minor fixes

src/main.c

@@ -215,6 +215,25 @@ nn_Exit ne_fsState_handler(nn_FilesystemRequest *req) {
 		}
 		fwrite(req->strarg1, sizeof(char), req->strarg1len, f);
 		return NN_OK;
+	case NN_FS_SEEK:
+		if(req->fd < 0 || req->fd >= NN_MAX_OPENFILES) {
+			nn_setError(C, "bad file descriptor");
+			return NN_EBADCALL;
+		}
+		f = state->files[req->fd];
+		if(f == NULL) {
+			nn_setError(C, "bad file descriptor");
+			return NN_EBADCALL;
+		}
+		int whence = SEEK_SET;
+		if(req->whence == NN_SEEK_CUR) {
+			whence = SEEK_CUR;
+		} else if(req->whence == NN_SEEK_END) {
+			whence = SEEK_END;
+		}
+		fseek(f, req->off, whence);
+		req->off = ftell(f);
+		return NN_OK;
 	case NN_FS_OPENDIR:
 		ne_fsState_truepath(state, truepath, req->strarg1);
 		state->dir = ne_opendir(truepath);

src/neonucleus.c

@@ -3006,10 +3006,13 @@ typedef struct nn_DriveState {
 } nn_DriveState;
 
 void nn_drive_seekPenalty(nn_Computer *C, size_t lastSector, size_t newSector, const nn_Drive *drive) {
+	// Check if SSD
+	if(drive->rpm == 0) return;
+
 	size_t maxSectors = drive->capacity / drive->sectorSize;
 	size_t sectorsPerPlatter = maxSectors / drive->platterCount;
 	// RPM over the number of sectors, over 60 seconds.
-	double latencyPerSector = (double)drive->rpm / maxSectors / 60;
+	double latencyPerSector = 1.0 / ((double)drive->rpm / 60 * maxSectors);
 
 	// magic
 	lastSector %= sectorsPerPlatter;