Developing parser and scaner in Visual Basic

[snaider]

Parser and scaner

I want to make a compiler for a microprocessor I am doing in VHDL, a have the instruction set a I just want that the compiler take a txt file with the program , and give an another txt file with machine code. I think visual basic can make the interface part but it also can do the scaner part of the txt file and parser(do the grammar part) too.

 

[Zhasha]

Re: Parser and scaner

depends on the programming language
if youre making a C compiler, dont even start. the whole thing will be enormous
take a look at gcc source - huge

if youre doing ASM code, you could use visual basic for the convertion, and it should be relatively easy. you just need the datasheet for the target ic

 

[btbass]

Parser and scaner

What you need is lex and yacc. This is the normal way to do it. Bit of a learning curve though.

 

[throwaway18]

Parser and scaner

You might be able to use Table driven assembler. You just need to create a table of information about your processor.

Addition:
There are several other table driven assemblers that might be usfull
http://www.ticalc.org/archives/files/fileinfo/15/1504.html
http://home.comcast.net/~tasm/tasmman.htm
http://brej.org/chump/

 

[snaider]

Re: Parser and scaner

Those table driven assembler are a good idea. Exist any who work with a windowns interface , not just DOS.