GB: Send LCD interrupt only if there is no INT 48h signal
- Fixes Speedy Gonzales status bar in GB emulated hardware type.
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@ -1270,6 +1270,7 @@ void gbWriteMemory(uint16_t address, uint8_t value)
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//register_STAT = (register_STAT & 0x87) |
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// (value & 0x7c);
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gbMemory[0xff41] = register_STAT = (value & 0xf8) | (register_STAT & 0x07); // fix ?
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// TODO:
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// GB bug from Devrs FAQ
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// http://www.devrs.com/gb/files/faqs.html#GBBugs
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// 2018-7-26 Backported STAT register bug behavior
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@ -1280,12 +1281,15 @@ void gbWriteMemory(uint16_t address, uint8_t value)
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// Games below relies on this bug, , and are incompatible with the GBC.
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// - Road Rash: crash after player screen
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// - Zerg no Densetsu: crash right after showing a small portion of intro
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// - 2019-07-18 - Speedy Gonzalez status bar relies on this as well.
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if ((gbHardware & 5)
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&& (((!gbInt48Signal) && (gbLcdMode < 2) && (register_LCDC & 0x80))
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|| (register_LY == register_LYC))) {
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gbMemory[0xff0f] = register_IF |=2;
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// send LCD interrupt only if no interrupt 48h signal...
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if (!gbInt48Signal)
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gbMemory[0xff0f] = register_IF |= 2;
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}
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gbInt48Signal &= ((register_STAT >> 3) & 0xF);
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@ -1307,7 +1311,7 @@ void gbWriteMemory(uint16_t address, uint8_t value)
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if (!gbInt48Signal) {
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gbMemory[0xff0f] = register_IF |= 2;
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}
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gbInt48Signal |= 4;
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//gbInt48Signal |= 4;
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}
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gbCompareLYToLYC();
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