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changeset 19:925de5938e9a

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FPU opcodes 0xd9 0xd8-0xdf, despite being undefined, do not throw an illegal instruction exception. Eradicator now works.
author TomW
date Sat Aug 24 15:11:30 2013 +0100
parents b23d087f2489
children 62da6e2cb833
files src/x87.c
diffstat 1 files changed, 4 insertions(+), 0 deletions(-) [+]
line diff
     1.1 --- a/src/x87.c	Tue Aug 13 19:20:28 2013 +0100
     1.2 +++ b/src/x87.c	Sat Aug 24 15:11:30 2013 +0100
     1.3 @@ -414,6 +414,10 @@
     1.4                          if (fplog) pclog("FNOP\n");
     1.5                          cycles-=3;
     1.6                          return;
     1.7 +                        case 0xD8: case 0xD9: case 0xDA: case 0xDB: /*Invalid, but apparently not illegal*/
     1.8 +                        case 0xDC: case 0xDD: case 0xDE: case 0xDF:
     1.9 +                        cycles-=3;
    1.10 +                        return;
    1.11                          case 0xE0: /*FCHS*/
    1.12                          if (fplog) pclog("FCHS\n");
    1.13                          ST(0)=-ST(0);