mirror of
https://github.com/italicsjenga/agb.git
synced 2024-10-18 08:01:39 +11:00
41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
diff --git a/include/mgba/internal/gba/io.h b/include/mgba/internal/gba/io.h
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index 9875061f3..bdeafdcd3 100644
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--- a/include/mgba/internal/gba/io.h
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+++ b/include/mgba/internal/gba/io.h
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@@ -157,6 +157,7 @@ enum GBAIORegisters {
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REG_DEBUG_STRING = 0xFFF600,
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REG_DEBUG_FLAGS = 0xFFF700,
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REG_DEBUG_ENABLE = 0xFFF780,
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+ REG_DEBUG_CYCLES = 0xFFF800,
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};
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mLOG_DECLARE_CATEGORY(GBA_IO);
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diff --git a/src/gba/io.c b/src/gba/io.c
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index cc39e1192..d34dcb4b4 100644
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--- a/src/gba/io.c
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+++ b/src/gba/io.c
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@@ -573,6 +573,11 @@ void GBAIOWrite(struct GBA* gba, uint32_t address, uint16_t value) {
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case REG_DEBUG_ENABLE:
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gba->debug = value == 0xC0DE;
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return;
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+ case REG_DEBUG_CYCLES: {
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+ int32_t number_of_cycles = mTimingCurrentTime(&gba->timing);
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+ mLOG(GBA_DEBUG, INFO, "Cycles: %d Tag: %d", number_of_cycles, value);
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+ return;
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+ }
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case REG_DEBUG_FLAGS:
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if (gba->debug) {
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GBADebug(gba, value);
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@@ -936,6 +941,11 @@ uint16_t GBAIORead(struct GBA* gba, uint32_t address) {
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return 0x1DEA;
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}
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// Fall through
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+ case REG_DEBUG_CYCLES: {
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+ int32_t number_of_cycles = mTimingCurrentTime(&gba->timing);
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+ mLOG(GBA_DEBUG, INFO, "Cycles: %d", number_of_cycles);
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+ return number_of_cycles;
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+ }
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default:
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mLOG(GBA_IO, GAME_ERROR, "Read from unused I/O register: %03X", address);
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return GBALoadBad(gba->cpu);
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