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emulator
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Add a print routine for the CPU architecture.

This commit is contained in:
lux 2018-02-04 02:30:21 +01:00
parent 6ef4c5aa76
commit 8b4e03b96e
3 changed files with 54 additions and 0 deletions
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3
src/main.c
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@ -28,6 +28,9 @@ int main(int argc, char *argv[])
if(initialise_ram(ram,argc,argv)==-1) return 1; /*load data from command line into RAM
(-1 in case of error,
else number of correctly read words)*/
print_architecture(); //print cpu architecture at startup
while(run)
{
ir = ram[pc]; //get instruction from RAM

41
src/toy.c
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@ -41,6 +41,40 @@ void print_instructionSet(void)
"\tmichael.krause@uni-leipzig.de\n");
}
void print_architecture(void)
{
printf(
" +---------------+ +--------+\n"
" | | v |\n"
" +------------v------------+ | +--+-----+ |\n"
" | INSTRUCTION REGISTER(IR)| | |ACCU | |\n"
" +-------------------------+ | |(16 BIT)| |\n"
" ||OP-CODE || ADDRESS || | +--+-----+ |\n"
" ||(4 BIT) || (12 BIT) || | | |\n"
" |----+-----------+--------| | | |\n"
" +--- | --------- | -------+ +------| | |\n"
" | | | v v |\n"
" +--------+ +--------+ | +-+--+ +--+-+ |\n"
" | | | | | +----+ | |\n"
" v | v | | ALU | |\n"
"+-----+-------+ | +----+--------+ | ++ (16 BIT) +-+ |\n"
"| | | | PC | | ++ ++ |\n"
"|CONTROL LOGIC| | | 12 BIT | | +-------+-+ |\n"
"| | | | | | | |\n"
"+-------------+ | +-+-----------+ | +-----------+\n"
" | | | v\n"
" v v | +------------+----------+\n"
" +-++ ++-+ | | DATA IN |\n"
" | +---+ | +-+ DATA OUT |\n"
" | MUX | | +-------------------+ |\n"
" ++ 12 BIT++ | |4k WORDS OF 16 BITS| |\n"
" +---+---+ | +-------------------+ |\n"
" | | |\n"
" +------------------ > ADDR |\n"
" +-----------------------+\n"
"\n");
}
void print_instruction(uint8_t opcode)
{
opcode%=16;
@ -94,6 +128,13 @@ int initialise_ram(uint16_t *ram, int argc, char **argv )
return -1;
}
if(strcmp(argv[1],"-i")==0)
{
printf("interpretation terminated.\n\n");
print_architecture();
return -1;
}
if(NULL==(fp=fopen(argv[1],"r")))
{
fprintf(stderr,"%s","open input stream error !\n");

10
src/toy.h
View File

@ -17,6 +17,16 @@ extern const uint16_t * const ACCU; //read only access to accu
void print_instructionSet(void);
/**
* print_instructionSet(): prints the cpu architecture.
* This is a user help function and can be activated via
* the -i parameter.
* Return: none
*/
void print_architecture(void);
/**
* print_instruction(): converts a OP-Code into a human word.
* Return: none