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386sx motherboards using the OPTi 82C283 chipset - MAME machine

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op82c283
386sx motherboards using the OPTi 82C283 chipset
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GAME SYSTEM CHD BIOS DEVICE PARENT CLONE MECHANICAL SCREENLESS

Main data
Romset and name:
op82c283 386sx motherboards using the OPTi 82C283 chipset
Short name:
386sx motherboards using the OPTi 82C283 chipset
Manufacturer:
-
Year:
199?
Genre:
Computer
Category:
Computer / Business - Terminal
Serie:
-
Driver source:
pc/at.cpp
Language:
Similar games:
Input / Controls
Players:
Only one supported
Input:
Mouse, Keyboard
Buttons / keys:
108
Coins:
0
Cabinet:
-
Free-play:
Not supported

Rankings
Average user rating:
AntoPISA BestGame:
-
MASH All-Time:
-
Video
Display:
640x480@60.054866 Hz, CRT 31kHz
Orientation:
Horizontal
Scrolling:
Unknown
Colors:
-
CPU:
AM9517A, Intel 8042AH, Intel 8051, Intel I386SX
Audio
Sound:
4 audio channel
Audio chips:
Filtered DAC, Floppy sound, Speaker
Romset
First release:
Mame 0.215 released on oct-30 2019
Last release:
Mame 0.289 released on jul-31 2026
Clone of:
ibm5170 PC/AT 5170
Bios:
Not required
Use rom of:
-
Use sample of:
-
Previous romset:
None
New romset:
None
Files
Dump:
GOOD
Required files:
Romset:
Status
OVERALL:
PRELIMINARY
Emulation:
Preliminary
Graphic:
Imperfect
Color:
Good
Sound:
Good
Cocktail:
Good
Protection:
Good
Save state:
Not supported
Additional info
  • History
  • Info
  • Score
  • PCB
  • Commands
  • Init
  • Driver
  • XML
  • Motherboard:

    386sx motherboard using the OPTi 82C283 chipset © 199? Unknown

    The 82C283 was a "single-chip" integration effort by OPTi, meant to provide a complete 386SX/AT-compatible platform without the high component count of earlier designs. In many implementations, it was paired with the OPTi 82C206 (IPC) to handle the peripheral requirements (DMA, interrupts, timers), creating a minimalist, ultra-reliable motherboard architecture.

    TECHNICAL
    Core Role: Integrated System Controller, DRAM controller, and AT-Bus interface.

    Processor Support: Specifically optimized for Intel/AMD 386SX and Cyrix 486SLC microprocessors.

    Bus Architecture: Pure 16-bit ISA (AT Bus). It was a "no-frills" design, focusing on rock-solid compatibility with standard 16-bit expansion cards.

    Memory: Typically supported up to 16MB of DRAM (30-pin SIMMs) using page-mode access.

    Feature Integration: It included hardware-level support for Shadow RAM (BIOS shadowing) and "Hidden Refresh," which prevented the CPU from stalling during memory refresh cycles.

    TRIVIA
    Olivetti Deployment: This chipset was notably used by Olivetti in several of their business-class 386SX workstations (e.g., the M300-15). These systems are highly regarded by collectors for their excellent build quality and custom BIOS implementations that often pushed the 82C283 slightly beyond its "reference" performance.

    The "SxPI" Philosophy: OPTi marketed this as an "SxPI" solution. The "PI" stood for Peripheral Integrated. The goal was to eliminate the need for the dense "forest" of TTL logic chips that earlier 386 motherboards required to glue the CPU to the ISA bus.

    CONTRIBUTE
    Edit this entry: https://www.arcade-history.com/game/240478/?o=2
    Information provided by © Alexis Bousiges
    Information provided by Contribute to the translation
  • Information provided by
    Information provided by / © Copyright of Fujix
  • Information provided by
  • Information provided by
  • Information provided by Fabricio Coroquer, revisited from the work of
    NOTICE: The short version was discontinued in November 2019
  • Information provided by Contribute
  • Information provided by
  • Information provided by
Dip-switches:
Cheats:
Ports:
Devices refs:
Media options:
RAM options:
Software lists:
Link:




If you notice any inaccuracy or error, please report

Data updated on july 31 2026


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Romset:
op82c283
Title:
386sx motherboards using the OPTi 82C283 chipset
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