AllocMem(d0/d1) -198(a6)

[nitrologic]

Expand the ACID500 exec with memory allocation service.

Add allocation heaps to chipmem and fastmem address spaces.

Display block usage on a memory map in monitor.

[nitrologic]

A shit simple implementation (note note) for class acid68000:

int heapPointer = 0x60000;

// TODO - round size to page boundary

int allocate(int size, int bits) {
    int p = heapPointer;
    heapPointer += size;
    return p;
}