Xref: utzoo comp.sys.ibm.pc:20144 comp.unix.xenix:3603
Path: utzoo!utgpu!water!watmath!clyde!ima!spdcc!dyer
From: dyer@spdcc.COM (Steve Dyer)
Newsgroups: comp.sys.ibm.pc,comp.unix.xenix
Subject: question on AT DMA
Message-ID: <2009@spdcc.COM>
Date: 11 Oct 88 06:24:01 GMT
Reply-To: dyer@spdcc.COM
Organization: S.P. Dyer Computer Consulting, Cambridge MA
Lines: 13

This might sound like an uninformed question, but I really am a bit
confused.  If I have a PC-type 8-bit DMA device plugged into an
AT bus (i.e., the extended 16-bit slot is unoccupied), does that limit
DMA transfers using this board to the first megabyte of physical memory?
Or does the coordination with the AT DMA channels handle that?  (I suspect
the latter.)

No lectures about using DMA on an AT, thanks...

-- 
Steve Dyer
dyer@harvard.harvard.edu
dyer@spdcc.COM aka {harvard,husc6,linus,ima,bbn,m2c,mipseast}!spdcc!dyer