Amiga 500
Expansions
### Expansions

* Expansion ports are limited to a side expansion port and a trapdoor expansion on the underside of the machine. The casing can also be opened up (voiding the warranty), all larger chips are socketed rather than being [TH](/wiki/Through-hole_technology "Through-hole technology")/[SMD](/wiki/Surface_Mount_Device "Surface Mount Device") soldered directly to the motherboard, so they can be replaced by hand.
* The CPU can be upgraded to a Motorola 68010 directly or to a 68020, 68030 or 68040 via the side expansion slot or a CPU socket adapter board.
* The chip RAM can be upgraded to  directly on the motherboard, provided a [Fat Agnus](/wiki/Fat_Agnus "Fat Agnus") chip is also installed to support it.
* Likewise, all the custom chips can be upgraded to the [ECS](/wiki/Extended_chip_set "Extended chip set") chipset.
* The A500\+ model instead allowed upgrading by  trapdoor chip RAM without clock, but there was no visible means on board to map any of this as FAST, causing incompatibility with some stubbornly coded programs.
* There were modification instructions available for the A500 to solder or socket another  RAM on the board, then run extra address lines to the trapdoor slot to accommodate an additional  of fast or chip RAM depending on the installed chipset.
* Up to  of "fast RAM" can be added via the side expansion slot, even more if an [accelerator](/wiki/Hardware_acceleration "Hardware acceleration") with a non\-EC (without reduced data/address bus) processor and 32\-bit RAM is used.
* Hard drive and other peripherals can be added via the side expansion slot.
* Several companies provided combined CPU, memory and hard drive upgradesor provided chainable expansions that extended the bus as they were addedas there is only one side expansion slot.
* Expansions are configured automatically by [AutoConfig](/wiki/AutoConfig "AutoConfig") software, so multiple pieces of hardware did not conflict with each other.

Is it possible to add more than one side expansion slot?