Hardware Description
SYS68K/CPU-30 R4 Technical Reference Manual
Page 108
(incorrectly) not driving its Bus Grant Out Level 3 (BG3OUT) on VME
to the high signal level as defined by the VME specification. In this case
the CPU-30 R4 will probe its Bus Grant In Level 3 at a low signal level
and conclude that slot-1 is detected. This is the incorrect conclusion for
the system setup which is actually there. For this situation, you can
disable the auto-detection by switch SW8-1.
NOTE: For proper operation, the jumper on the backplane connecting
BG3IN and BG3OUT must be removed for the CPU-30 R4 slot. This is
not necessary on active backplanes.
NOTE: For proper operation, the jumpers for BGIN and BGOUT on
lower (and higher) slots must be assembled on the backplane. This is not
necessary on active backplanes.
3.21.2 Slot-1 Status
Register
The status of the slot-1 detection may be read via the Slot-1 Status
Register at FF80.3980
16
. It is a read-only register.
CAUTION: Writing to the register is forbidden and may cause
malfunctions of the CPU-30 R4.
3.21.3 Enabling the
Arbiter
The arbiter of the FGA-002 will not automatically be set by hardware
when detecting slot-1 by switch setting or auto-detection. It must be
enabled by software if the board is system controller (e.g., FGA Boot
enables the arbiter automatically). For more information on the FGA-002
arbiter, please see the FGA-002 User’s Manual.
SW8-1
Description
OFF (default)
Auto detection enabled,
slot 1 detected as a function of probing BG3IN on VME
ON
Auto detection disabled,
slot-1 not detected
Register
Access
Description
Slot-1 Status
R
Bit 0:
1 slot-1 detected
0 slot-1 not detected
Bit 1-7: undefined
W
Forbidden
i
i
Содержание SYS68K/CPU-30 R4
Страница 41: ...Installation SYS68K CPU 30 R4 Technical Reference Manual Page 28...
Страница 127: ...Hardware Description SYS68K CPU 30 R4 Technical Reference Manual Page 114...
Страница 130: ...SYS68K CPU 30 R4 Technical Reference Manual Set of Data Sheets Page 117 4 2 1 RTC 72421...
Страница 131: ...Set of Data Sheets SYS68K CPU 30 R4 Technical Reference Manual Page 118 4 2 2 DUSCC 68562...
Страница 132: ...SYS68K CPU 30 R4 Technical Reference Manual Set of Data Sheets Page 119 4 2 3 PI T TS68230...
Страница 133: ...Set of Data Sheets SYS68K CPU 30 R4 Technical Reference Manual Page 120 4 2 4 SCSI 87033 34...
Страница 134: ...SYS68K CPU 30 R4 Technical Reference Manual Set of Data Sheets Page 121 4 2 5 FDC37C65C...
Страница 135: ...Set of Data Sheets SYS68K CPU 30 R4 Technical Reference Manual Page 122 4 2 6 LANCE Am79C90...
Страница 136: ...SYS68K CPU 30 R4 Technical Reference Manual Set of Data Sheets Page 123 4 2 7 SIA Am7992B...
Страница 137: ...Set of Data Sheets SYS68K CPU 30 R4 Technical Reference Manual Page 124 4 2 8 Motorola MC68030 and MC68882...
Страница 145: ...VMEPROM SYS68K CPU 30 R4 Technical Reference Manual Page 132...
Страница 189: ...Appendix to VMEPROM SYS68K CPU 30 R4 Technical Reference Manual Page 176...