The OP1850 is a stand-alone PC card capable of Ultra, Narrow, Wide, Single-Ended, and Low Voltage Differential SCSI testing. 

Each card contains a RISC processor, cache memory, data-compare hardware and SCSI interface hardware, as well as on-board multitasking software which enables all devices to be operated simultaneously without additional programming. All SCSI testing requirements are user programmable.  The cards are capable of running tests and routines developed with both the OP1840CX system, the MA1840 development software, sample tests and routines developed by third party vendors. This equipment was developed to simulate the true high-speed operating environment that will be experienced on the SCSI bus.

Applications:

• Engineering Development
• Technical Support
• Equipment Verification Testing
• Field Service/Support
• Customer Problem Duplication
• Manufacturing Testing
• Quality Control
• Incoming Inspection
• Product Life Testing
• Target Emulation
• Multi-Initiator Testing
• Media Duplication/Verify
• Sales Demonstrations
• SCSI Training Aid

Interfaces OP1850 —Each OP1850 tests 16-bit wide and 8-bit narrow devices from zero to 40 MB/second, Single Ended or Low Voltage Differential. A single connector allows both Single-Ended and Low Voltage Differential access. The interface type being used is automatically sensed and configured. Termination for both interfaces are present on the card, and hardware or software selectable.  The interface type may be switched under software control to allow testing of both interface types without moving cables, switches, and terminators. 

Programming Languages—Libraries allow all SCSI I/II/III operations to be accessed using the C/C++ language, plus a "macro" language compiler is available that allows RISC processor level performance.

On-The-Fly Data Compare—The OP1850 contains a standard 256K-byte data buffer and data-compare hardware. This hardware is capable of comparing incoming SCSI data with the contents of the buffer. The data compare takes place at a full-sustained 40MB per second of infinite data transfer lengths. This feature allows data-compare tests to run in a fraction of the time of other test devices that compare data after the transfer has completed.

Odd Byte Transfers—The OP1850 is capable of odd-byte transfers on both wide and narrow data buses. This feature is required when developing and testing tape or other variable-record-length devices.

Operating Modes—"Normal" mode is a high-level automatic operation of each SCSI command. In this mode arbitration, selection, messages, commands, status, data, synchronous negotiation, wide negotiation, multi-messages, disconnect, reconnect, linked, phase retries, parity errors, data compare, etc. are handled automatically with each command. "Micro-programming" mode allows control of the bus to the phase, parity, bit and byte level in either Target or Initiator roles. Modes may be mixed within the same test.

Processor—Each OP1850 contains its own RISC processor, DMA data-buffer memory, instruction memory, shared memory, clock, and multi-tasking operating system. Each OP1850 is independent of the PC and each other.

Data Rate / Offset / Parity / Synchronous / Asynchronous / Wide / Narrow—With each device configured, data may be generated or compared for parity and content at a sustained 40.0 MB per second (forward or backward) with offsets from 1 to 15. Parity may be selected odd, control or ignore, with infinite length records, synchronous, asynchronous, narrow or wide. Devices under test are not required to be same since the OP1850 treats each device uniquely for data rate, offset, synchronous, asynchronous, wide or narrow.

Devices Per Card—Each OP1850 card is capable of testing up to 15 Wide devices or 7 Narrow devices.

OP1850 Cards In Same PC—Using the supplied "Monitor" program, the user has control of functions and configurations of up to four independent OP1850 cards within the same PC using a single program function. All OP1850 cards are independent, so testing four independent strings simultaneously is possible. Using Windows 95 or Windows 98, a DOS window may be opened for each card allowing more cards to be operational in the same PC at the same time.

On-Board Multi-Tasking—When more than one device is configured on an OP1850, the operating system strives to keep the bus busy, so any command that may be executed to other devices, or reselections from devices, are handled automatically.

Bus Trace Logging—Each OP1850 has an overall bus level trace buffer that logs all bus activity. In addition, sixteen individual device trace buffers log the activity of the specific device. These buffers contain all bus phases encountered plus any Fault Symptom Codes generated during testing with the OP1850. The "bus-view" feature allows a snap shot of the entire bus plus terminator power, differential sense, and termination status at any time.

SCSI-1/2/3 Commands—All SCSI-1, SCSI-2 and SCSI-3 commands are implemented plus user-defined 6-, 10- and 12-byte commands. Devices Supported are Sequential, Direct, CD-ROM, Write-Once, Optical, Changer, Juke-boxes, Printer, DVD, Processor, Scanner, and Communication devices.

Time-outs—If enabled, time-outs of each phase are may be selected from 10 ms to 2.55 min. Selection and reselection time-outs may be selected from 1.5 ms to 390 ms.

PC Involvement—The PC is used for loading functional code, batch testing, diagnostics, changing testing options and configurations. Under test control, output may be generated and routed to screen, disk file, or printer.

Technical Support—Using the "Monitor" program and the internet, the entire contents of the OP1850 may be downloaded to our technical support to determine the cause of test failures. If new OP1850 firmware code is required, or a new function to be added, the code may is downloaded directly to the user for immediate updates.

Physical/Electrical/System—12-in. long (OP1840) and 10-in. long (OP1850), 16-bit ISA slot, +5 Volt power, unused 32K PC address block. Operates under Windows 3.1/95/98. DOS operations: DOS 3.1 or higher, floppy drive, 340k memory. 286 or higher.