There are 2 SIMM sockets in the GVP A530 Turbo that utilize GVP SIMM32 design. You can use up to two 1 Meg SIMM32's, or two 4 Meg SIMM32's. You cannot mix 1 and 4 Meg SIMM32's together.
The GVP A530 Turbo has a PGA socket for a 68882 FPU. This can only be a 40MHz rated part since there is no seperate socket for an oscillator. Putting a slower FPU in this socket could result in permanent damage to the FPU and possibly the A530 Turbo.
The GVP A530 Turbo has a fully Commodore RDB compliant SCSI interface. There is a 50 pin IDC socket inside as well as room for a 3.5"LP hard-drive. There is also an external DB25F SCSI port for connections of external SCSI devices.
GVP A530 Turbo Jumper Settings:
Jumper Open Closed Default J1 MMU Enabled * MMU Disabled Open J2 Turbo Off Turbo On Switched J3 Cache Enabled Cache Disabled Open J4 Reserved Closed J5 Reserved Open J6 Reserved Closed J7 Reserved Open J8 SCSI ROM N/A Open J9 Non-Autoboot HD Autoboot Closed J10 Reserved Open J11 RAM Installed No RAM Installed Open J12 Reserved Open J13 1MB SIMMs Installed 4MB SIMMs Installed Open CN7 Reserved Pins 1 & 2 CN8 Reserved Pins 2 & 3 CN11 Reserved Pins 2 & 3 CN14 Fan Connection CN18 Reserved Pins 1 & 2 * The 68EC030 chip used with most A530 Turbo accelerators does not have a Memory Management Unit. Instead, GVP provides alternate memory mapping technology. If a 68030 with MMU is substituted for the 68EC030, this jumper provides a means of disabling that chips MMU. This feature may be of interest to software developers who require a machine without MMU.