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Amiga Technical References
Apollo 1240/1260 Jumper
Jumper off (open) on (closed)
RAM RAM on the Apollo board OFF ON
SCSI Autoboot SCSI Interface OFF ON
060 68040 CPU Installed OFF 060
- RAM Jumper:
- PLEASE NOTE: The accelerator board is only capable of high performance if
FastRAM is fitted. If FastRAM is disabled, only a minimal increase in
performance will be obtained.
- SCSI Jumper:
- The SCSI interfaces autoboot function should be switched off, if no or no
autobootable SCSI devices are connected. If the autoboot function is enabled,
the operation system will wait upto 30 seconds to detect any slow but bootable
SCSI devices. SCSI devices can still be used with autoboot function disabled.
Obviously they will not boot, but it prevents the 30 second delay occuring
before booting will occur from a non-SCSI device.
- CLK Jumper:
- The 68040 processor has to be supplied with the double external clock
frequency. A 68040RC40 (40Mhz) CPU is operated with an 80MHz crystal
The 68060 process (with 50MHz) is operated with it's external bus
The CLK jumper is used to adjust the corresponding clock distribution as
68060-CPU (50MHz) installed position 060
68060-CPU (66MHz) installed position 040
Copyright © 2000 Amiga Auckland Inc. All rights reserved.
Revised: June 16, 2005.