Panasoft PAC
This page was last modified 04:23, 18 January 2021 by Mars2000you. Based on work by Rderooy and Gdx.



The PAC (Pana Amusement Cartridge) is a cartridge from Panasoft that contains 4KB SRAM for saving game states. Its product code is SW-M001.

The 4kB is divided into 8 slots of 512 Bytes each. A game may use one or more slots to save its data. Some games allow you to select which slots to use, others are hardcoded to use certain slots. It is up to the user to ensure he does not overwrite old save states from the game, or save states of other games. There is a possibility to backup save states to disk.


Panasoft PAC cartridge box scan
Panasoft PAC cartridge scan
Panasoft PAC cartridge
Panasoft PAC PCB
Panasoft PAC PCB underside

Backup/Restore save states

Unlike the Panasoft FM-PAC, the PAC does not come with any software to backup or restore the save states.

There are however a few ways. One way is to have a Panasoft FM-PAC in addition to a PAC inserted, you can then run the FM-PAC software (by entering CALL FMPAC from BASIC), and copy the contents of both the FM-PAC and the PAC. Alternatively there is a tool to make backups, see this thread for details.


The PAC (and likewise the Panasoft FM-PAC) has a battery, without it the SRAM will not keep the contents when the system is switched off. This coin cell battery can be replaced, you need to open the cartridge and replace the battery with a new one (type: Panasonic BR2325 Lithium 3V). See this thread for details.

Typically a PAC compatible game will have one of these logo's on the box. They may also indicate which save slots they need.

PAC Logo
PAC Logo
PAC Logo, indicating the game needs slot 8
PAC Logo, indicating the game needs slot 1-4

External links