AMIGA 4000 RAM SPEED NS SERIAL NUMBERS

boards with these serial numbers had to be sent back to Phase5 for rework.

in an A4000 with a Fastlane or a A4091 SCSI controller installed, peripherals connected to the SCSI bus are not recognized.

does not work in the A4000T with RAM installed on the CyberStorm.

SCSI units connected to the internal SCSI bus of the A3000(T) are not recognized while having RAM installed to the CyberStorm.

CyberStorm 040 SN# B400506 - B400569 and CyberStorm 060 SN# B002827 - B003065 are affected by several DMA related problems due to a slight difference in the electrical specifications of certain parts caused by supplier change.

AMIGA 4000 RAM SPEED NS UPDATE

needs update for installing the SCSI module.

contains the updatable CyberStorm firmware.

this automatic resistor finds out on its own whether it is the last piece of equipment on the backbone and switches itself on if this is the case.

the module itself is not equipped with termination resistors they are placed on a separate PCB which houses the external 50 pin micro-D SCSI connector.

requires the INT2 signal which is not present in the A3000's CPU slot.

does not fit mechanically into a desktop A3000.

Optional Fast SCSI 2 module - CyberSCSI Mk2

RAM access is 70 ns even with 60 ns SIMMs.

improved access to chip RAM using a write buffer.

onboard logic maps any combinations of SIMMs into one contiguous block without the need of jumpers.

four 72 pin SIMM sockets can accept 128 MB RAM.

all of these hard disks are ST-506 drives.

A2094: A2090A bundled with a 45 MB Toshiba MK-134FA or a 46 MB Rodime RO-3055 hard disk.

A2092: A2090A bundled with a 20 MB Miniscribe 8425 hard disk.

AMIGA 4000 RAM SPEED NS MANUAL

the A2090A was sold in kit form which included the controller itself, a hard disk, cables, installation disk and manual.

AMIGA 4000 RAM SPEED NS DRIVER

on Zorro III machines the card only works if the driver and all the buffers are loaded into chip RAM.the ST-506 interface does not support 16-head drives.does not support partitions and drives larger than 256 MB.does not support the SCSI Direct protocol.the Z80 CPU has 2 kB RAM to buffer commands from the Amiga, 8 kB PROM with driver routines and 1 kB RAM for storage of variables.DMA transfers are provided by the custom Commodore 8727 IC featuring a 64 byte FIFO buffer.the 33C93 chip can be controlled by either the 68000 (default) or by the Z80.the ST-506 drives are controlled by the Zilog Z80B CPU.the SCSI drives are controlled by the WD 33C93 IC.supports seven SCSI and two ST-506 devices at once.ON - Delete all control registers upon reset (test purposes) OFF OFF - Login Screen when no password is set (power up) or by pressing F1 ON - No Disconnect/Reconnect allowed, OFF - Disconnect/Reconnect allowed ON - Kickstart 1.2, OFF - Kickstart >= 1.3 after developing this card, Elaborate Bytes sold their entire hardware product range to BSC.DB25 external SCSI connector for both snap-in and screw-in connectors.does not use DMA but interrupt driven programmed I/O.those without case have no passthrough connector, the others have.the A500 and A1000 versions connect to the side expansion port.A1000 RLL (without casing) - only Model 1.A1000 MFM (without casing) - only Model 1.A500 RLL (without casing) - only Model 1.A500 MFM (without casing) - only Model 1.if a Model 1 and a Model 2 controller are installed in one Amiga at once, the Model 2 controls the Model 1 (autobooting is possible on both controllers).

the Zorro II version is full length and has place for mounting a 3.5' hard disk.autoboot ROM - autobooting requires at least Kickstart 1.3.the Zorro II version is half length (only a Zorro - XT adaptor board), the metal hard disk mounting frame is optional.cannot autoboot - by making the driver reset resistent, rebooting off hard disk is possible.supports processor cards and does some optimizations for the better processors.2 is a general hard disk driver software with 16 different hardware versions based on it

Amiga 4000 ram speed ns