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AmigaOS 4.0 - About OS4 - Preferences

UBOOT - Hardware Preferences Editor

The U-Boot Prefs "Hardware Menu" is accessed from the second tab and gives access to all of the hardware related parameters. Other parameters can be accessed by clicking on the other tabs at the top of the display, namely Boot, IDE Ports, or OS4 Specific.

AmigaOS U-Boot Preferences Menu

Serial ports addresses and default speed
Options available are:
  • First - equivalent to serial1_address in UBoot Environment Variables and specifies the hardware address where Serial port 1 will be located. The options are 0x2E8, 0x2F8, 0x3E8 and 0x3F8. Normally set to 0x3F8.
  • Second - equivalent to serial2_address in UBoot Environment Variables and specifies the hardware address where Serial port 2 will be located. The options are 0x2E8, 0x2F8, 0x3E8 and 0x3F8. Normally set to 0x2F8.
  • Speed - equivalent to baudrate in UBoot Environment Variables and specifies the baud rate for the serial ports. The options are 9600, 19200, 38400, 57600, 115200, 230400, 460800, and 921600. Default is 9600.
Parallel port
Options available are:
  • Mode - equivalent to parallel_mode in UBoot Environment Variables and specifies the parallel port mode. The options are Off, Unidirectional, ECP and EPP. Normally set to EPP.
  • Address - equivalent to parallel_address in UBoot Environment Variables and specifies the hardware address where the Parallel port will be located. The options are 0x278, and 0x378. Normally set to 0x378.
USB ports
Options available are:
  • Enable port 0 and 1 (rear) - equivalent to usb0_enable in UBoot Environment Variables and specifies whether the USB ports on the rear of the computer are to be enabled. Normally ticked.
  • Enable port 2 and 3 (front) - equivalent to usb1_enable in UBoot Environment Variables and specifies whether the USB ports on the front of the computer are to be enabled. Normally unticked.
AGP Configuration
Options available are:
  • Enable AGP - equivalent to agp_enable in UBoot Environment Variables and specifies whether the AGP port is to be enabled. Normally ticked.
  • Enable Sideband - equivalent to agp_sideband in UBoot Environment Variables and specifies whether AGP Sideband is to be enabled. Normally unticked.
  • AGP Speed - equivalent to agp_speed in UBoot Environment Variables and specifies the speed of the AGP port if enabled. Normally 2x.
UBoot input and output devices
Options available are:
  • Default input - equivalent to stdin in UBoot Environment Variables and specifies standard input device, and can be either PS2 Keyboard, Serial Port or Catweasel. Normally PS2 Keyboard.
  • Default output - equivalent to stdout in UBoot Environment Variables and specifies the standard output device, and can be either the Screen (VGA card) or Serial port. Normally Screen (VGA card).
PCI Interrupts
The are four PCI Interrupts that must be configured, labelled A, B, C and D.

Options available for Interrupt A are:

  • IRQ Number - equivalent to pci_irqa in UBoot Environment Variables and specifies the IRQ number for the Interrupt. Options are IRQ7, IRQ9, IRQ10, IRQ11, IRQ13, or Auto. Normally IRQ9.
  • Triggered by - equivalent to pci_irqa_select in UBoot Environment Variables and specifies how the Interrupt is triggered. Options are LEVEL or EDGE. Normally LEVEL.
Options available for Interrupt B are:
  • IRQ Number - equivalent to pci_irqb in UBoot Environment Variables and specifies the IRQ number for the Interrupt. Options are IRQ7, IRQ9, IRQ10, IRQ11, IRQ13, or Auto. Normally IRQ10.
  • Triggered by - equivalent to pci_irqb_select in UBoot Environment Variables and specifies how the Interrupt is triggered. Options are LEVEL or EDGE. Normally LEVEL.
Options available for Interrupt C are:
  • IRQ Number - equivalent to pci_irqc in UBoot Environment Variables and specifies the IRQ number for the Interrupt. Options are IRQ7, IRQ9, IRQ10, IRQ11, IRQ13, or Auto. Normally IRQ11.
  • Triggered by - equivalent to pci_irqc_select in UBoot Environment Variables and specifies how the Interrupt is triggered. Options are LEVEL or EDGE. Normally LEVEL.
Options available for Interrupt D are:
  • IRQ Number - equivalent to pci_irqd in UBoot Environment Variables and specifies the IRQ number for the Interrupt. Options are IRQ7, IRQ9, IRQ10, IRQ11, IRQ13, or Auto. Normally IRQ7.
  • Triggered by - equivalent to pci_irqd_select in UBoot Environment Variables and specifies how the Interrupt is triggered. Options are LEVEL or EDGE. Normally LEVEL.
Memory
Options available are:
  • Currently installed, MBytes - displayed for information only and cannot be changed.
  • Limit memory size reported to OS - equivalent to use_memory_limit in UBoot Environment Variables and specifies whether the USB ports on the front of the computer are to be enabled. Normally unticked.
  • Limit, MBytes - equivalent to limit_memory in UBoot Environment Variables and specifies whether the USB ports on the rear of the computer are to be enabled. Normally ticked.
Action Buttons
When you make changes you can choose to 'Save' them permanently, 'Revert' to the previously saved values, or you can 'Cancel' and lose all changes. (The Revert option does not appear to be working properly at this time.)

Disclaimer: Amiga Auckland have prepared the above information for the use of its members based on our experiences and as such is subject to revision at any time. Amiga Auckland cannot guarantee any of the information and cannot be held accountable for any issues that may result from using it.


Copyright 2006 Amiga Auckland Inc. All rights reserved.
Revised: February 9, 2006.