Motorola MVME2600 Base Module Feature Register, Z8536 CIO Device, SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0

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Functional Description

Z8536 CIO Device

The Z8536 CIO device complements the Z85230 ESCC by supplying modem control lines not provided by the Z85230 ESCC. In addition, the Z8536 CIO device has three independent 16-bit counters/ timers. The Z85230 receives a 5 MHz clock input.

Base Module Feature Register

The Base Module Feature Register contains the details of the MVME2603/2604 single board computer’s configuration. It is an 8-bit read-only register located on the base board at ISA I/O address $0802.

Base Module Feature Register — Offset $0802

BIT	SD7	SD6	SD5	SD4	SD3	SD2	SD1	SD0
FIELD	Not Used	SCCP∗	PMC2P∗	PMC1P∗	VMEP∗	Not Used	LANP∗	SCSIP∗
OPER		R	R	R	R		R	R
RESET		N/A	1	N/A	N/A		N/A	N/A

SCCP∗ Z85230 ESCC present. If set, there is no on-board synchronous serial support (the ESCC is not present). If cleared, the Z85230 ESCC is installed and there is on-board support for synchronous serial communication.

PMC2P∗ PMC/PMCIX slot 2 present. If set, no PCI mezzanine card (or PCI expansion device) is installed in PMC slot 2. If cleared, PMC/PMCIX slot 2 contains a PCI mezzanine card (or PCI expansion device).

PMC1P∗ PMC slot 1 present. If set, no PCI mezzanine card is installed in PMC slot 1. If cleared, PMC slot 1 contains a PCI mezzanine card.

VMEP∗ VMEbus present. If set, there is no VMEbus interface. If

cleared, the VMEbus interface is supported.

LANP∗ Ethernet present. If set, no Ethernet transceiver interface is installed. If cleared, there is on-board Ethernet support.

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