Chapter 4

An American Megatrends, Inc. (AMI) system BIOS with embedded setup and hard disk setup utilities resides in Flash ROM on the board. Access the BIOS setup by pressing the DELETE key during system boot.

The I/O board has eight LEDs arranged in two groups of four. As the system proceeds through its Power On System Test (POST), these LEDs display binary code which can be used to diagnose board failures. The post codes are available on the Cubix Customer Service web site.

CMOS Battery

The DP 6200 "D" utilizes an integrated internal battery within the processor and does not require an external battery to maintain CMOS memory.

All DP Series memory is provided in 168 pin, 72 bit standard 60ns buffered DIMMs. DIMMs do not need to be installed in pairs, and different sizes may be mixed on a SP. Table 4-1 shows the Memory map for the SP processor. Table 4-2 defines the boards I/O configuration.

Memory Range	Size	Use
00000-9FFFF	640KB	Conventional Memory
A0000-AFFFF	64KB	VGA Graphics Buffer
B0000-B7FFF	32KB	MDA Text Buffer
B8000-BFFFF	32KB	VGA/CGA Text Buffer
C0000-C7FFF	32KB	VGA Bios
C8000-DFFFF	96KB	Available
E0000-FFFFF	127KB	System & PCI BIOS

ISA Ports	Description
0000-00FF	Various "AT" functions in ISP chip and keyboard controller
01F0-01F7	IDE hard drive interface
02F8-02FF	COM2
03A0	Cubix supervisory interface
03A8-03AF	IES serial port
03B4-03B5	VGA
03BC-03BF	LPT1
03C0-03CF	VGA
03D4-03D5	VGA
03F0-03F7	Floppy / IDE
03F8-03FF	COM1

The 16 system hardware interrupts on the SP are represented in Table 4 - 4. Interrupts are managed by two standard 8259A Programmable Interrupt Controllers (PICs). Interrupts at IRQ 0 through 7 are located on the main PIC; IRQ 8 through 15 are on the SLAVE PIC.

IRQ	Description	IRQ	Description
0	Timer clock	8	Real Time Clock
1	Keyboard	9	Redirected IRQ 2
2	Second OIC controller	10	Set By PCI Plug & Play at boot time
3	COM2	11	Set By PCI Plug & Play at boot time
4	COM1	12	Available (or PS/2 Mouse)
5	Set By PCI Plug & Play at boot time	13	Math Coprocessor
6	Floppy Disk Controller	14	Primary IDE Controller
7	LPT1	15	Secondary IDE Controller (or IES)

The DP has a PS/2 compatible keyboard controller with the AMI keyboard BIOS. The keyboard controller uses IRQ 1 for its interrupts, and requires no DMA channel. The keyboard controller also supports a PS/2 compatible mouse which uses IRQ 12. Switch S1-3 is used to enable the PS/2 mouse interrupt on IRQ 12 (refer to Chapter 2 for switch settings).

The DP 6200 "D" Series includes a secondary IDE controller for the Density System CD-ROM Drive. If this controller is enabled in the BIOS, it will use IRQ 15. If using the IES Supervisory System, its Interrupt must then be set to IRQ 10.

The DP contains a PC/AT compatible floppy disk controller. It is configured for industry standard single-speed floppy disk drives, and supports up to two of any combination of 5.25 or 3.5 inch drives. The BIOS setup program must be configured for the proper drives. The floppy controller uses IRQ 6 for its interrupt and DRQ 2 for its DMA channel. The floppy disk controller can be disabled in the Peripheral Management Setup section of the BIOS CMOS setup program.

Two serial ports and a parallel port are available on the DP 6200. All three ports are brought out from the I/O board via a 40-pin ribbon cable that connects to a Cubix-supplied adapter board.