The majority of PlayStation development is centred around a standard PC. The recommended minimum is a 488/66 with 16Mb RAM, CD-ROM Drive and a half a gigabyte of local disk space (with a great deal more disk space, either local or accessible via a network, depending on the complexity of your game).   
There are two forms of development systems - one with an ISA interface (the DTL-H2000, requiring a PC with 2 full length ISA slots)), and the newer PCI based version (the DTL-H2500 requires one full length PCI slots, and one other slot ).  The DTL-H2000 system includes two special controllers, for the DTL-H2500 you will need to purchase a DTL-H2080 and some standard controllers.  Both systems have and video and audio out (via composite and S-video cables), connection for an optional PS CD-ROM drive (an external DTL-H2010 for the DTL-H2000 or the internal DTL-H2510 for the DTL-H2500)  and a serial communications port for use with a Link Cable.)
If you are doing a lot of work with both PAL and NTSC, we recommend an RGB SCART cable that can be acquired from Lightwave Cables.  (The part number is SP198, and the cable costs £5.08. Lightwave may be contacted on +44 (0)151-630-5003).
In addition, your PC should have room for at least one additional ISA board - for the CD-ROM Emulator Board (DTL-H2020) ISA Card which itself  requires an additional dedicated SCSI AV hard disk.  (Any good quality, recent (1995+) disk should be acceptable - we’ve  had good experiences with  IBM, Micropolis and Fireball drives).
You also require a television or colour monitor (ideally both PAL and NTSC compatible).
At the moment, SCEE support standard DOS/Windows, but are moving towards Windows ‘95 support.
In the latter stages of development (if not before), you also need to start writing PlayStation format CD-ROMS - this requires the CD Write Once Drive (CDW-900E or the newer CDU921S) unit, which is connected to your PC via a SCSI interface (you will need to buy an additional Adaptec AHA-154x  SCSI card).
Test PlayStation CD-ROM “Gold” discs with either a PlayStation CD-ROM Drive (DTL-H2010)  which attaches to the DTL-H2000, and/or one or more Debugging Stations.  There are three types  Debugging Stations: Japanese NTSC (DTL-H1000), US NTSC (DTL-H1001) or UK PAL (DTL-H1002) to use according to your target markets, and are similar to commercially available machines (with the exception that they allow Gold discs to be run from any territory).
(Note that the internal ROM varies slightly from territory to territory - which is why there are three types of debugging stations.)
You can use any good quality write-once Gold discs for development, but we supply a range of Write Once Mastering Discs (CDR-71PBS) for creating high quality masters to be used for submission to QA and Approvals.
For development of games that  support connected PlayStations playing together, you can buy either a standard Link Cable (SCP-H1040) to connect Debugging Stations together, or a Link Cable for DTL-H2000/H2500 (DTL-H2060) that will allow two Development Board Sets to be linked (but will not connect to a PlayStation).
The Development Board Set’s default Controllers and ISA Board have different plugs and sockets from commercially available Controllers - if you wish to test memory cards or use standard Controllers, then you need to buy from us a Controller Box (DTL-H2080) adapter.