From 32031d0f6763a74a143b6b2fed2982080a2a8772 Mon Sep 17 00:00:00 2001
From: alyosha-tas <alexei.f.k@gmail.com>
Date: Fri, 3 Jul 2020 16:07:26 -0400
Subject: [PATCH] Atari 7800: support serpentine
---
Assets/gamedb/gamedb_a7800.txt | 1 +
.../Consoles/Atari/A7800Hawk/A7800Hawk.cs | 8 +++++++-
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/Assets/gamedb/gamedb_a7800.txt b/Assets/gamedb/gamedb_a7800.txt
index cb5ecabc32..4c3ebde33d 100644
--- a/Assets/gamedb/gamedb_a7800.txt
+++ b/Assets/gamedb/gamedb_a7800.txt
@@ -150,6 +150,7 @@ md5:980c35ae9625773a450aa7ef51751c04 Scrapyard Dog A78 NTSC=true;board=1
md5:53db322c201323fe2ca8f074c0a2bf86 Scrapyard Dog A78 PAL=true;board=1
md5:b697d9c2d1b9f6cb21041286d1bbfa7f Sentinel A78 NTSC=true;board=1
md5:5469b4de0608f23a5c4f98f331c9e75f Sentinel A78 PAL=true;board=1
+md5:9bd70c06d3386f76f8162881699a777a Serpentine A78 NTSC=true;board=1;RAM=16
md5:2d643ac548c40e58c99d0fe433ba4ba0 Sirius A78 NTSC=true;board=1;RAM=16
md5:a84c1b2300fbfbf21b1c02387f613dad Space Duel A78 PAL=true;board=0
md5:771cb4609347657f63e6f0eb26036e35 Space Duel A78 NTSC=true;board=0
diff --git a/src/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs b/src/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs
index 4b7c19e78b..7e53aefefe 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Atari/A7800Hawk/A7800Hawk.cs
@@ -186,7 +186,13 @@ namespace BizHawk.Emulation.Cores.Atari.A7800Hawk
if (cart_2.Bit(2))
{
cart_RAM = 8;
- }
+
+ // the homebrew game serpentine requires extra RAM, seems to use bit 6 to indicate this
+ if (cart_2.Bit(6))
+ {
+ cart_RAM = 16;
+ }
+ }
}
else
{