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The EIA-343-A Multi-Channel Video Board is a PCI 32-Bit 5V standard card designed to output three channels of 6-bit differential digital data as well as pixel clock, sync, blanking and restart differential digital information and one channel analog video via the Adapter.

Key Features:

• 32-bit Slave read/write PCI (Rev. 2.1) EIA-343-A Multi-Channel Video Board
• Output pixel clock rate of 40nSec generated on board
• Generates EIA-343-A, 875 Line, 2:1 interlaced, 60Hz, 808x808 active pixels and lines for the three digital channels and one analog channel
• Blanking and Sync pulses are generated automatically
• Restart bit is sent at the end of the scan
• Each Channel has 1Mbyte of fast static memory
• Control Register is memory mapped, and may be written to or read from, to enable memory reads, memory writes, scan reads or blanking of any of the three channels
• Status Register is memory mapped and may be read to determine which memory channel is being used during scan operations for verification
• Simultaneous scans and writes may occur to update memory when needed
• Conforms to EIA Standard EIA-343-A dated September 1969
• Test reads of all three channels of memory allowed
• The Adapter interfaces to the EIA-343-A Multi-Channel Video Board and is responsible for outputting the analog composite video and external sync; a connector is provided for IN-System Programming of the EIA-343-A Multi-Channel Video Board; three green LED's on the Adapter indicate the read status of the three channels of video data; the Adapter takes one vacant slot
• This Product was designed, built and used for driving differential digital data displays and an analog RGB type monitor, both conforming to EIA-343-A specification

Functional Description:

The EIA-343-A Multi-Channel Video Board is a memory-mapped multi-layer slave board communicating to the host processor using the PCI Bus. The board has a host-BIOS defined base address that is set during initialization and must be used for the software to address all functions.

A reset sent to the board initializes all functions, and a write to the control register will occur to zero out any or all of the three channels of video data. The control register bit(s) will automatically be reset after the video data has been set to zero. The host may read the control register to verify that the operation has been completed. At this time, the host writes to the control register to define which memory channel shall be written. Any or all of the channels may be written to, using 32-bit accesses. However, only one byte is written at the specified address per channel at one time. The data written to the channel or channels includes the sync, blanking and video data. Next, the host writes to the control register to indicate which channels are to be outputted digitally (any or all channels may be sent) and which channel is to be used and sent to a maintenance monitor (analog output). The host writes to the control register to start the scan operation and data is sent out of the board every 40nSec. To update memory while still in scan, the host writes to the control register to indicate which channel(s) are to be written and the host then begins to write to memory.

The EIA-343-A Multi-Channel Video Board will continue to scan until the host tells it otherwise by writing to the control register, or until a software or bus reset occurs. The EIA-343-A Multi-Channel Video Board is also capable of doing test reads of the memory. The host writes to the control register indicating which channel (one channel allowed) is to be read. Next, the host reads the channel memory at the specified address and the board sends 32-bits (4 bytes at a time) back to the host for verification.


Physical Description:

The EIA-343-A Multi-Channel Video Board is implemented on a PCI 32-Bit standard 5V long board. The board interfaces with the host PCI bus back plane. On the top edge of the board, one 10-pin right angle M-type connector is used in system programming, one 10-pin right angle M-type connector is used for driving three external LED's and two right angle SSMB type connectors are used for the composite analog signal and external sync. These four connectors will connect to the Adapter (Drawing No. 7124) in the host, providing the LED's and connectors for communication to the analog display and In-System Programming capability. A 50-pin right angle M-type connector is used at the front of the VOB board for all the differential digital signals.


Specifications: