The floppy drive, like the Macintosh's, is unusual in that it has an electromechanical eject mechanism rather than the conventional eject button, and therefore must be ejected by the operating system or OpenBoot. The machine can connect to any SCSI CD drive, via either the SCSI connector on the back or by connecting it to any spare internal SCSI connector via a 50-pin cable. Network support The SPARCstation 1 comes with an on-board AMD Lance Ethernet chipset and a 15-pin AUI connector, which can connect to 10BASE2, 10BASE5 or 10BASE-T via an appropriate transceiver. The OpenBoot ROM is able to boot from network, using RARP and TFTP. Like all other SPARCstation systems, the SPARCstation 1 holds system information such as MAC address and host id (serial number) in NVRAM. If the battery on this chip dies, then the system will not be able to boot. NVRAM The SPARCstation 1 uses an M48T02 battery-backed RTC with RAM chip which handles the real time clock and boot parameter storage. A problem with this chip is that the battery is internal, which means the entire chip must be replaced when its battery runs out. As all SPARCstation 1s made are now older than the battery life of this chip, a substantial number of these systems now refuse to boot. Additionally, the SPARCstation 1 design used the reserved bits in the M48T02's NVRAM in a non-standard way; since later revisions of the M48T02 chip exert stricter control over these bits, a current M48T02 will store the NVRAM data, but the RTC will not function correctly and the system may fail to auto-boot. Due to incompatibilities with modern M48T02s, it is common to modify failed NVRAMs by cutting into the encapsulation and patching in a new battery. It is also possible to replace the entire encapsulation, which also contains a 32.768 KHz clock crystal. Operating systems The SPARCstation 1, 1+, IPC and SLC can run the following operating systems: SunOS 4.0.3c through 5.7 (Solaris 7) Linux (Modern versions may have trouble with the limited amount of memory in these machines) NetBSD 1.0 onwards OpenBSD - All versions up to 5.9 (OpenBSD 5.9 was the last release to support SPARC32) Notable uses Four or five SPARCstation 1 units were used by Game Freak to develop Pokémon Red and Green. Related computers The SPARCstation 1+ (Sun 4/65) pushed the CPU to a 25 MHz LSI L64801, upgraded