System 6-12
•
Synchronous ISA bus clock,
•
Programmable command delay and I/O recovery time,
•
One level of post write buffer,
•
Flash EPROM and combined BIOS support,
•
ISA Bus (P996 standard compliant),
•
High-drive buffers to support up to 20 slots,
•
Integrates the functionality of two 8237 DMA Controllers (see Table 6-2), two
8259 Interrupt Controllers (see Table 6-3) and one 8254 Counter/Timer,
•
A steering logic feature insures that the slower ISA bus traffic does not block the
PCI bus traffic.
TABLE 6-2:
8237 DMA Controllers
DMA 0
Available
DMA 1
PnP available (ECP)
DMA 2
Floppy controller
DMA 3
PnP available (ECP or Ethernet)
DMA 4
Cascade controller # 1
DMA 5
PnP available (Ethernet)
DMA 6
PnP available (Ethernet)
DMA 7
PnP available (Ethernet)
According to Plug and Play standards, the System BIOS automatically allocates DMA
Channel 1 or 3 for the parallel port's ECP mode. Channel 2 is reserved for the Floppy
controller and Channel 4 is used to cascade Channels 0 through 7 to the
microprocessor. The DMA Channel for the Plug and Play Ethernet device is
automatically allocated by the System BIOS among those available (Channel 3, 5, 6 or
7).
Содержание PCI-993
Страница 31: ...Jumper Locations Configuration 2 7...
Страница 32: ...Jumper Locations Configuration 2 8 TABLE 2 1c Jumper Settings W13 W18 W22...
Страница 33: ...Jumper Locations Configuration 2 9 TABLE 2 1d Jumper Settings W24 W27 J14...
Страница 36: ...Connector Locations Pin Out 4 3 DIAGRAM 4 1 Connector Locations...
Страница 56: ...System 6 3 DIAGRAM 6 1 System Components Location Bottom of Board...
Страница 57: ...System 6 5 DIAGRAM 6 2 System Components Location Top of Board...
Страница 117: ...Video 13 2 DIAGRAM 13 1 Video Components Location Top of Board DIAGRAM 13 2 Video Components Location Bottom of Board...
Страница 127: ...PART THREE SOFTWARE REFERENCE 15 AMIBIOS SETUP 16 VIP UP SETUP 17 UPDATING BIOS WITH UBIOS 18 VT100 MODE...
Страница 172: ...VT100 Mode 18 3 DIAGRAM 18 1 VT100 Full Setup DIAGRAM 18 2 VT100 Partial Setup...
Страница 188: ...TEK933 Board Diagrams C 3 DIAGRAM C 1 TEK933 Assembly Top...
Страница 189: ...TEK933 Board Diagrams C 5 DIAGRAM C 2 TEK933 Assembly Bottom...
Страница 190: ...TEK933 Board Diagrams C 7 DIAGRAM C 3 TEK933 Configuration...
Страница 191: ...TEK933 Board Diagrams C 9 DIAGRAM C 4 TEK933 Mechanical Specifications...
Страница 197: ...Post Codes Error Codes E 2 to main BIOS in shadow RAM...