A4000 Accelerators

ID #3084

Phase 5: Cyberstorm Mk-I 040/060


Connection: CPU Fast Slot (A3000/A4000)

Cyberstorm showing all the modules connected.
Cyberstorm showing all the modules connected.

Cyberstorm with individual modules
Cyberstorm with individual modules

cs1boarddiag.jpg

cs1simmboard.jpg

csmk1ramjump.gif

Processor:040@25Mhz, 040@40Mhz or 060@50Mhz
FPU:Internal
MMU:Internal
Max Ram:128MB
Ram Type:4 x 72pin SIMM slots.

The Cyberstorm Mk-I is of a modular design and comes in three main parts (4 if you include SCSI II). The main part called the carrier board actually connects into the processor slot on the motherboard. The next component is referred to as the processor daughterboard. This is a small card which contains either an 040@25Mhz, 040@40Mhz or an 060@50Mhz, and usually contains a heat sink and/or fan. The processor daughterboard connects on top of the carrier board in parallel. The third component is the memory daughterboard. This contains 4 x 72pin SIMM slots for adding up to a maximum of 128MB and supports SIMM sizes of 4MB to 32MB in mixed configurations. The memory daughterboard is fitted to the carrier board on top but at right angles. If no memory is intended to be added to the memory daughterboard then it does not have to be fitted. It may not be possible to physically fit this card in a standard A3000 desktop and it may also be necessary to perform an INT-2 modifcation, but this has not been confirmed. If you have the SCSI-II module attached, it may conflict with the internal SCSI controller in an A3000 series machine.

Jumper Settings

For an 040@25Mhz, the jumper marked INT on the A4000 motherboard needs to be set for the Internal Clock Signal. For an 040@40Mhz and 060@50Mhz the jumper needs to be set to EXT for an external Clock Signal.

Main Jumpers

Jumper NamePositionFunction
IPENDONNo mainboard CPU
CBRONCPU on mainboard
DIAGPos 1-2Enable Diagnostic ROM
Pos 2-3Disable Diagnostic ROM
ROM SizePos 1-216bit ROMs
Pos 2-38bit ROMs
ROM CountPos 1-2Two ROMs Installed
Pos 2-3One ROM Installed
JPAPos 1-2Normal RAM Access
Pos 2-3Fast RAM Access
OPENSlow RAM Access
MB BurstPos 1-2Enable MainBoard burst access
Pos 2-3Disable MainBoard burst access

RAM Jumpers

Total RAMBank 0Bank 1Bank 2Bank 3Jumper Reference
See Diagram Below
4/8/12/16MB4/0MB4/0MB4/0MB4/0MBA
8/12/16/20MB8MB4/0MB4/0MB4/0MBB
16/20/24/28MB16MB4/0MB4/0MB4/0MBC
32/36/40/44MB32MB4/0MB4/0MB4/0MBD
16/20/24MB8MB8MB4/0MB4/0MBE
24/28/32MB16MB8MB4/0MB4/0MBF
40/44/48MB32MB8MB4/0MB4/0MBG
32/36/40MB16MB16MB4/0MB4/0MBH
48/52/56MB32MB16MB4/04/0I
64/68/72MB32MB32MB4/0MB4/0MBJ
24/28MB8MB8MB8MB4/0MBK
32/36MB16MB8MB8MB4/0MBL
48/52MB32MB8MB8MB4/0MBM
40/44MB16MB8MB8MB4/0MBN
56/60MB32MB16MB8MB4/0MBO
72/76MB32MB32MB8MB4/0MBP
48/52MB16MB16MB16MB4/0MBQ
64/68MB32MB16MB16MB4/0MBR
80/84MB32MB32MB16MB4/0MBS
96/100MB32MB32MB32MB4/0T
32MB8MB8MB8MB8MBU
40MB16MB8MB8MB8MBV
56MB32MB8MB8MB8MBW
48MB16MB16MB8MB8MBX
64MB32MB16MB8MB8MBY
80MB32MB32MB8MB8MBZ
56MB16MB16MB16MB8MB1
72MB32MB16MB16MB8MB2
88MB32MB32MB16MB8MB3
104MB32MB32MB32MB8MB4
64MB16MB16MB16MB16MB5
80MB32MB16MB16MB16MB6
96MB32MB32MB16MB16MB7
112MB32MB32MB32MB16MB8
128MB32MB32MB32MB32MB9

Bank 0 is closest to the connector. The largest SIMM must always be placed in bank 0, with the second largest in bank 1 and so on.

Contributions to this page by:
Antoine Dubourg

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Last update: 2009-01-25 12:47
Revision: 1.0

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