"Don't flame if you don't know! MS uses both parallel and serial interface:"

Correct. You shouldn't. but good to see someone taking the time to find out some kind of actual facts.

Ok, so the cards support serial, most people know that. But there is serial and there is Serial.

There are "serial" eeproms. they use the I2c bus and are certainly not compatible with the USB port without interfacing electronics.

There is the serial port on the PC - again not directly compatible with the USB port without interfacing electronics. etc. etc.

the MS need a serial interface controller which is usually the large Chip on the PCB of the card reader. It commonly has a high-performance USB 2.0 card reader controller that integrates a USB 2.0 PHY, an SIE (Serial Interface Engine), an 8051 MCU, a ROM, a RAM, and a memory card controller onto a single chip.

chips such as the RTS5111 supports access to Compact Flash, MicroDrive, Memory Stick, Memory Stick PRO, Secure Digital, MultiMediaCard, Smart Media, and xD-Picture Card.

to understand serial interfacing, refer to the following diagram:
device 1 device 2
RX <-----------> TX
TX <-----------> RX

RX = recieve
TX = transmit

one transmits, the other recieves. They need to talk using the same protocol(language). is the USB protocol programmed into the PSP MS interface? no. remember, to get to the media in the card reader, it has to go through the USB port on the card reader.

The guy that started this thread reckons he has a setup like this:

PSP ms in slot-----USB cable----flash card reader

The microcontroller in the card reader is expecting any connections to the USB port on the serial interface controller chip to be made to another USB port (host controller) - the MS slot in the PSP certainly does not provide that. Unless the guy has made a homebrew card reader, I cannot see how this could possibly work.

Im not flaming, I am just stating facts and opinions, and would like to se any proof to the contrary. a few wires taped to a MS is not that proof.

The only way I can see it working is if he bypasses the usb port altogether, and I doubt it would be a matter of simply connecting some wires.

HaQue