IBM 3745 Series, Справочник по техническому обслуживанию оборудования

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– One adapter module for 4 channel adapters
– Three console adapter modules providing three ports for:
- A local console
- A remote/alternate console
- An RSF modem
– One oscillator, and drivers/receivers (EIA V.28/RS-232-C).
Ÿ
On model 17A, a MOSS adapter card (MAC) containing:
– One adapter module for CCU bus
– One adapter module for 4 channel adapters
On 3745 Model 17A, a MOSS LAN adapter card (MLA) which links the MOSS
to the service processor through the LAN.
Ÿ A disk file adapter card to attach:
– One flexible disk drive (FDD),
– One hard disk drive (HDD).
Note: See pages YZ-031 for MOSS card and connector locations, and pages
YZ-331 for test points.
MOSS Reset
When a MOSS reset occurs, the led on the top of the MPC card is turned ON. The
panel displays code 001, a read MMIO bus is started by the MOSS code. If the
result is good, the led is turned OFF and the display code goes to 002. If the result
is not good after a two-second time out, the led starts blinking.
┌─────┐ ┌──────┐ POR ┌──────┐ Code ┌──────┐
│Panel├───5┤ PCC ├──────┬─────5┤ MPC ├────5─┤ MSC │
│ │ │ │ │ │ │ │ │
└─────┘ └──────┘ │ └──────┘ └──────┘
│ ┌──────┐
├─────5┤ MCC │
│ │ (1) │
│ └──────┘
│ ┌──────┐
├─────5┤ MAC │
│ │ (2) │
│ └──────┘
│ ┌──────┐
├─────5┤ MLA │
│ │ (2) │
│ └──────┘
│ ┌──────┐
└─────5┤ DFA │
│ │
└──────┘
(1) = On 3745 Models 1xð
(2) = On 3745 Model 17A
Figure 8-2. MOSS POR Flowchart
Ÿ MPC reset consists of terminating the operation in progress and initializing
internal registers. The reset sequence does not initialize main storage, or reg-
ister space. Those are initialized by storing into them with good parity. Several
specific control areas are also initialized by the IML program.
Ÿ A MOSS reset ONLY is performed with
Function = 1 (MOSS IML) at the control
panel.
Chapter 8. Maintenance and Operator Subsystem (MOSS)
8-5