNIVERSITY, UK PT501 Virtually no information about this training board that was provided, prior to the Hektor PT602 with a Open University course called 'Microprocessors and Product Development - a course for managers'. The choice of the microprocessor is a bit surprising as the 8049 was more a microcontroller than a true microprocessor. Later, the 8049 will be commonly found inside dot-matrix and PC keyboards.

Sanyo  PHC 3000  	    Nothing is known about the history of this computer which was probably sold only in Japan.    It was one of the rare professional computer to use the 16-bit Texas Instruments TMS-9900 microprocessor, also used in the TI-99/4 home computer.    A Basic interpreter and Assembler were available on diskette.

Sanyo PHC 3000 Nothing is known about the history of this computer which was probably sold only in Japan. It was one of the rare professional computer to use the 16-bit Texas Instruments TMS-9900 microprocessor, also used in the TI-99/4 home computer. A Basic interpreter and Assembler were available on diskette.

RAIR microcomputer  Black Box  	    RAIR was a very early UK manufacturer of 8085-based systems and eventually licensed its designs to ICL.    This obscure system was sold with a hard-disk and a 5"1/4 disk-drive built-in. It was conceived to be used as a multi-user system.    The following languages were available : Basic, Cobol, Fortran, Pascal, PL/1.

RAIR microcomputer Black Box RAIR was a very early UK manufacturer of 8085-based systems and eventually licensed its designs to ICL. This obscure system was sold with a hard-disk and a 5"1/4 disk-drive built-in. It was conceived to be used as a multi-user system. The following languages were available : Basic, Cobol, Fortran, Pascal, PL/1.

Vector Graphics  MZ  	    The Vector Graphic MZ featured the same hardware basis as the VIP model: S-100 based system with a Z80A processor running CP/M operating system.  However, its separate main unit had an 18 slot motherboard and integral dual floppy disc drives (2 x 315 KB).    The system came with 48 KB of RAM, 4 KB monitor ROM, and used the Vector 3 "Mindless Terminal". Although it may look like a terminal, the Mindless Terminal only had a parallel keyboard, and a B/W monitor.

Vector Graphics MZ The Vector Graphic MZ featured the same hardware basis as the VIP model: S-100 based system with a Z80A processor running CP/M operating system. However, its separate main unit had an 18 slot motherboard and integral dual floppy disc drives (2 x 315 KB). The system came with 48 KB of RAM, 4 KB monitor ROM, and used the Vector 3 "Mindless Terminal". Although it may look like a terminal, the Mindless Terminal only had a parallel keyboard, and a B/W monitor.

NEC  PC 8001  	    In 1979, the NEC PC-8001 was an excellent machine, offering 8 colors when most of its competitors were still monochrome. There is even a (low) graphic resolution of 160 x 100 dots. It could display capital and small letters.    The PC-8001 had great success with Japanese businesses, where it was widely used. At the time, NEC claimed that the PC-8001 represented at least 45% of their home japanese market.

NEC PC 8001 In 1979, the NEC PC-8001 was an excellent machine, offering 8 colors when most of its competitors were still monochrome. There is even a (low) graphic resolution of 160 x 100 dots. It could display capital and small letters. The PC-8001 had great success with Japanese businesses, where it was widely used. At the time, NEC claimed that the PC-8001 represented at least 45% of their home japanese market.

OHIO Scientific  Challenger 1P  	    Ohio Scientific, based in Ohio, USA, were the makers of the Superboard II. The Challenger 1P and Challenger IIP-MF were essentially cased versions of this single board system with integrated keyboard, a single 5Volt power supply and the first 6502 version of Microsoft BASIC interpreter.    An optional floppy disk controller and a extra 24K of ram for this unit was available using a 610 expansion board.

OHIO Scientific Challenger 1P Ohio Scientific, based in Ohio, USA, were the makers of the Superboard II. The Challenger 1P and Challenger IIP-MF were essentially cased versions of this single board system with integrated keyboard, a single 5Volt power supply and the first 6502 version of Microsoft BASIC interpreter. An optional floppy disk controller and a extra 24K of ram for this unit was available using a 610 expansion board.

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