From 9cc01bb6f7ed631e768a66dfe3a97be24eb5cbb5 Mon Sep 17 00:00:00 2001
From: Guy Perfect <guytpk@gmail.com>
Date: Mon, 28 Oct 2024 19:20:08 -0500
Subject: [PATCH] CCSR.CC_Rd does not require a communication

---
 core/bus.c | 2 +-
 core/ext.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/bus.c b/core/bus.c
index 8ffaf0f..a03d9e1 100644
--- a/core/bus.c
+++ b/core/bus.c
@@ -104,8 +104,8 @@ static int32_t busReadMisc(VB *sim, uint8_t address, int type) {
         case 0x18>>2: return sim->tmr.counter      & 0xFF;         /* TLR */
         case 0x1C>>2: return sim->tmr.counter >> 8 & 0xFF;         /* THR */
         case 0x20>>2: return tmrReadControl(sim);                  /* TCR */
-        case 0x28>>2: return padReadControl(sim);                  /* SCR */
         case 0x24>>2: return sim->wcr.exp1w << 1 | sim->wcr.rom1w; /* WCR */
+        case 0x28>>2: return padReadControl(sim);                  /* SCR */
     }
 
     /* Unmapped */
diff --git a/core/ext.c b/core/ext.c
index cc5f45b..6d91bd8 100644
--- a/core/ext.c
+++ b/core/ext.c
@@ -82,6 +82,8 @@ static int32_t extReadCCR(VB *sim) {
 
 /* Read a value from CCSR */
 static int32_t extReadCCSR(VB *sim) {
+    sim->ext.cc_rd = sim->ext.cc_wr &
+        (sim->peer == NULL ? 1 : sim->peer->ext.cc_wr);
     return 0x60 |
         sim->ext.cc_int_inh << 7 |
         sim->ext.cc_int_lev << 4 |