sam/uVM
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Implemented vm memory using external 23LCV512 chip.

Browse Source 
Todo: implement extended registers
This commit is contained in:
Sam Stevens
2018-10-24 21:59:51 +01:00
parent 600be14336
commit 52a70e7931
6 changed files with 237 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
arduino/vm.c
View File

@@ -36,7 +36,6 @@ void vm_reset(VM *vm) {
void vm_clear(VM *vm) {
vm_reset(vm);
memset(&vm->M, 0, VM_MEM_SIZE);
}
inline uint8_t vm_get_r(VM *vm, uint8_t r) {
@@ -99,7 +98,7 @@ void vm_step(VM *vm) {
vm->halted = true;
return;
}
uint16_t raw = (vm->M[PC] << 8) + vm->M[PC + 1];
uint16_t raw = (vm->readAddr(PC) << 8) + vm->readAddr(PC + 1);
vm->PC += 2;
inst.op = (uint8_t) (raw >> 12);
@@ -118,7 +117,7 @@ void vm_step(VM *vm) {
temp16 = x;
temp16 += inst.imm;
if (temp16 < VM_MEM_SIZE) {
d = vm->M[temp16];
d = vm->readAddr(temp16);
} else {
if (vm->error != NULL) {
vm->error(VM_ERR_OUT_OF_BOUNDS);
@@ -132,7 +131,7 @@ void vm_step(VM *vm) {
temp16 = vm_get_r(vm, inst.rd);
temp16 += inst.imm;
if (temp16 < VM_MEM_SIZE) {
vm->M[temp16] = x;
vm->writeAddr(temp16, x);
} else {
if (vm->error != NULL) {
vm->error(VM_ERR_OUT_OF_BOUNDS);