Oak Technology

Oak was a graphics card and sound card manufacturer for the IBM PC and its compatibles. They also made a 286 and 386 motherboard chipset, which is covered on this page.

 

 

Motherboard and Graphics Cards

OakHorizon 286 and 386SX Chipset

Launched: 1989

Two versions of the chipset were released: the OTI-050LAP was designed for use in laptops, whilst the OTI-050DESK was for desktop PCs. Both are five-chip chipsets, incorporating the following:-

OTI-051 - System support logic
OTI-052 - I/O Control logic
OTI-053 - DMA and memory controller
OTI-054 - Address buffer, Real-time clock, CMOS RAM
OTI-055 - Data buffer and power manager (only needed in the laptop version)

 

OTI037C ("Suntra")

Launched: 1988
Bus: ISA 16-bit.
Memory: 256 KB DRAM
Ports: 15-pin DSUB (analogue video output), 9-pin DSUB (digital video output)
RAMDAC: unknown
RAMDAC Speed: unknown
FCC ID: unknown
VESA Standard:
BIOS Dates: 01/08/90
Known BIOS Versions: ECv2.13-35
Price: ?

Found on:

  • FCC ID: IDW37162002 (ACE VGA)
  • MIO-AT SUPER (see last 2 pics below - a combined floppy/hard disk controller, serial/parallel and VGA card)

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OTI067

Launched: 1990
Bus: ISA 16-bit.
Memory: 256 KB or 512 KB DRAM
Ports: 15-pin DSUB (analogue video output)
Price: ?
FCC ID: 4DW67082004
Known BIOS Versions: 1.03

Some OTI067-based cards are more complete Hercules, CGA, EGA, VGA and SVGA cards, like the VG-7000 pictured below (pics 2-4), which provides both a 9-pin TTL (digital) video output for Hercules, CGA and EGA, as well as a 15-pin analog video output for VGA monitors.

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OTI077 / OTIVGA

Launched: 1992
Bus: ISA 16-bit
Memory: 256 KB or 512 KB DRAM
Ports: 15-pin DSUB (analogue video output)
Price: ?
FCC ID: E5X5R5-1570
Known Board Revisions: C.1

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OTI087 / OTIVGA

Launched: 1995
Bus: ISA 16-bit
Memory: 512 KB or 1 MB DRAM
Ports: 15-pin DSUB (analogue video output)
Price: $114
FCC ID: IDW-87082035
Known Board Revisions: 1580 REV G

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Sound Cards

Diamond Multimedia OEM'd a few sound cards despite being largely remembered for their graphics cards. Oak technology were the development company behind these. Oak Technology exited the PC audio and 3D graphics markets in the quarter ended March 31st, 1998.

Mozart

FM synthesizer: Yamaha YMF262
Audio codec: Crystal CS4231-KL EP

A basic board offering only Ad Lib, SoundBlaster 1.x (mono output) compatibility. The OAK OTI-601 / OTI-605 "Mozart" chip itself was codeveloped by Oak and Media Chip who later got bought by OPTi, which is why it is related to OPTI's MAD16.
Panasonic, Mitsumi, Sony and IDE CD-ROM connectors - only one can be used at any one time.

More Images (PAC Magic 93365-2 with FCC ID: IPLMAGIC)

Mozart-16

Introduced in 1994.
FM synthesizer: Yamaha YMF262
Audio codec: Analog Devices AD1846.
Oak OTI601 chip.
FCC ID: IEW30601211
PnP.

If the long number at the bottom of the Oak chip is 9-digits long, the card has a 'B'-chipset and is not MPU-401 compatible. If it's 11 digits long and has either 'EE' or 'FF' in it, the card is an 'E' or 'F' chipset, and is MPU-401 compatible.
Panasonic, Mitsumi, Sony and IDE CD-ROM connectors - only one can be used at any one time.
The default IRQ for this board is 11.

Other variants of this card are called the Mozart LCS-9620.

Drivers: DOS & Windows 3.x (OPL4 support in Win3.x), NT / XP, Windows 9x

More Images:

Mozart Wave Table

Introduced in 1994.
FM synthesizer: Yamaha YMF278B (OPL4)
Audio codec: Analog Devices AD1846.
Oak OTI601 chip.
FCC ID: IEW30601213

The Yamaha YRW801-M is a 1MB ROM that stores all the wave samples of the GM Level 1.
Panasonic, Mitsumi, Sony and IDE CD-ROM connectors - only one can be used at any one time. OPL4 chip.

Windows 9x