Search found 5 matches

by lordrafa
August 5th, 2020, 9:47 am
Forum: Input/Output
Topic: Can anyone tell me how the Xploder works?
Replies: 3
Views: 624

Re: Can anyone tell me how the Xploder works?

Thanks this satisfaces my curiosity.
by lordrafa
July 20th, 2020, 2:46 am
Forum: Input/Output
Topic: Can anyone tell me how the Xploder works?
Replies: 3
Views: 624

Re: Can anyone tell me how the Xploder works?

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....
by lordrafa
July 20th, 2020, 1:49 am
Forum: Input/Output
Topic: Can anyone tell me how the Xploder works?
Replies: 3
Views: 624

Can anyone tell me how the Xploder works?

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 w...
by lordrafa
July 27th, 2018, 5:09 am
Forum: Hardware
Topic: PSX game port
Replies: 1
Views: 3640

Re: PSX game port

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/I...
by lordrafa
July 21st, 2018, 7:33 am
Forum: Hardware
Topic: PSX game port
Replies: 1
Views: 3640

PSX game port

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 ...