The AlphaServer 1000 is a single-processor PCI/EISA server that Digital sold from November 1994, first with 21064 and 21064A CPUs (4/xxx models) and later with 21164 and 21164A CPUs (5/xxx models). ^{1) 2)}

The CPU is on a daughtercard, so the same enclosure was sold with 21064 and 21064A CPUs as the 4/200, 4/233 ³⁾, and 4/266 models ⁴⁾ and later with 21164 and 21164A CPUs as the 5/xxx models. The 5/xxx models are Mikasa-Primo, also called Mikasa-Pinnacle, and use CIA core logic rather than the APECS of the 4/xxx models. ^{5) 6)}

Except where noted, the following describes the 4/266 model. ⁷⁾

• 266 MHz 21064A on an upgradable CPU daughtercard, with 8 KiB of serial ROM for power-up code
• 2 MiB of direct-mapped, ECC protected level 2 cache on the daughtercard
• 21071/21072 (APECS) core logic on EV4 models, 21171 (CIA) on the EV5 models
• 128-bit ECC protected memory bus
• 20 SIMM sockets in four banks of five (four data plus one for ECC), taking 16, 32, 64, 128, and 256 MiB modules, 16 MiB to 1 GiB total; all modules in a bank must be the same capacity, and bank 0 must be populated. Banks of different sizes can be mixed, with the larger SIMMs in bank 0 ⁸⁾, and third-party ECC SIMMs work in sets of five ⁹⁾
• Three 33 MHz PCI slots ¹⁰⁾
• Eight 8.33 MHz EISA/ISA slots, all bus master capable ¹¹⁾
• Onboard Cirrus SVGA controller ¹²⁾, reported to be a Cirrus 5424 ¹³⁾
• Onboard NCR 53C810 Fast SCSI-2 controller with an external connector ¹⁴⁾
• PCI-to-EISA bridge, Xbus for the real-time clock, NVRAM, FlashROM, and operator control panel
• 1 MiB of FlashROM for firmware and diagnostics, 8 KiB of NVRAM for configuration
• Bidirectional parallel port, two serial ports, floppy disk controller, keyboard and mouse interface, PC-style speaker
• Wide-ready dual SCSI backplane and one internal BA350 StorageWorks shelf for up to seven 3.5-inch devices, plus 3.5-inch floppy, 5.25-inch CD-ROM, and an optional 5.25-inch tape bay
• Optional redundant power supply
• The onboard Cirrus VGA can be disabled by a jumper at the top left of the motherboard, not on the CPU daughtercard, and through the EISA Configuration Utility, in order to use another card. ^{15) 16)}

Use the final SRM version, V5.4-104 on the 5/xxx models (see final SRM versions and Updating firmware).

Current kernels support only the Mikasa-Primo models with EV56 (21164A) CPUs (CONFIG_ALPHA_MIKASA, or a generic kernel), which boot from SRM with aboot. The AlphaServer 1000 accepts EV56 CPU daughtercards, and the AlphaServer 1000A uses the same daughtercards; ¹⁷⁾ the 5/333 and 5/400 models of both have a 21164A. ¹⁸⁾ Linux 6.9 was the last version to support the 4/xxx models and the 5/300, which has a 300 MHz EV5 (21164); Linux 6.10 removed support for processors older than the EV56 (21164A), along with the EV4 machine vector mikasa_mv. ^{19) 20) 21)}

• Boot the Mikasa from the SRM console. ²²⁾
• The AlphaServer 1000 and 1000A (Noritake) deliver interrupts quite differently, so a kernel built for one platform does not run on the other. ²³⁾
• The onboard NCR 53C810 SCSI controller uses the sym53c8xx driver. ²⁴⁾ The cirrusfb framebuffer driver supports Zorro boards and PCI Cirrus chips from the GD5430 on, not the onboard GD5424. ^{25) 26)}
• For a serial console, see Using SRM.

• Weight: the pedestal system weighs 36 kg (80 lb) without disks and with one power supply, and up to 42 kg (93 lb) fully configured with two power supplies. ²⁷⁾

The 4/200 arrived in November 1994. ²⁸⁾ Rackmount (RM) and cabinet (CAB) versions were announced at the same time, with the same CPU, memory, power supply, and I/O as the pedestal system but a different chassis with two PCI slots, seven EISA bus master slots, and one interleaved PCI/EISA slot. ²⁹⁾ The 4/233 was announced on 24 April 1995. ³⁰⁾ The 4/266 in turn replaced the 4/233 and raised the memory ceiling to 1 GiB. ³¹⁾