Fastlane Z3 SCSI-2 Controller

FastLane Z3 SCSI-2 Controller by Ian A. Clark

The Z3 FastLane is a Zorro III Fast SCSI-II DMA controller for the A3000 or A4000 with transfer rates of approximately 7MB/sec Asynchronous and 10MB/sec synchronous operation. It will support devices with SCSI, SCSI-2 and Fast SCSI-2 interfaces. It also has provision for up to 64MB memory (256MB as an option) in the form of standard 30-pin SIMM modules. RAM speeds supported are 60, 80 or 100ns. It is compatible with Buster revisions -09, -10 or -11.

For fitting inside the A4000/040 with version 3.0 68040 processor boards, a 74FCT240 clock driver chip is also provided. This replaces the original 74FCT244 chip at position U103 on the motherboard, directly under the processor daughter-board.

For fitting inside the A3000, the Buster revision level MUST be -09 or higher.

Software is also provided, on a single floppy, in the form of Workbench and CLI utilities for configuration and control of SCSI devices, a CDROM filesystem and a memory cache utility.

(Editor's note: a Usenet post by David A. Newman states that board revision 2.4 is the most current, with 2.3 and 2.2 also available. Revision 2.2 boards under serial number 31001650 may require a patch by Phase 5 Germany to work with a Broadcaster Elite or DBC32. Use with a 68060 may require a new ROM from Phase 5.)

Board Layout
� _______________________________________________________________
�|�� ------------------- -------------------�� |___
�|�� ------------------- -------------------�� CONFIG�� |
�|�� Memory bank 4�� Memory bank 4�� :::::�� |
�|CPS� ------------------- -------------------�� 43210�� |::|#
�|:�� ------------------- -------------------�� |::|#
�|::�� Memory bank 3�� Memory bank 3�� |::|# External
�|�� ------------------- -------------------�� |::|# SCSI
�|�� ------------------- -------------------�� |::|# port
�|�� Memory bank 2�� Memory bank 2�� |::|# (Centronics)
�|RSIZ ------------------- -------------------�� |::|#
�|:::: ------------------- -------------------�� RAMSPD�� |::|#
�|::�� Memory bank 1�� Memory bank 1�� ::::::�� ^^ |#
�|____________________________________________________________||_|
�� ||||||||||||||||||||||||||�� || |
�� |Internal SCSI
�� |
�� Terminator SIPs

Jumpers

�CONFIG: SCSI Device Configuration Jumpers

�0 - Debug mode�� open�� default

�1 - Reserved�� open�� default

�2 - Slow inquiry mode.� open�� default
�� closed�� Lengthens time to wait for device response.
�� Used with older drives.

�3 - Slow cable mode�� open�� default
�� closed�� Only if transmission problems occur with
�� cables that are longer than 5M.

�4 - Syncron Auto-enable open�� Z3 examines RDB information on SCSI disks to
�� closed�� determine whether to operate in Synchronous
�� mode. This jumper is closed by default.

� RAMSPD: RAM Speed And Bank Size Jumpers

� This jumper block allows speed settings to be set (40, 60, 80 & 100ns). The
� 40ns setting is currently not supported.

� The two right-hand jumpers are used for memory configurations, which are
� detailed below.
�

�� o o o o o o

�� o o o o o o
�� ^ ^ ^ ^
�� | | | |
�� | | | 100ns
�� | | |
�� | | 80ns (default)
�� | |
�� | 60ns
�� |
�� 40ns

� It is possible to use 70 ns SIMMS by setting the jumper to 60 ns. It can be
� dropped back to 80 ns if problems arise due to the tolerance levels of the
� modules.

� The 60 ns setting will provide memory speeds which are approx 95% of that
� on the motherboard.

� Memory Configurations

� Standard 30-pin SIMMs are used, either 36-bit (PC) or 32-bit, so SIMMS
� generally advertised as either 1Mx9 or 1Mx8 can be used. 4MB and 1MB SIMMS
� can be mixed (see below) but not in the same bank.

� Memory must be fitted in groups of four SIMMS to completely fill each bank,
� and must be the same size in each bank, therefore the minimum configuration
� for 1 bank would be 4MB (4x1MB SIMMS) and the maximum 16MB (4x4MB SIMMS)

� An upgrade kit can be provided which will allow the use of 16MB SIMM
� modules. However, once fitted, you can no longer use 1MB SIMMs, but you can
� mix 4MB & 16MB.

� Total�� --------Memory installed on-------�� Config
� Memory� Bank 1�� Bank 2�� Bank 3�� Bank 4�� Setting

�� 4�� 4MB�� 1
�� 8�� 4MB�� 4MB�� 1
�� 12�� 4MB�� 4MB�� 4MB�� 1
�� 16�� 4MB�� 4MB�� 4MB�� 4MB�� 1
�� 16�� 16MB�� 2
�� 20�� 16MB�� 4MB�� 2
�� 24�� 16MB�� 4MB�� 4MB�� 2
�� 28�� 16MB�� 4MB�� 4MB�� 4MB�� 2
�� 32�� 16MB�� 16MB�� 3
�� 36�� 16MB�� 16MB�� 4MB�� 3
�� 40�� 16MB�� 16MB�� 4MB�� 4MB�� 3
�� 48�� 16MB�� 16MB�� 16MB�� 4
�� 64�� 16MB�� 16MB�� 16MB�� 16MB�� 5

�CPS: Config Page Select jumpers

�RSIZ: RAM size jumpers

�These two jumper blocks determine the memory configuration.� Each configuration
�setting has been allocated a number on the chart above and are detailed below.

�Setting 0: Memory off, or no memory fitted.

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