| Processor: |
EC030@40MHz |
| FPU: |
Optional 68882@40MHz (Some versions are PGA, others PLCC) |
| MMU: |
None |
| Max Ram: |
32MB |
| Ram Type: |
2 x GVP 64pin SIMM32 slots. |
A 68030 accelerator which plugs into the trapdoor slot of the A1200. The GVP A1230 uses the custom 64pin GVP SIMM32s, which are not compatible with any other the other 64-pin or 72-pin SIMM format of the era.
This board was known internally as 'JAWS'. BOM details from internal GVP documents can be found here: https://archive.org/details/gvp-jaws-bom
The boards generaly did not come with sockets for the CPU. Therefore the common 68EC030 CPUs are not upgradable to a full MMU-capable CPU or a faster clocked chip.
The board generates a 64K PIC located at $0300.0000 in the expansion list via ROMTag for it's control registers. The ROM also adds the software-detected 32-bit memory into the memory in the range of 0x0100.0000-0x02FF.FFFF.
The GVPCPUCtrl v1.19 tool provides kickstart remap when there is 512K of 32-bit RAM free starting at address 0x02F8.0000, which is at the top end of the lower 8MB of 32-bit RAM address space. It also provides dynamic relocation of the system stack with the MoveSSP option.