Muxiya Computer Products

The Muxiya Corporation was a business that produced computers, peripherals, and software of their own design beginning early in the history of computing on Udyana, shortly following the invention of the silicon semiconductor integrated circuit, where they produced large mainframe computing machines for businesses. As technology progressed, the computers became appliance-sized minicomputers, and eventually microcomputers suited for a presence on or near a desk. With the decreases in size came decreases in manufacturing costs, and with decreasing manufacturing costs came lower costs for end users, allowing individuals to begin purchasing their own computers.

Muxiya's product naming scheme includes a three or four digit number. For example, the Abiya 334 was a product in the Abiya 300 family, the "third generation" of the Abiya product line, which was intended for offices and schools. The third generation computer products used a processor called the NiveDa Paveka 2-2714. Translated with some liberties to English, this means InfoCom (a truncated form of the words Nivedana and Dazhavara, information company) Speed 2, 27 megacycles, 14-bit. These numbers in base 10 are roughly 6 megahertz, with a 12 bit bus.

Being a 33X device means it was meant to be paired with the Abiya 330, and the 4 at the end means it is the fourth device in that family, after the computer itself, the two variants of the keyboard, and the double disk drive.

# Abiya 300 Family

The Abiya 300 device family is made up of the devices that used a common processor family, the Paveka 2-XX14 processors.

## 310 Devices

A310 devices were the first series of computers built by Muxiya to use the Paveka 2 series of NiveDa processors. They are recognizable especially for their slate gray "business" color scheme as opposed to the black and purple "personal" color scheme.

### Abiya 310 Rackmount Computer

The Abiya 310 was a version of the Abiya 300 series with a case that was meant to be loaded into a rack, a cabinet of computers and peripherals in the basement or a ventilated server closet to be accessed by a terminal from the desk of the employee or student. It featured the same base configuration as the 320 and 330 computers, with 192 dehshavash, or roughly 144 kibibytes of memory that was expandable up to 768 dehshavash, the six megahertz Paveka 2-2714 CPU, and eight additional 12-lane peripheral expansion card slots.

The terminal, which Muxiya would have intended to be an a311 terminal, interfaces with the system over a serial connection that sends out inputs and commands, and receives text to display on screen.

### Abiya 311 Hard Disk Drive

Abiya 311 are large rack mounted hard disks intended to be used as storage devices for the a310. It could store five megabytes of data, or

### Abiya 312 Terminal Interface Device

The a312 was a small, flat box with a simple computer housed inside. This computer was responsible for controlling the display and interpreting the inputs from the keyboard. It featured a small amount of screen memory, four dehshavash, which was capable of storing slightly more than two full screens of character information for the purposes of scrolling. Fundamentally, it was a hub for the display output and keyboard input. It had very little processing power on its own, roughly equivalent to a computer from a decade earlier.

Internally the machine is composed of three main parts. The motherboard on the right, which has a pink color and has most of the integrated circuits on it. It actually shares much of its layout with the motherboard from the a310 and a320 machines, but a majority of the sockets and places for chips and cards to be inserted are not populated. It instead features a simple processor comparable to the Intel 8008 used on Earth in the 1970s, with a clock speed of roughly 650 kilohertz, an address bus of 12 bits, and a data bus of only 6 bits. 3 kibibytes of memory, a keyboard controller, a serial controller, a display controller, rom code, and numerous other logic chips were also featured on the machine. The PCS-12 slots and controller, Paveka 2-2715 coprocessor, and the logic to communicate PCS-12 information to the CPU were omitted.

The brown slot at the front of the motherboard is intended for use with a matching a313 monitor resting atop the terminal's body, and provides power and video to the display. The rear of the machine featured a keyboard connector, which is made from the male end of an IDP11 port with a proprietary pinout, a female IDP11 port used as a terminal connector to allow the terminal to communicate with the host machine elsewhere in the building, an optional 3-pin monitor port, a power passthrough, and a power input.

The power supply board in the top left of the machine is yellow in color and produces the voltage rails for the usage of the system, as well as a number of thermistors connected to a small controller chip. These inform the chip of the temperature of the air near the power supply's main capacitors and transformers, and in turn will increase the fan speed with temperature. This power supply board is the same as the one used in most of Muxiya's machines of this era, and can supply up to 85 watts of continuous power with brief bursts up to 125 watts. As with the motherboard, auxiliary power connectors for things like hard disks and internal disk drives are simply missing to save on production costs when compared to producing a bespoke power supply unit for the a312.

The blower fan, the third large component, attempts to keep the power supply under a target temperature of roughly 70° Celsius. As a blower fan, it draws air from the bottom of the case, beneath the motherboard tray and through a vent on its underside, and forces it sideways out of a duct that points towards the power supply. The fan receives power from the teal wire, is grounded on the middle brown wire, and has its speed controlled over the white wire.

### Abiya 313 Monochrome Monitor

The a313 was a 14-inch monochrome yellow phosphor monitor. Its aspect ratio was slightly proprietary, with a size somewhere between 4:3 and 2:3, roughly 4.3:3, or more accurately 430:299. This allowed a wider resolution of 70 characters.

Its primary video interface was located in the base, as it slotted into the square indentation in the top of the a312 terminal unit. If the monitor was used with another computer, it also featured a digital monochrome 3-pin monitor interface that sent digital monochrome video with a 2-bit brightness depth. This allows for empty screen area, "dim" text, standard text, and "bright" text. Combined with box drawing characters and inverted characters with black characters and colored backgrounds, these brightness levels allow for simple graphical user interfaces.

