Motorola MVME187 Board

The MVME187, a single-board computer (SBC), was the first system from Motorola to implement a 88000 CPU, in this case the 88100. It is, besides the actual MPU, almost identical to its m68k-based cousin MVME167; both can use the same peripheral and RAM boards. The MVME187 itself is a single-height 6U VME board. Memory has to be placed directly on this board via so called mezzanine boards, which were available in two different types and several configurations:

1. Parity protected RAM, sizes include {4, 8, 16, 32}MB.
2. ECC protected RAM, sizes include {4, 8, 16, 32, 64, 128}MB.

These boards can be mixed when using Motorola System V/88 Unix. Up two two boards can be placed on the SBC; just one mezzanine board and the SBC take up one VME slot. Two mezzanine boards and the SBC take the space of two VME slots.
The external I/O was implemented via the P2-VME connector at the back of the board. Several breakouts were available, Motorola's MVME712 boards were the most widely used ones.

CPU

• 88100 at 25MHz or 33MHz
• two 88200 or 88204 CMMUs

Cache

• 16KB/16KB or 64KB/64KB I/D off-chip L1

Chipset

• Intel i82596CA 10Mb Ethernet
• NCR 53C710 Fast-narrow SE SCSI controller
• 8-bit bidirectional parallel interface
• four serial channels
• 128KB static RAM
• PCCchip2 ASIC (provides interface to aforementioned I/O-chips)
• four 44-pin sockets for up to 4MB on-board ROM/EPROM.

Memory

• Proprietary daughter boards (mezzanine)
• Up to 64MB using two parity modules and up to 256MB using two ECC modules.

VME

• VMEchip2 ASIC provides VME interface
• The VME-I/O is implemented via the P1 connector

Misc

• 8 Status LEDs (FAIL, STAT, RUN, SCON, LAN, 12V, SCSI, VME)
• 2 switches (RESET and ABORT).

Operating Systems

• OpenBSD/mvme88k
• Motorola System V/88 Unix R3.2 V3
• Motorola System V/88 Unix R4.0 V3
• Motorola System V/88 Unix R4.0 V4

References

• MVME187 Installation Guide (PDF)

Available MVME187 models

model	CPU clock	RAM	cache
MVME187-001B	25MHz	4MB parity	32KB
MVME187-002B	25MHz	8MB parity	32KB
MVME187-003B	25MHz	16MB parity	32KB
MVME187-004B	25MHz	32MB parity	32KB
MVME187-023B	33MHz	16MB ECC	128KB
MVME187-024B	33MHz	32MB ECC	128KB
MVME187-031B	33MHz	4MB ECC	32KB
MVME187-032B	33MHz	8MB ECC	32KB
MVME187-033B	33MHz	16MB ECC	32KB
MVME187-034B	33MHz	32MB ECC	32KB
MVME187-035B	33MHz	64MB ECC	32KB
MVME187-036B	33MHz	128MB ECC	32KB

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