Oric 1

Oric 1The Oric-1 was the first computer that Oric & Tangerine software released. The machine was not successful as expected, but in France it sold very well. The main problem was that when the machine was released competition was already high, bad design and a buggy ROM. Disk Drives were released in 3 inch format which helped to kill the machine even more. A Printer and a modem were released from Oric. Primary the machine was released with the idea to connect with Prestel, but the modem was very expensive. Currently a group of people formed a group and they are releasing software to revive the Oric-1.

Oric 1
16 KB £129 and 48 KB £169
Boxed: 127914
6502A 8bit 2Mhz CPU, running at a frequency of 1Mhz. The CPU was slowed to 1Mhz for proper video timing, which gives a ratio of 1:6. The CPU has the bus for half the time, and the other half for the 12 Mhz video chip.
16Kb ROM with Tangerine BASIC version 1.0. This version had numerous of bugs, which were fixed later with the Atmos version. Also later software did not work properly. There were rumors that the ROM software was not public because it was copied from Microsoft. 16Kb or 64Kb of RAM. 48Kb Ram is available for user since the top 16Kb of Ram overlaid by Rom. A simple memory mapping was used to address both Ram and Rom.
Small plastic case with calculator style buttons with a tilted shape for better acces to the keyboard. Both Case and buttons in white. Under the buttom case there is a speaker, the reset button and calibration screw for picture quality. The Keyboard is a standard ASCII QWERTY keyboard, with arrow keys and escape button.
Universal Logic Array also called ULA with two modes of operation and also responsible for DRAM refresh and arbitrating I/O. Text Mode 40×28, 8 colours, ASCII 128 character set and Teletex compliant. Characters are set on a Matrix of 6 by 8, and all characters can be changed from software. The top screen row is reserved by the rom as a status line when in Basic. Graphic Mode 240×200, 8 Colours with 6 pixels per byte. Serial attributes are used, and the two remaining bits for each frame buffer byte are used to mark the byte as a serial attribute. The last three lines, at the bottom of the screen are used for text, which could be increased by means of serial attribute magic.
An AY-3-8912 chip is used with 3 channels of sound, 1 channel for white noise, 7 octaves and 16 levels of volume. Oric mixed all channels to the internal speaker. The sound chip is also capable of producing 4096 different pitches and is completely independent from the CPU time.
1 x Parallel port, 1 x TV Output, 1 x RGB connector, 1 x Expansion, 1 x tape recorder with a baud rate of 300 bps and 2,400 bps. The tape connector is also used to amplify sound generated by computer.
External standard Power supply, with a voltage of 9V DC, 5.4VA.
Dimensions 280mm x 175mm x 17mm (W x L x H) Weight Approx 850g
120,000 units Worldwide.

The club currently owns one boxed Oric-1 with manuals, software, power supply, and cables in very good working condition. The computer was donated by a French school.


Cassette – Sound

Din 7 Pin 360

Pin Name Dir Desc
1 OUT OUT Tape Out
2 GND N/A Ground
3 IN IN Tape In
4 SOUND 8912 OUT Computer Sound Out Mono
5 SOUND 8912 OUT Computer Sound Out Mono
6 REM IN Tape Controller Positive
7 REM OUT Tape Controller Negative


Expansion Bus

34 way male connector
at the computer

Pin Name Dir Desc
1 MAP IN Memory Map
2 ROMDIS IN Rom Disable
3 CLOCK2 OUT Clock 2
4 RESET IN Reset
6 I/O CNT IN I/O Control
7 R/W IN Read/Write Enable
8 IRQ IN/ OUT Interrupt Request
9 D2 IN/ OUT Data Bit 2
10 D0 IN/ OUT Data Bit 0
11 A3 OUT Address 3
12 D1 IN/ OUT Data Bit 1
13 A0 OUT Address 0
14 D6 IN/ OUT Data Bit 6
15 A1 OUT Address 1
16 D3 IN/ OUT Data Bit 3
17 A2 OUT Address 2
18 D4 IN/ OUT Data Bit 4
19 D5 IN/ OUT Data Bit 5
20 A4 OUT Address 4
21 A5 OUT Address 5
22 D7 IN/ OUT Data Bit 7
23 A6 OUT Address 6
24 A15 OUT Address 15
25 A7 OUT Address 7
26 A14 OUT Address 14
27 A8 OUT Address 8
28 A13 OUT Address 13
29 A9 OUT Address 9
30 A12 OUT Address 12
31 A10 OUT Address 10
32 A11 OUT Address 11
33 VCC OUT +5V Max 500mA
34 GND N/A Ground


Printer Port

34 way male connector
at the computer

Pin Name Dir Desc
1 STB IN/ OUT Strobe
2 GND N/A Ground
3 D0 IN/ OUT Data Bit 0
4 GND N/A Ground
5 D1 IN/ OUT Data Bit 1
6 GND N/A Ground
7 D2 IN/ OUT Data Bit 2
8 GND N/A Ground
9 D3 IN/ OUT Data Bit 3
10 GND N/A Ground
11 D4 IN/ OUT Data Bit 4
12 GND N/A Ground
13 D5 IN/ OUT Data Bit 5
14 GND N/A Ground
15 D6 IN/ OUT Data Bit 6
16 GND N/A Ground
17 D7 IN/ OUT Data Bit 7
18 GND N/A Ground
19 ACK IN Acknowledge
20 GND N/A Ground


RGB Monitor

5 Pin Din 180

Pin Name Dir Desc
1 RED OUT Red Channel
2 GRN OUT Green Channel
3 BLU OUT Blue Channel
4 SYNC OUT Comp Sync
5 GND N/A Ground