Yul memory storage

assembly.sol

pragma solidity 0.8.18;

contract Assembly {

    uint256 a = 9; // Slot 0
    uint256 b = 8; // Slot 1
    uint256 c = 7; // Slot 2
    uint256 d = 6; // Slot 3
    uint8 e = 4; // Slot 4
    uint8 f =5; // Slot 4
    uint128 g =34; // Slot 4
    uint128 h = 23; // Slot 5

    function learningMemory(bytes32 a) public {
        assembly {
            sstore(0x80, a) // the free memory pointer points to 0x80 initially. We add 32 bytes (128+32 = 160)
            sstore(0xa0, 0x7465737400000000000000000000000000000000000000000000000000000000) // next memory position is 160 = 0xa0
        }
    }

    function learningStorage(uint256 num) public view returns (bytes32 result) {
        assembly {
            result := sload(num)
        }
    }
}