I don't really understand how that's different to other systems though. I mean, the inventory system I've always used is really simple, yet it can handle unlimited items with extra properties as well. QoM's code is kinda like this:
IF playerweapon$ = "Rusty Dagger" THEN
playerWC = playerWC + 10
playerhit = playerhit + 3
END IF
IF playerweapon$ = "Battle Axe" THEN
playerWC = playerWC + 20
playerhit = playerhit + 5
END IF
IF playerweapon$ = "Long Sword" THEN
playerWC = playerWC + 35
playerhit = playerhit + 8
END IF
IF playerweapon$ = "Rapier of Quickness" THEN
playerWC = playerWC + 40
playerhit = playerhit + 3
STATdexterity = STATdexterity + 4
END IF
IF playerarmor$ = "Cloak of Endurance" THEN
playerAC = playerAC + 25
playerdef = playerdef + 6
STATendurance = STATendurance + 3
END IF
This is how to set the properties of weapons and armors. The first parameter in the array is the item's name, the second parameter is the Attack plus it gives in combat, and the third parameter is the Defence plus it gives in combat.
Weapon1Stats$ = "RustyDagger 10 0"
Weapon2Stats$ = "BattleAxe 14 0"
Weapon3Stats$ = "LongSword 20 0"
Armor1Stats$ = "LeatherVest 0 8"
Armor2Stats$ = "ChainMail 0 12"
Armor3Stats$ = "SpikedCuiras 3 17"
How to set the player's weapon/armor properties to that of another item: (in other words, how to equip an item)
PlayerWeaponStats$ = Weapon1Stats$
PlayerArmorStats$ = Armor1Stats$
How to reference the properties of an item:
PlayerWeaponName$ = WORD$ PlayerWeaponStats$ 1
PlayerArmorName$ = WORD$ PlayerArmorStats$ 1
WeaponAttackPlus$ = WORD$ PlayerWeaponStats$ 2
ArmorAttackPlus$ = WORD$ PlayerArmorStats$ 2
WeaponAttackPlus = VAL WeaponAttackPlus$
ArmorAttackPlus = VAL ArmorAttackPlus$
WeaponDefencePlus$ = WORD$ PlayerWeaponStats$ 3
ArmorDefencePlus$ = WORD$ PlayerArmorStats$ 3
WeaponDefencePlus = VAL WeaponDefencePlus$
ArmorDefencePlus = VAL ArmorDefencePlus$
Attack = Attack + WeaponAttackPlus
Attack = Attack + ArmorAttackPlus
Defence = Defence + WeaponDefencePlus
Defence = Defence + ArmorDefencePlus
It's fairly straight forward. You shouldn't have to edit any of the code to use it, so you don't even have to understand it. All you have to do is set the values of "Weapon1Stats" "Weapon2Stats" and so on. If you do understand it however, you could add extra parameters such as attribute bonuses or durability. Or even the item's sell price. :) It's easy to mod.