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-rw-r--r--com32/modules/chain.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/com32/modules/chain.c b/com32/modules/chain.c
index a162ca33..a9ebf767 100644
--- a/com32/modules/chain.c
+++ b/com32/modules/chain.c
@@ -328,6 +328,8 @@ static void do_boot(void *boot_sector, size_t boot_size,
struct syslinux_memmap *mmap;
struct syslinux_movelist *mlist = NULL;
addr_t dosmem = old_bios_fbm << 10;
+ uint8_t driveno = regs->edx.b[0];
+ uint8_t swapdrive = driveno & 0x80;
mmap = syslinux_memory_map();
@@ -336,10 +338,8 @@ static void do_boot(void *boot_sector, size_t boot_size,
return;
}
- if (opt.swap) {
+ if (opt.swap && driveno != swapdrive) {
uint8_t *p;
- uint8_t driveno = regs->edx.b[0];
- uint8_t swapdrive = driveno & 0x80;
regs->edx.b[0] = swapdrive;