From: notaz <notasas@gmail.com>
Date: Wed, 20 Sep 2017 20:43:38 +0000 (+0300)
Subject: memory: allow SRAM word writes
X-Git-Tag: v1.92~39
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;ds=sidebyside;h=1dd0871f208e59792aff088ea41f471673eeaa7e;p=picodrive.git

memory: allow SRAM word writes

Was allowing both low and high byte writes by byte, but not word,
which was stupid.
---

diff --git a/pico/memory.c b/pico/memory.c
index 4f38e5e..5be66f5 100644
--- a/pico/memory.c
+++ b/pico/memory.c
@@ -448,11 +448,14 @@ static void PicoWrite16_sram(u32 a, u32 d)
     EEPROM_write16(d);
   }
   else {
-    // XXX: hardware could easily use MSB too..
     u8 *pm = (u8 *)(SRam.data - SRam.start + a);
-    if (*pm != (u8)d) {
+    if (pm[0] != (u8)(d >> 8)) {
       SRam.changed = 1;
-      *pm = (u8)d;
+      pm[0] = (u8)(d >> 8);
+    }
+    if (pm[1] != (u8)d) {
+      SRam.changed = 1;
+      pm[1] = (u8)d;
     }
   }
 }