1-8 Technical InformationTable Section 1-5 I/O Address MapAddress (Hex) I/O Device Name0376 Secondary IDE channel command port0377 Secondary IDE channel status port0378-037F Parallel port 103BC-03BF Parallel port 203C0-03CF Video Graphics Array (VGA) compare registers03E8-03EF Serial port 303F0-03F5 Diskette channel 103F6 Primary IDE channel command port03F7 (write) Diskette channel command port03F7, bit 7 Diskette change channel 103F7, bits 6:0 Primary IDE channel status port03F8-03FF Asynchronous communications port 10CF8 PCI Configuration Space Enable0CF9 Deturbo Mode EnableC000-C0FF 82434LX configuration registersC200-C2FF 82378IB configuration registersC300-C3FF Cirrus Video configuration registersSystem MemoryThe system comes standard with 8-MB of memory. System memory can be expanded up to80 MB for the desktop system and up 136 MB for the minitower system. Memory expan-sion is performed using single in-line memory modules (SIMMs) installed in SIMM sockets.The standard 8 MB of memory is soldered on the system board. The first megabyte includesthe standard 640 KB of base memory. The remaining memory is extended memory. FourSIMM sockets are integrated on the system board.The SIMM memory sockets accept 1-, 2-, 4-, 8-, 16-, or 32-MB SIMM sticks. High-speedRAM is 32 bits wide with four parity bits. SIMMs are 256 K x 36 bit (1 MB), 512 K x 36bit (2 MB), 1 M x 36 bit (4 MB), 4 M x 36 bit (16 MB), and 8 M x 36 bit (32 MB). Thereare no switches or jumpers to set when SIMMs are added.
