Amiga Storage Peripherals

Indivision AGA 1200 / Indivision AGA 4000

> Company: Individual Computers, Germany
> Date: 2008/2009
> Amiga: A1200, A4000, CD32
> Interface: ISA
> Autoconfig ID: ID2193 / 1,2

With A Maximum Input Pixel Clock Of 28 MHz, All Amiga Video Modes Up To Super Hires Are Supported And Flicker-Fixed (With The Exception Of The A2024 Mode)
Picture Refresh Rate Of At Least 60 Hz For All Screen Modes, Resulting In A Maximum Output Pixel Clock Of 71 MHz
24 Bit Color Support (16.7 Million Colors)
Supports Interlaced And Progressive Scan Input Modes
Output Modes Are Always Progressive Scan
Two Output Modes Can Be Chosen:
Async Mode: Output Pixel Clock Of Amiga Modes Are Multiplied 2.5 Times
Vertical Sync Mode: Exact Double Of Amiga Mode Pixel Clock (Eliminates Tearing Effects)
Clips Only Onto The Lisa Chip On Motherboard, No Soldering Required
Gets Power And All Signals From This Chip
Sync Signals Are Derived From The Inter-Chip Communication Of The AGA Chipset
HD15 VGA Connector
Supports Border Blanking
16 Megabyte SDRAM
SDRAM Is Single-Ported, Thus Reading And Writing Is Decoupled By Two FIFO Buffers And A Dual-Port SDRAM Controller Running At 111 MHz
Only 12 MB Are Used, 4 MB Stay Free
Memory Layout Of 2048×2048 Pixels (= Maximum Resolution)
Compatible To Genlocks
No Passthrough Mode (All Resolutions Are Flicker-Fixed)
FPGA Based Design With FlashROM
Emergency Mode (Emergency Disk Needed) In Case A FlashROM Update Went Wrong
Low Heat Dissipation Due To 2.5V/3.3V Design (Only The Voltage Regulator Is 5V)
Boot Screen, Shown For A Pre-Defined Time – In Case Important Information Is Displayed (E.G. Guru / Error Screen, Early Startup Menu), This Time Is Reduced
Cutouts In The Board Allow Installation Of Other Internal A1200 Components Like IDE-Fix Express And The Lyra 1200 Keyboard Adaptor – Tight Design, So Boards May Touch On Certain A1200 Board Revisions
First Revision Boards Were Prone To Snapping From The Lisa Socket, So Later Revisions Had The Socket On The Indivision Board Machine Finished
This Is A Follow-Up Design To The Indivision AGA 1200, Offering The Same Features While Having A Different Board Layout To Fit In A4000D And CD32
10nF Capacitors Have Been Added To The PLLs
Two (Instead Of One) TTL Drivers For The VGA Sync Wires
Prototype Board Is White, The Final Version Has A Blue PCB


Amiga Indivision AGA 1200 / Indivision AGA 4000

Front: Indivision AGA 1200 / Indivision AGA 4000 front view

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