Hum having a differential signal is quite interesting, perharps they where thinking on faster MCs...

I have order a Dualshock 2 to do some testing, I was planing to put some tape ok BC and run GTA:VC, if my memory recalls correctly it uses the analogue feature on Dualshock 2 buttons to accelerate ...

Ok on the PSX that pin is "chassis ground" and SASx doesn't exist also on the official Dualshock 1 that pin is NC, hence I still think that this pin is used somehow for compatibility between PSX and PS2.

On PS2 IOP
SAS0 -> Is connected to the Dualshock port 1 and it is pulled up.
SAS1 -> Is ...

Pin 8 (INT) is the interrupt line which is only used by lightguns mainly, but perhaps some special PS2 devices may use it too.

No idea what SAS is. That terminology isn't used.

http://www.psxdev.net/forum/download/file.php?mode=view&id=279&sid=8b3ffa8ee8bc019b05e3461de1a1a071


Thanks for ...

Hi,

I am being checking the service manuals for the psx and PS2 in order to try to fix my old PS2.

I have seen that no one mention the signals SAS and INT since they are not used by the DualShock.

I would like to know if there is any periferic that use them and what are they for.

Btw the SAS ...

Thanks this satisfaces my curiosity.

hum, I just realized that the PSX supports multi-threading so perhaps that is the part that I was missing.... if I can assume that there is no memory protection between threads it would be fairly easy to manipulate other thread variables....

Hi everyone, I being reading for awhile about how a PSX cheat cartridge actually works but there is some parts that I not fully understand.

I think that I am right to suppose that the PSX Bios checks if the string "Licensed by Sony Computer Entertainment Inc." is present at 0x1F000004 and if so it ...

Ok my mistake the pin 8 on the controller is connected to the hardware interruption 10. DSR0 is the ACK line so a complete port mapping would look like:

1 -> RXD/RXD.0
2 -> TXD/TXD.0
3 -> 7.2V
4 -> GND
5 -> 3.3V
6 -> ATT/CE/DTR0x (Left Port -> x = A or Right Port -> x = B)
7 -> CLK/SCK0
8 -> IRQ10 ...

Hello Everyone,

I am trying to understand how the PSX game port works and more or less I have reached a point that I have an idea. However in every place that I have read, I have seen that the pin 8 is not connected which actually from the psx perspective this is not true. That pint is connected to ...