git.y1.nz

commit e9be438d9109af815f8e7b9d85fdb0de2092b7c9
parent 1b50856dcfd07b538933b59f23a93db64384d92c
Author: Lior Halphon <LIJI32@gmail.com>
Date:   Tue,  4 Jul 2023 00:21:57 +0300

Turns out jr triggers the OAM bug, thanks Sono!

Diffstat:
M
Core/sm83_cpu.c
8
++++----

1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/Core/sm83_cpu.c b/Core/sm83_cpu.c
@@ -721,9 +721,9 @@ static void rra(GB_gameboy_t *gb, uint8_t opcode)
 
 static void jr_r8(GB_gameboy_t *gb, uint8_t opcode)
 {
-    /* Todo: Verify timing */
-    gb->pc += (int8_t)cycle_read(gb, gb->pc) + 1;
-    cycle_no_access(gb);
+    int8_t offset = (int8_t)cycle_read(gb, gb->pc++);
+    cycle_oam_bug_pc(gb);
+    gb->pc += offset;
 }
 
 static bool condition_code(GB_gameboy_t *gb, uint8_t opcode)
@@ -748,7 +748,7 @@ static void jr_cc_r8(GB_gameboy_t *gb, uint8_t opcode)
     int8_t offset = cycle_read(gb, gb->pc++);
     if (condition_code(gb, opcode)) {
         gb->pc += offset;
-        cycle_no_access(gb);
+        cycle_oam_bug_pc(gb);
     }
 }
 

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