### Abiya 314 Extended Function Keyboard

The a314 was a keyboard made for use with the a310. It has a detachable cable that plugs in to the right side of the housing and features a layout known as the Muxiya Extended Layout, which includes a number of keys dedicated to specific functions like cutting, copying, and pasting, write over and delete forwards, stop and pause keys to control the drawing of text, clearing the screen to just a prompt, a program swap key, an indent key, and a power key to turn the terminal on and off. This is different from the computer itself, which is housed somewhere else.

Otherwise, it mostly matches the layout of the full-size keyboard, with five function keys, an eight key navigation cluster, an 19 key integrated calculator, but the indent key and option 2 and 3 keys have been removed. Its integrated calculator was seen as one of its most important features as it included a send key.

## 320 Devices

### Abiya 320 Desktop Computer

The a320 was nearly identical in capability to the a310, but was housed in a case meant to rest beneath the monitor and on the desk of the user. It featured the same CPU and base memory configuration as well as its expansion limit, but only featured four expansion slots. This is thought to be due to the built in disk drive controller and monochrome video adapter taking up their space on the motherboard.

## 330 Devices

### Abiya 330 All-in-One Computer

The a330 series was designed to be sold at a low cost to offices and schools, as it had a space-saving design with the motherboard of the computer inside the base of the monitor, but it sacrificed the expandability of the 320, a desktop and tower design that required an external monitor.

The standard specifications included a ten-inch P11 phosphor blue monochrome CRT, a six megahertz Paveka 2-2714 CPU and 184 dehshavash of memory. This was the same as the Abiya 310 and 320, but it had no expansion options beyond parallel peripherals. What It didn't include was any built-in storage at all, as hard drives or floppy drives weren't feasible to include within in the housing. It instead simply boots from a ROM chip inside that contains Muxiya's MaUVaKeh operating system. Up to two optional ROMs would be added at the request of the client that contained various pieces of productivity software, such as a word processor, spreadsheet editor, database manager, graphing programs, limited art programs, and more. As its intended market was schools and businesses, data produced by the computer was intended to be saved to storage servers or shared disk drives over the local parallel stack.

It connected to most of its peripheral devices through one of two 22-pin parallel interfaces, though a 6-pin dual mode cassette port for a tape drive, an 11-pin IDP port, and an infrared interface were also available. This port was intended for use with a keyboard as it was given a very high priority within the system, sending interrupts to the CPU whenever data was sent to or from it, which occurred whenever keys were pressed or released. This rendered it essentially incompatible with normal IDP devices. The infrared receiver was also intended for use with wireless keyboards.

#### Abiya 331 and Abiya 332 Keyboards

The a331 and a332 are options for keyboards included with the a330. They used Muxiya Foam and Foil keyswitches and a standard Muxiya compact layout with 66 keys. This is in contrast to the a321 keyboard, which had more keys.

The only difference between the a331 and a332 was that the former used an IDP11 connector with a proprietary pinout, and the latter used an infrared communication protocol and ran on battery power. If the layout didn't appeal to the user, the previous a321 shared the connector and could be used instead, but there was no wireless variant available.

#### Abiya 333 and Abiya 334 7.4azh Diskette Drives

The a333 and a334 are 268 kilobyte, 7.4azh floppy disk drives that communicate across the peripheral stack with 22-pin parallel interfaces. The differences between them are obvious in that the a333 had two individual drives, while the a334 had only one.

The drives were considered "smart" drives due to the fact that they contained their own 1.25 megahertz processor and 24 kilobytes of memory. 16 kilobytes of this memory was a program buffer that stored the commands the drive had been sent, and the remaining 8 kilobytes were used as a data buffer to allow smooth and coordinated data transmission both from its inserted disks and from devices across the parallel interface.

#### Abiya 335 4-Track Cassette Deck

4-Track cassette tapes were popular data storage devices at the time of the a330's release, and the a335 was the tape deck that was marketed alongside the a330. It was a high quality computer tape deck for its day, as it was able to store just over 1.5 megabytes on a standard 140 minute tape thanks to its digital interface. The product was short lived, however, as the speed of disks increased and their prices decreased, they were relegated more and more to being used solely for backup and mass storage purposes. As it used a purely digital interface, there was no purpose for it other than as a data drive, as it couldn't read standard audio cassettes.

#### Abiya 336 Hard Disk Drive

Using a nearly identical housing to the a334 diskette drive, aside from the solid front plate, the a336 was a twelve megabyte hard disk drive that used a 22-pin parallel interface. It shared the same hardware control computer that the a333 and a334 used, but a different ROM code for controlling the hard disk's platters and heads.

#### Abiya 3310 Portable Computer and Abiya 3311 Integrated Latching Keyboard

The a3310 portable computer was an expensive custom integrated unit that included the equivalent of an a333 diskette drive, an a330 all-in-one computer, and a 6-inch monochrome CRT in a single case. Its total cost was slightly higher than the stationary models bought together when new, but the portability was seen as an acceptable tradeoff for those who actually needed to bring their computer with them.

Its keyboard, model number a3311, clipped over the front of the unit to both protect its keys and the front of the machine from damage while the machine is being transported. It had a small, unique 5-pin connector on a short cable, a slimmer case, and a different color scheme for the keycaps, and the same foam and foil switches used in the a331 and a332.