Memory Functions

setupMemory

Get the inital low memory and allocate areas into the memory map

• IN: Nothing
• OUT: Nothing

memBytesToBlocks32

Calculate how many blocks are required to allocate from the size in bytes

• IN: AX:DX = Size in bytes
• OUT: BX = Blocks (1 block = 512 bytes)

memBlockToAddress

Convert the block into a segment and offset address

• IN: CX = Block to get the address of
• OUT: ES:DI = Pointer to the corresponding block

memAddressToBlock

Convert the segment and offset address into a block

• IN: ES:DI = Pointer to memory address
• OUT: CX = Block corresponding to the address

memAllocNextBlock

Allocate the next available block in memory

• IN: Nothing
• OUT: ES:DI, CF = Pointer to memory address, Carry flag set on error

memAllocBlocks

Allocate the next available blocks in memory

• IN: BX = Blocks to allocate (1 block is 512 bytes)
• OUT: ES:DI, CF = Pointer to memory adress, Carry flag set on error

memAllocBytes

Allocate the next available bytes in memory

• IN: AX:DX = Size in bytes
• OUT: ES:DI, CF = Pointer to memory address, Carry flag set on error

memFreeBlock

Free the block in memory related to the address

• IN: ES:DI = Pointer to memory address
• OUT: Nothing

memFreeBlocks

Free the blocks in memory related to the address

• IN: ES:DI, BX = Pointer to memory address, Blocks to free (1 block is 512 bytes)
• OUT: Nothing

memFreeBytes

Free the bytes in memory related to the address

• IN: ES:DI, AX:DX = Pointer to memory address, size in bytes
• OUT: Nothing

allocMemAddress

Manually allocate an address into memory

• IN: ES:DI, AX:DX = Pointer to memory address, size in bytes
• OUT: CF = Carry flag set on error