Overhauled the SiS 496/497 chipset emulation (and added the DRB locking to it) (later Zida Tomato 4DPS BIOS'es now work, and we now use the actual 1.72), fixed the W83787F and FDC37C932FR Super I/O chips, removed the no longer needed Acer M3A registers (that's now correctly handled as FDC37C932FR GPIO), and a number of bugfixes here and there.

src/cpu/808x.c

@@ -977,6 +977,7 @@ reset_common(int hard)
 
     in_smm = smi_latched = 0;
     smi_line = smm_in_hlt = 0;
+    smi_block = 0;
 
     if (hard) {
 	smbase = 0x00030000;