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: 50 MHz or 35 MHz
FCC ID: unknown
VESA Standard:
BIOS Dates: 01/08/90
Known BIOS Versions: ECv2.13-35
Price: ?

The OTI037C (or OTI-037C) is a Super VGA chipset from 1988. Whilst it's used on 16-bit ISA video cards, this chipset only runs at 16 bits wide to access the VGA BIOS extensions - access to video memory and the video controller itself runs at 8-bit. The data bus that receives video data is also 8-bit.

Due to the 16-bit VGA BIOS access, cards based on the OTI-037C typically have two video ROM chips - one for 'odd' and a second for 'even'.

Datasheet

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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Mozart (OTI601)             

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 co-developed 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.

The OTI601 can be found on the following cards:

• PAC Magic 93365-2
• Lxycon Sound Booster (FCC ID: IEW30601211)

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