Processor:040@40Mhz or 060@50Mhz
Max Ram:128MB
Ram Type:4 x 72pin SIMM slots and 4 x GVP 64pin SIMM slots. (See notes below about use)

An accelerator for the A2000 which plugs into the CPU Fast slot. The card has the ability to take either the standard 72pin SIMMs, or the superior but proprietary GVP 64pin SIMMs. Please note that GVP 64pin SIMMs are not necessarily compatible with the various other 64pin SIMM formats which exist. Each 72pin SIMM slot is linked to a 64pin SIMM slot, therefore if you have a 72pin SIMM plugged in, you cannot also use a 64pin SIMM in the corresponding slot and vice versa. The card contains a DMA SCSI-II controller which provides an internal 50pin connector, and an external 50pin connector which supports autobooting. The card allows you to shadow the Kickstart into Fast RAM for improved performance, and has a 68000 fallback mode for compatibility with old software. In order you use this card you must be running at least Kickstart 2.04 and have a motherboard which is revision 4.5 or higher. By default the card never came with a heatsink or fan installed on the CPU. It may be necessary to add a heatsink and fan, especially to the 040 version. If you find your card's operation is flaky, make sure you are using the latest version of SetPatch available for your OS version.


Jumper OPEN (off) Position CLOSED (On) Position Default
J3clock enabledclock disabledOFF
J4CPU 68000CPU 68040/060ON
J5No DTACK pull-up resistorDTACK pull up enabledOFF
J6Active SCSI termination enabledActive SCSI Termination disabledOFF
J7DMA ignores interruptDMA Back Of interruptOFF
JR1Non Burst mode (any number of SIMMS)Burst Mode (increments of 2 SIMMS)ON
JR2DRAM vs CPU speedsee chartOFF
JR3Burst Write DisabledBurst Write EnabledON
JR4Burst Read DisabledBurst Read EnabledON
JR54MB GVP simms installed16MB GVP SIMMS installedOFF
JR6Single sided 72pin SIMMs usedDouble sided 72pin SIMMS usedOFF
JR82k or 4k refresh4k refresh onlyOFF
PINS 1 & 2
PINS 2 & 3
J1CPU power 5V (68040 only!)CPU power 3.3V (68060 only!)*
J2CPU Clock Selection for 040CPU Clock Selection for 060*
J9ROM type 27C256 (VCC)ROM type 27C512 (A161&2
J1012 Volt Fan (do NOT change!)
J115 Volt Fan (do NOT change!)

CPU Vs.68060 50Mhz68040 40Mhz68040 33MhzJR2 Settings

Page contributors: Emery Premeaux, Frank Cieslewicz, Mario Misic
Updated: 12/22/2004 . Added: 12/22/2004