diff options
| -rw-r--r-- | engines/sci/engine/kmisc.cpp | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/engines/sci/engine/kmisc.cpp b/engines/sci/engine/kmisc.cpp index 2f0072ec67..90ae88b73f 100644 --- a/engines/sci/engine/kmisc.cpp +++ b/engines/sci/engine/kmisc.cpp @@ -63,14 +63,27 @@ reg_t kHaveMouse(EngineState *s, int funct_nr, int argc, reg_t *argv) { return make_reg(0, -1); } +enum kMemoryInfoFunc { + K_MEMORYINFO_LARGEST_HEAP_BLOCK = 0, // Largest heap block available + K_MEMORYINFO_FREE_HEAP = 1, // Total free heap memory + K_MEMORYINFO_LARGEST_HUNK_BLOCK = 2, // Largest available hunk memory block + K_MEMORYINFO_FREE_HUNK = 3, // Amount of free DOS paragraphs + K_MEMORYINFO_TOTAL_HUNK = 4 // Total amount of hunk memory (SCI01) +}; + reg_t kMemoryInfo(EngineState *s, int funct_nr, int argc, reg_t *argv) { + uint16 size = 0x7fff; // Must not be 0xffff, or some memory calculations will overflow + switch (argv[0].offset) { - case 0: // Total free heap memory - case 1: // Largest heap block available - case 2: // Largest available hunk memory block - case 3: // Total amount of hunk memory - case 4: // Amount of free DOS paragraphs- SCI01 - return make_reg(0, 0x7fff); // Must not be 0xffff, or some memory calculations will overflow + case K_MEMORYINFO_LARGEST_HEAP_BLOCK: + // In order to prevent "Memory fragmented" dialogs from + // popping up in some games, we must return FREE_HEAP - 2 here. + return make_reg(0, size - 2); + case K_MEMORYINFO_FREE_HEAP: + case K_MEMORYINFO_LARGEST_HUNK_BLOCK: + case K_MEMORYINFO_FREE_HUNK: + case K_MEMORYINFO_TOTAL_HUNK: + return make_reg(0, size); default: warning("Unknown MemoryInfo operation: %04x", argv[0].offset); |