From 25559e5417bc3f9ca73e006fb070973439795a81 Mon Sep 17 00:00:00 2001
From: kub <derkub@gmail.com>
Date: Sun, 30 Jun 2024 17:55:37 +0200
Subject: [PATCH] sms, add sram in codemasters mapper
---
pico/sms.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/pico/sms.c b/pico/sms.c
index 3313e02c..5ac0b919 100644
--- a/pico/sms.c
+++ b/pico/sms.c
@@ -340,7 +340,7 @@ static void write_bank_sega(unsigned short a, unsigned char d)
}
}
-// Codemasters mapper. Similar to Sega, but different addresses, TODO: SRAM
+// Codemasters mapper. Similar to Sega, but different addresses
static void write_bank_codem(unsigned short a, unsigned char d)
{
if (a >= 0xc000 || (a & 0x3fff)) return; // address is 0x0000, 0x4000, 0x8000?
@@ -352,6 +352,14 @@ static void write_bank_codem(unsigned short a, unsigned char d)
d &= bank_mask;
z80_map_set(z80_read_map, a, a+0x3fff, Pico.rom + (d << 14), 0);
+ if (Pico.ms.carthw[1] & 0x80) {
+ z80_map_set(z80_read_map, 0xa000, 0xbfff, PicoMem.vram+0x4000, 0);
+ z80_map_set(z80_write_map, 0xa000, 0xbfff, PicoMem.vram+0x4000, 0);
+ } else {
+ d = Pico.ms.carthw[2] & bank_mask;
+ z80_map_set(z80_read_map, 0xa000, 0xbfff, Pico.rom + (d << 14)+0x2000, 0);
+ z80_map_set(z80_write_map, 0xa000, 0xbfff, xwrite, 1);
+ }
}
// MSX mapper. 4 selectable 8KB banks at the top
--
2.39.5