參數(shù)資料
型號： HIF_SPEC
英文描述： EZ-030 Demonstration Board Theory of Operation Host Interface (HIF) Specification
中文描述： 易- 030演示板的經(jīng)營理論主機(jī)接口（誘導(dǎo)因子）規(guī)格
文件頁數(shù)： 104/118頁
文件大?。?/td> 356K
代理商： HIF_SPEC
Host Interface (HIF) Specification
A–3
Table A–2. Service Call Parameters
Parameter
027vers
Description
The version number of the installed Am29027 arithmetic
accelerator chip (if any).
A pointer to an allocated memory area, a
command-line-argument array, a pathname buffer, or a
NULL-terminated environment variable name string.
The base address of the command-line-argument vector
returned by the
getargs
service.
A pointer to the buffer area where data is to be read from or
written to during the execution of I/O services, or the buffer area
referenced by the
wait
service.
The capabilities request code passed to the
query
service.
Code values are: 0 (request HIF version), 1 (request CPU
version), 2 (request Am29027 arithmetic accelerator version), 3
(request CPU clock frequency), and 4 (request memory
environment).
The CPU clock frequency (in Hertz) returned by the
query
service.
The number of bytes actually read from file or written to a file.
The CPU family and version number returned by the
query
service.
The number of processor cycles (returned value).
The disable interrupts parameter to the
setim
service.
The daylight-savings-time-in-effect flag returned by the
gettz
service.
The error code returned by the service. These are usually the
same as the codes returned in the UNIX errno variable. See
Appendix B for a list of HIF error codes.
The exit code of the application program.
A pointer to a NULL-terminated ASCII string that contains the
directory path of a temporary filename.
The file descriptor that is a small integer number. File
descriptors 0, 1, and 2 are guaranteed to exist and correspond
to open files on program entry (0 refers to the UNIX equivalent
of stdin and is opened for input; 1 refers to the UNIX stdout and
is opened for output; 2 refers to the UNIX stderr and is opened
for output).
A pointer to the address of a spill or fill handler passed to the
setvec
service.
The version of the current HIF implementation returned by the
query
service.
The input/output status returned by the
iostat
service.
addrptr
baseaddr
buffptr
capcode
clkfreq
count
cpuvers
cycles
di
dstcode
errcode
exitcode
filename
fileno
funaddr
hifvers
iostat
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