DPT是这样定义的结构:
DPT STRUC
rSrtHdUnld DB 1; Bits 0-3: SRT step rate time, bits 4-7: head unload time.
rDmaHdLd DB 1; Bit 0: 1=use DMA, bits 2-7: head load time.
bMotorOff DB 1; 55-ms increments before turning disk motor off.
bSectSize DB 1; Sector size (0=128, 1=256, 2=512, 3=1024).
bLastTrack DB 1; EOT (last sector on a track).
bGapLen DB 1; Gap length for read/write operations.
bDTL DB 1; DTL (Data Transfer Length) max transfer when length not set.
bGapFmt DB 1; Gap length for format operation.
bFillChar DB 1; Fill character for format (normally 0f6H).
bHdSettle DB 1; Head-settle time (in milliseconds).
bMotorOn DB 1; Motor-startup time (in 1/8th-second intervals)
DPT ENDS ; Size=11.
在MASM中组装时,我使用以下语法:
MOVB [DI-SIZEOF DPT]+[DPT.bHdSettle],15
MASM显示以下错误:
syntax error : [
答案 0 :(得分:2)
我不确定movb
应该是什么,但是我认为这是一个错字,而您的意思是mov
。
您可以编写如下指令:
mov (DPT PTR [DI-SIZEOF DPT]).bHdSettle,15
或者,如果您在PROC
内,想要通过di
进行多个结构访问,则可以告诉汇编器暂时假定di
指向{{1} }:
DPT