From: Toni Wilen <twilen@winuae.net>
Date: Fri, 23 Sep 2022 17:35:32 +0000 (+0300)
Subject: A1000 memory power up pattern
X-Git-Tag: 41000~139
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=d0619219a6877d59a58de13517244fdc02dc0f6c;p=francis%2Fwinuae.git

A1000 memory power up pattern
---

diff --git a/memory.cpp b/memory.cpp
index 86a17350..ff8f14fd 100644
--- a/memory.cpp
+++ b/memory.cpp
@@ -2625,7 +2625,7 @@ static void fillpattern(addrbank *ab)
 				}
 			}
 		}
-	} else if (currprefs.cs_memorypatternfill) {
+	} else if (currprefs.cs_memorypatternfill && !currprefs.cs_dipagnus) {
 		// OCS Agnus has swapped row and column compared to ECS and AGA.
 		uae_u16 fillval = 0;
 		for (int fillbank = 0; fillbank < ab->allocated_size / 256; fillbank++) {
@@ -2635,6 +2635,19 @@ static void fillpattern(addrbank *ab)
 				*((uae_u16 *)(ab->baseaddr + fillbank * 256 + fillrow)) = fillval;
 			}
 		}
+	} else if (currprefs.cs_memorypatternfill) {
+		// A1000
+		uae_u16 fillval = 0;
+		for (int fillbank = 0; fillbank < ab->allocated_size / 512; fillbank++) {
+			fillval = ~fillval;
+			for (int fillrow = 0; fillrow < 512; fillrow += 2) {
+				// Chip emulated: Generic 4256.  16 * 512x1.
+				*((uae_u16 *)(ab->baseaddr + fillbank * 512 + fillrow)) = fillval;
+				if (((fillrow >> 1) & 15) == 15) {
+					fillval = ~fillval;
+				}
+			}
+		}
 	} else {
 		memset(ab->baseaddr, 0, ab->allocated_size);
 	}