ncr may be null if accelerator with SCSI IO but no controller chip.

diff --git a/ncr9x_scsi.cpp b/ncr9x_scsi.cpp
index da5b6284e9efa4af8ef862a4a5eee134240a4bf8..ec656cc121ca72b5a96563cf55ea23036906f19e 100644 (file)
--- a/ncr9x_scsi.cpp
+++ b/ncr9x_scsi.cpp
@@ -669,6 +669,9 @@ static void ncr9x_io_bput(struct ncr9x_state *ncr, uaecptr addr, uae_u32 val)
        int reg_shift = 2;
        uaecptr oldaddr = addr;
 
+       if (!ncr)
+               return;
+
        addr &= ncr->board_mask;
 
        if (isncr(ncr, ncr_scram5394_scsi)) {
@@ -1006,6 +1009,9 @@ static uae_u32 ncr9x_io_bget(struct ncr9x_state *ncr, uaecptr addr)
        int reg_shift = 2;
        uaecptr oldaddr = addr;
 
+       if (!ncr)
+               return v;
+
        addr &= ncr->board_mask;
 
        if (isncr(ncr, ncr_scram5394_scsi)) {