2
PCM-586 Technical Reference
2.1
Introduction
This sec tion of the man ual is in tended to pro vide suf fi cient in for ma tion re gard ing the
con figu ra tion and us age of the PCM- 586 board. Win Sys tems main tains a Tech ni cal
Sup port Group to help an swer ques tions re gard ing con figu ra tion, us age, or pro gram ming
of the board. For an swers to ques tions not ade quately ad dressed in this man ual, con tact
Tech ni cal Sup port at (817) 274- 7553 be tween 8AM and 5PM Cen tral Time.
2.2
ACC MICRO 2089 Chipset
The PCM- 586 util izes the ACC Mi cro 2089 Chipset which pro vides a highly
in te grated, high- performance back bone for full PC/AT com pati bil ity. The 2089 con tains
the logic for DRAM, CPU and Bus State con trol as well as the stan dard com ple ment of
‘AT’ class pe riph er als in ter nally, in clud ing :
8 DMA Chan nels com pati ble with PC- AT Con trol lers
15 In ter rupt in puts com pati ble with mas ter/slaved 8259 in ter rupt con trol lers
Three 8254 com pati ble timer/coun ter chan nels
Two 8250 com pati ble UARTS
EPP/ECP LPT Port
765B com pati ble Floppy Disk Controller
PC-AT com pati ble real time clock/cal en dar with CMOS
The func tional units are 100% PC- AT com pati ble and are sup ported by the Award
BIOS and Setup. Us ers de sir ing to ac cess these in ter nal pe riph er als di rectly should ref er
to any manu fac tur er’s ge neric lit era ture on the equiva lent dis crete com po nent.
There are a number of in ter nal reg is ters within the 2089 Chipset sec tion that are used
by the BIOS for con trol and con figu ra tion. Ref er to the I/O Map in Ap pen dix A for port
us age to avoid con flicts when add ing ex ter nal I/O de vices.
021402
OPERATIONS MANUAL PCM-586
Page 2-1
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