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Oric Microdisc
Microdisc schematics
Short range chart

What's what

When trying to achieve something complex, potentially involving numerous persons, it's important that everybody knows what the terms used by other people actuall means. This is why this glossary is here.

6502
8 bit processor created by the Western Digital Center. It can be found into the Oric computers, but was also present in various versions in the Acord BBC, Commodore VIC 20 and C64, Atari 8 bits, Apple 2 computers, and Nec PC Engine. A 16bit version, called 65816 was also created, and is present in the Super Nintendo (used as a base for the Super Oric).

6522
See "Versatile Interface Adapter"

BD-DOS
The operating system used on the BD-500 disc drives.

Jasmin
Floppy disk drive unit designed by TRAN to work on the Oric computers as a cheaper alternative to the Microdisk. Accepts 3.5" and 5.25" floppy disks, but uses its own operating system (FTDOS) not compatible with the original Microdisk operating system. with the

FDC 1773
The Western Digital 1773 Floppy Disk Controller is used on the Jasmin boards to access the floppy disk drives.

FDC 1793
The Western Digital 1793 Floppy Disk Controller is used on the Microdisc boards to access the floppy disk drives.

Field-programmable gate array
A field-programmable gate array (FPGA) is an integrated circuit designed to be configured by the customer or designer after manufacturing—hence "field-programmable". The FPGA configuration is generally specified using a hardware description language (HDL), similar to that used for an application-specific integrated circuit (ASIC) (circuit diagrams were previously used to specify the configuration, as they were for ASICs, but this is increasingly rare). FPGAs can be used to implement any logical function that an ASIC could perform. The ability to update the functionality after shipping, partial re-configuration of the portion of the design and the low non-recurring engineering costs relative to an ASIC design (not withstanding the generally higher unit cost), offer advantages for many applications.
- See Wikipedia entry

FPGA
See "Field-programmable gate array"

MCU
See "Microcontroller"

Microcontroller
A microcontroller (sometimes abbreviated µC, uC or MCU) is a small computer on a single integrated circuit containing a processor core, memory, and programmable input/output peripherals. Program memory in the form of NOR flash or OTP ROM is also often included on chip, as well as a typically small amount of RAM. Microcontrollers are designed for embedded applications, in contrast to the microprocessors used in personal computers or other general purpose applications.
- See Wikipedia entry

Microdisc
Floppy disk drive unit designed to work on the Oric computers. Accepts 3" floppy disks, exists as Master and Slave models. The Master model contains a controller board, and accepts up to three slave units. The Telestrat computer has a built in microdisk controller and should only be connected to slave models.

ORIC-DOS
The original operating system for the Microdisc.

PIC
See "Programmable Interface Controller"

PLD
See "Programmable logic device"

Programmable Interface Controller
PIC is a family of Harvard architecture microcontrollers made by Microchip Technology, derived from the PIC1640 originally developed by General Instrument's Microelectronics Division.
PICs are popular with both industrial developers and hobbyists alike due to their low cost, wide availability, large user base, extensive collection of application notes, availability of low cost or free development tools, and serial programming (and re-programming with flash memory) capability.
- See Wikipedia entry

Programmable logic device
A programmable logic device or PLD is an electronic component used to build reconfigurable digital circuits. Unlike a logic gate, which has a fixed function, a PLD has an undefined function at the time of manufacture. Before the PLD can be used in a circuit it must be programmed, that is, reconfigured.
- See Wikipedia entry

RANDOS
An operating system for the Microdisc (that uses 512 bytes per sector and a pseudo DOS compatible FAT).

SEDORIC
The operating system most commonly used on the Microdisk and Cumana drives.

FTDOS
Operating system designed by TRAN to work on the Jasmin disk drive familly. Not compatible with any other Oric operating system.

Versatile Interface Adapter
A dedicated chip designed to complete 6502 based system, that provided advanted input and output capabilities, timers, and interrupt driving. On the Oric, it is responsible for handling the sound processor and printer port.

VIA
See "Versatile Interface Adapter"

Western Digital Center
WDC is the company that designed the 6502 processor.


Jasmin disc unit
Microdisc schematics
Microdisc unit - front