[PATCH 1/3] handle_1591: [INT15/AH=91h] Always set AH=0 and clear CF

[Lev Kujawski]

References:
  R. Brown, "INT 15 - OS HOOK - DEVICE POST (AT,PS)", in
  The x86 Interrupt List. https://www.cs.cmu.edu/~ralf/files.html
  [Updated: 2018-02-28].

F. v. Gilluwe, The Undocumented PC. Boston, MA: Addison-Wesley,
  1997, p. 780.

Signed-off-by: Lev Kujawski 
---
 src/system.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/system.c b/src/system.c
index 438e60e..ec99347 100644
--- a/src/system.c
+++ b/src/system.c
@@ -232,6 +232,7 @@ handle_1590(struct bregs *regs)
 static void
 handle_1591(struct bregs *regs)
 {
+    set_code_success(regs);
 }

// keyboard intercept