Editing SPEED

== Overview ==
SPEED provides various interfaces to the PS2, including Ethernet, where it functions as a MAC (using an external Ethernet transceiver/PHY), IDE/ATA and an UART (to which the modem connects in case of the north-american-only SCPH-10281 [[Network Adaptor]] and some north-american SCPH-700XX PS2 slim variants). It's connected to the PS2-side via [[SSBUS_controller|SSBUS]] (PCMCIA in SCPH-1X000 consoles). For fat models, it comes inside the network adaptor. For slim models, it comes on the motherboard for SCPH-700XX consoles, with the IDE pins still exposed on the PCB, making it possible to connect a hard drive (which is, however, not practical in most cases, as it requires a lot of wires and soldering). Starting with SCPH-750XX consoles, SPEED was not used anymore, as its functions of an network controller were integrated into the newly developed PPC405-based [[IOP/Deckard]], with the IDE interface being removed entirely.

[[PSX]] has two SPEED-ICs, with one of them being a CXD9731GP (which is probably only used as IDE interface for the DVR DVD drive) and the other one being a physically larger [[CXD9764GP]] (which is a special variant only found in PSX).

Additionaly, it is connected to an external 1k Bit / 128 Bytes EEPROM in both, the Network Adaptor and in SCPH-700XX consoles. In the PSX, the EEPROM is connected to the larger [[CXD9764GP]].

The die of SPEED [https://www.icreversing.com/chips/cxd9624gg has some IBM-markings], which suggest it's been manufactured and potentially developed by IBM.

== Revisions ==
* 1.1: CXD9624GG (used in some earlier [[Network Adaptor]] revisions, including the SCPH-10190 PCMCIA Network Adaptor)
** IBM part number: 08J3955
** Die marking: MT3954A (C) 1998 *M* IBM
* 1.2: CXD9624AGG (used in some earlier [[Network Adaptor]] revisions, including the SCPH-10190 PCMCIA Network Adaptor)
** Adds UART interface for modem (also available in all later revisions)
** IBM part number: 47P0870
* 1.3: CXD9731GP (used in later [[Network Adaptor]] revisions, also used as IDE interface for the DVR DVD drive in PSX, while PSX has it's own variant of SPEED for other purposes)
** IBM (?) part number: 6TM0XBG0001
* 1.3: CXD9731AGP (same version reported as with CXD9731GP, used in all K-chassis/SCPH-700XX slim consoles)
** IBM (?) part number: 6TM0XBG0003
Later slim consoles don't have a dedicated SPEED chip anymore, as the functionality has been integrated into [[IOP]]. These consoles report SPEED version 1.3.

== DVR SPEED (in PSX/DESR) ==
* 1.4: [[CXD9764GP]]
** IBM (?) part number: 6TT6XBG0001