The UP1000 is a motherboard built by Samsung and Alpha Processor, Inc. (API), later API NetWorks, and introduced in late 1999. ¹⁾

• 600 MHz EV67 with 2 MiB L2 cache or 700 MHz EV67 with 4 MiB L2 cache, L2 cache bandwidth 3.2 GiB/s ²⁾
• AMD-751 Chipset, ALi M1543C south bridge
• 3x 168-pin DIMMs, supports 64 MiB to 768 MiB of ECC unbuffered PC100 SDRAM
• 1x AGP 2x (see Known issues)
• 4x 33 MHz 32-bit PCI slots
• 2x ISA slots ³⁾
• 2x Ultra DMA33 IDE connectors, a floppy controller, 2x serial ports, a parallel port, PS/2 keyboard and mouse, and 2x USB ports, all provided by the M1543C ⁴⁾
• 2 MiB flash ROM
• ATX form factor, 12 in x 9.6 in (30.48 cm x 24.38 cm)

Initial shipments of the UP1000 came with AlphaBIOS only ⁵⁾, and Linux was booted from AlphaBIOS using APB, which needs kernels built with the legacy start address (see Kernel). API released SRM for the UP1000 in May 2000. ⁶⁾ There is no MILO for Nautilus systems. ⁷⁾

SRM is installed using the Alpha Diagnostic Environment (ADE), a firmware maintenance console unique to API boards that is invoked by a jumper. The SRM package contains three images (two ADE images and the SRM console) that are flashed over AlphaBIOS. To return to AlphaBIOS, the SRM console image is overwritten with nautilus.rom. ⁸⁾

The UP1000 and UP1100 SRM images are different revisions and cannot be used on each other's boards. ⁹⁾

The alphalinux/firmware repository keeps API's UP1000 firmware: up1000_srm_5.6_beta.zip, the May 2000 package that replaces AlphaBIOS with SRM console A5.6-4.1-9 and adds the fail-safe recovery modules, and nautilus.rom for AlphaBIOS. ¹⁰⁾ The package's instructions start ADE by setting jumper J43 (Recover Firmware); the manual's Reload ADE setting also moves J42 to 1-2 (see Firmware recovery). The instructions then load each of the three images from floppy and write it to flash with ADE's burn command. ¹¹⁾ Which SRM release was the last for the UP1000 is unclear; see Conflicting information.

Six jumpers (J42, J43, J44, J15, J16, and J37) select the firmware recovery modes. Each is a 3-pin header; by default all six have the shunt on pins 2 and 3 (pin 1 is nearest the board edge). ¹²⁾

J44, J15, J16, and J37 stay on pins 2 and 3. The shunts are returned to the default positions after the recovery. ¹³⁾ Jumpers J38, J41, J45, J50, and J51 and switch block SW4, which set the SROM format and the clocks, must be left at their factory settings. ¹⁴⁾

Current kernels support the UP1000 with CONFIG_ALPHA_NAUTILUS or a generic kernel; it boots from SRM with aboot. ¹⁵⁾ The onboard devices use these drivers:

• IDE (ALi M1543C): pata_ali ¹⁶⁾
• USB (the M1543C's M5237 OHCI controller): ohci-pci ^{17) 18)}
• System management: an ADM9240 on the M1543C's SMBus monitors the supply voltages and fan speeds, ¹⁹⁾ and is handled by the adm9240 driver, with i2c-ali15x3 for the SMBus. ^{20) 21)}

• The UP1000 has an LM75 temperature sensor. ²²⁾ A well cooled UP1000 has a heatsink temperature of about 45 to 50 C. ²³⁾

• The IDE controller's DMA engine cannot perform 48-bit LBA transfers on ALi revisions before C5, so the pata_ali driver uses PIO for accesses beyond the first 128 GiB of a disk. ²⁴⁾
• The AGP slot of the UP1000, UP1100, and UP1500 operates only as a PCI slot. Alpha is fully cache coherent and provides no non-cacheable mappings or software cache flushing, which the x86 AGP support in Linux depends on for native AGP transfers.
• The AMD-751 can address at most 768 MiB of memory. ²⁵⁾
• ATI Rage II and Rage Pro based video cards do not work in the UP1000 or UP1100, although they work in the UP2000 and DP264. ²⁶⁾
• The BIOS emulator in the UP1000 and UP1100 SRM firmware is older than the one in the UP1500's firmware. No AGP Radeon card has been made to work with it on a UP1100. ^{27) 28)}

Samsung developed the UP1x00 family of boards, while API took over development of the UP2000. ²⁹⁾

The following sources conflict with each other or with the account given above. They are listed here for further investigation.

• Latest SRM version
  • "Re: 2.40test10 working?", Rich Payne, axp-list, 17 Nov 2000: "The latest for the UP1000 is 5.6-4.1-9."
  • "Re: Ultra ATA 100 on UP1000", Rich Payne, axp-list, 26 Nov 2000: "5.6-12 should be the latest."