| Processor: | 060@50Mhz |
| FPU: | Internal |
| MMU: | Internal |
| Max Ram: | 128MB |
| Ram Type: | 4 x 72pin SIMM slots. |
An accelerator which plugs into the CPU Fast slot. It also includes an onboard SCSI controller (Symbios Logic 53C710) with a 50pin internal connector.
Jumpers
| Jumper | Function |
|---|---|
| JP1 | CPU Select ON=68060 OFF = Motherboard Processor |
| JP2 | RESERVED |
| JP4 | Cache Burst to A4000 Motherboard ON = Enabled OFF = Disabled |
| JP5 | Interrupt Pending, DMA Backoffs ON = DMA Backsoff Interrup OFF = DMA Ignores Interrupt |
| JP6 | Active SCSI Termination ON = SCSI Termination Disabled OFF= SCSI Termination Enabled |
| JP7 | CPU Clock Disable (Test Only) ON = Clock Disabled OFF = Clock Enabled |
| JP8 | CPU Clock Pins 1 and 2 = 68040 Pins 2 and 3 = 68060 |
| JP9 | CPU Power Pins 1 and 2 = 5V (040) Pins 2 and 3 = 3.3V (060) |
| CN6 | 5V Fan |
| CN8 | SCSI LED Indicator |
| JR1 | Memory Burst Mode ON = Burst Mode Support (Min 2 SIMMs Required) OFF = Non Burst Mode |
| JR2 | DRAM Speed versus CPU Clock OFF @ 50 Mhz OFF = 60ns @ 50Mhz ON = 70ns @ 40Mhz OFF = 60/70ns @40Mhz ON = 80ns @ 33Mhz OFF = 60/70/80ns |
| JR3 | Burst Write Enabled ON = Write Enabled |
| JR4 | Burst Read Enabled ON = Read Enabled |
| JR5 | Memory Size ON = 16MB OFF = 4MB |
| JR6 | SIMM Type OFF = Single Sided ON = Double Sided |
| JR7 | Reserved |
| JR8 | Refresh Mode OFF/ON = 4k Refresh (Asymmetrical) OFF = 2k (Symmetrical) |
All four SIMM sockets can support either 4MB or 16MB single sided SIMMs or 8MB or 32MB double sided SIMMs, depending on the settings of JR5 and JR6 as shown below
JR5 OFF, JR6 OFF
CN1 8000000-83FFFFF
CN2 8400000-87FFFFF
CN3 8800000-8BFFFFF
CN4 8C00000-8FFFFFF
JR5 OFF, JR6 OFF
CN1 8000000-8FFFFFF
CN2 9000000-9FFFFFF
CN3 A000000-AFFFFFF
CN4 B000000-BFFFFFF
JR5 OFF, JR6 ON
CN1 8000000-8FFFFFF
CN2 8800000-8FFFFFF
CN3 9000000-97FFFFF
CN4 9800000-9FFFFFF
JR5 ON, JR6 ON
CN1 8000000-9FFFFFF
CN2 A000000-BFFFFFF
CN3 C000000-DFFFFFF
CN4 E000000-FFFFFFF
Note: Burst Mode will only function properly when there are an even number of SIMMS
Thanks to Mark Smith and Michael Mellendorf