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kalymos
2017-06-04 15:16:11 +02:00
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@@ -53,5 +53,52 @@ A lot!
- The /xlat signal is no longer required to time the PAL SCPH-102 NTSC BIOS-patch
- Only AVR PORTB is used for compatibility reasons (almost all the AVR chips available have PORTB)
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A minor detail: The lid detection is missing its digitalRead() ;p
rama3
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Update 7th of May 2017
Branched and tweaked for use with the Position 0 switch on a PSX laser.
(Requires a bit of sticky tape at the point where the switch touches the laser assembly.)
This allows deterministic SCEX injections, without relying on timing. Also gets rid of connection wires for LID and RESET.
WIP!
rama3
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Update 15th of May 2017
PSNee now watches the subchannel data and looks at the position information contained within.
This allows deterministic SCEX injections. It knows (almost) exactly when to inject the SCEX string.
Therefore it is now a stealth modchip :)
Required connections: GND, VCC, data, gate, SQCL, SUBQ
No more need to watch the PSX reset or lid open signals or any other typical modchip points (like "sync")
WIP! Only tested on PU-18 board. Should work fine on PU-7, PU-8, PU-18 and PU-20.
Will need adaption for PU-22 to PU-41 (SCPH-750x, 900x and PSOne).
Note: Once this is installed in a PSX, mind the Pin13 LED that many Arduino boards have. Do not upload new sketches while the PSX is on!
(If the PSX is on while uploading a sketch (making the LED blink), a voltage will be fed back into the SCLK pin on the HC-05 in the PSX.
This didn't break my PSX in testing but it does stun the chip and halt CD operation. I'm thinking of a better method to do this but for now I need Arduino pin13..)
Very much recommended to install a 3.3V chip!
rama3
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Update 27th of May 2017
This version is compatible with 8Mhz and 16Mhz ATmega328 / Arduino boards.
It uses polling to grab the SUBQ packets. This works better than relying on interrupts.
I even have a few cycles to spare on a 8Mhz chip!
rama3
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Update 31st May 2017
- supports all motherboard versions except PU-41 (PAL) (will get to it!)
- WFCK modulated injection method for PU-22 and up, just like the last multimode 3 chips
- minimized CD controller interference: PsNee only ever speaks when it has to (also: full stealth)
- not relying on BIOS delays: perfect boot disregarding extension cards etc
- might not be bug free! I'm just one guy and testing on a dozen consoles takes time ;)
rama3
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Update 4 June 2017
- unified SCEX injection function / easier to read code
- PU-22+ now work without the WFCK wire (but depends on tight timings, tested on 8 and 16Mhz mcu)
- interrupts disabled while sampling SUBQ > much better performance capturing all events correctly
- now blinks the built-in LED on injections for debugging