Crystal LAN CS8920, Техническое справочное руководство, Страница: 41 / 67

AN84REV1 41
CS8920 Technical Reference Manual
Addr. Description Bit(s) Function
1Ch IA bits[39-32], bits[47-40] 15-0 IEEE individual node address
1Dh IA bits[ 23-16], bits[31-24] 15-0 IEEE individual node address
1Eh IA bits[ 7-0], bits[15-8] 15-0 IEEE individual node address
1Fh ISA Configuration Flags
Memory Mode Flag 15 0 = memory mode disabled, 1 = memory mode enabled
Boot PROM Flag 14 0 = no Boot PROM, 1= Boot PROM installed
StreamTransfer 13 0 = disabled, 1 = enabled
DMA Burst 12 0 = disabled, 1 = enabled
RxDMA Only 11 0 = disabled, 1 = enabled
Auto RxDMA 10 0 = disabled, 1 = enabled
DMA Buffer Size 9 0 = 16K, 1 = 64K
IOCHRDY Enable 8 0 = disabled, 1 = enabled
Use SA 7 0 = disabled, 1 = enabled
DMA Channel 6-4
5 = DRQ5, 6 = DRQ6, etc. (same as PP_374) **
IRQ 3-0 10 = IRQ10, 5 = IRQ5, etc. (same as PP_370) **
20h PacketPage Mem Base 15-4 12 MSBs of 24-bit address (lower 12 bits assumed = 0)
Reserved 3-0 Reserved for future use, set to 0
21h Boot PROM Base 15-4 12 MSBs of 24-bit address (lower 12 bits assumed = 0)
Reserved 3-0 Reserved for future use, set to 0
22h Boot PROM Mask 15-4 12 MSBs of 24-bit addr mask (lower 12 bits assumed = 0)
Reserved 3-0 Reserved for future use, set to 0
23h AutoNegCTL
Force FDX 15 0 = Do not force FDX, 1 = Force FDX
Reserved 14-10 Reserved for future use, set to 0
NLP Enable 9 0 = disabled, 1 = enabled
AutoNeg Enable 8 0 = disabled, 1 = enabled
Allow FDX 7 0 = disabled, 1 = enabled
Reserved 6-0 Reserved for future use, set to 0
24h Adapter Configuration
Ext. 10B-2 Cable Circuitry 15 0 = Not Present, 1 = Present
LoRx Squelch 14 0 = LoRx Squelch disabled, 1 = LoRx Squelch enabled
PolarityDis 13 0 = polarity correction enabled, 1= polarity correction disabled
Optimization Flags 12-11 00 = Server, 01 = DOS Client, 10 = Multi-OS Client