===== EB64 =====

<WRAP box right 340px>
^ EB64 ^^
^ CPU | [[wp>Alpha_21064|21064]] (EV4), 150 MHz |
^ Memory | 4 SIMM slots, parity FPM DRAM, up to 64 MiB |
^ Buses | ISA |
^ Onboard I/O | Am79C960 Ethernet, floppy, 2 serial, keyboard, mouse |
^ Firmware | Debug monitor, SRM |
^ Linux | Removed in 1995 |
</WRAP>

The DECchip 21064 Evaluation Board (EB64) is an evaluation board released in 1993.

==== Specifications ====

  * DECchip 21064 CPU at 150 MHz [(>{{wiki:hardware:motherboards:eb64:eb64_user_guide.pdf?linkonly|DECchip 21064 Evaluation Board User's Guide}})]
  * 512 KiB external backup cache (Bcache) of 12 ns SRAMs, configurable to 256 or 128 KiB
  * 4x 36-bit DRAM SIMMs, supports 4 MiB to 64 MiB with parity, 128-bit data path
  * 2x ISA slots, driven by a VLSI Technology SC486 (VL82C486 and VL82C113A) ISA bus controller, which also provides the interrupt controller, DMA controller, timers, real-time clock, and keyboard and mouse interfaces
  * SMC FDC37C651 Super I/O controller providing 2 serial ports and a floppy disk controller
  * AMD Am79C960 PCnet-ISA Ethernet with 10BaseT and 10Base2 interfaces
  * Serial ROM (SROM) for CPU initialization
  * 2x PROM sockets: a 512 KiB or 1 MiB debug ROM containing the debug monitor, and one user-programmable
  * High-speed 21064 pin-bus expansion interface

==== Firmware ====

DEC made SRM consoles available for its evaluation boards, including the EB64, as part of its evaluation board software development kit. [(>[[https://github.com/alphalinux/mailing-list-archives/blob/main/axp-list-mbox/1998-January.mbox#L3642|"Re: SRM license issues"]], Jay Estabrook, axp-list, 6 Jan 1998)] [(>[[https://github.com/alphalinux/mailing-list-archives/blob/main/axp-list-mbox/1997-October.mbox#L21485|"Re: Milo booting other OSes?"]], Jay Estabrook, axp-list, 29 Oct 1997)]

==== Linux ====

Linux has not supported the EB64 since November 1995, when support was removed at DEC's request because the board was out of production and had never sold in volume. [(>[[https://github.com/alphalinux/mailing-list-archives/blob/main/axp-list-mbox/1995-November.mbox#L188|"RE: test"]], David Rusling, axp-list, 23 Nov 1995)] [(>[[https://github.com/alphalinux/mailing-list-archives/blob/main/axp-list-mbox/1995-November.mbox#L308|"Re: test"]], David Mosberger-Tang, axp-list, 26 Nov 1995)]

The EB64 should not be confused with the PCI-based [[hardware:motherboards:eb64plus|EB64+]] or [[hardware:motherboards:pc64|AlphaPC 64]]; some mailing list posts use "EB64" to refer to one of those boards.

==== Documentation ====

^ Document ^ Part number ^ Date ^
| {{wiki:hardware:motherboards:eb64:eb64_user_guide.pdf?linkonly|DECchip 21064 Evaluation Board User's Guide}} | EC-N0351-72 | September 1993 |

{{tag>hardware motherboard 21064 digital}}