[comp.sys.ibm.pc] Q: What is MB/sec AT bus speed?

cliffhanger@cup.portal.com (Cliff C Heyer) (09/10/89)

I know the AT bus is rated at
8MHz...but what is the aggregate
throughput? (MBytes/sec)

Are 8 bits or 16 bits transferred 
in parallel? (Or worse yet - are
they transferred serially?)
Is I/O done byte-by-byte or in
blocks?

Please POST your
answers. Thanks in advance.