From: Alan Cox <alan@linux.intel.com>
Date: Thu, 17 May 2018 12:03:30 +0000 (+0100)
Subject: 8086: while I remember document the early 8086 test in case we need it
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=e8f857c2fe50bc76b794bec4367728e94065901b;p=FUZIX.git

8086: while I remember document the early 8086 test in case we need it
---

diff --git a/Kernel/lowlevel-8086.S b/Kernel/lowlevel-8086.S
index 6e08d33b..f408bd07 100644
--- a/Kernel/lowlevel-8086.S
+++ b/Kernel/lowlevel-8086.S
@@ -288,6 +288,11 @@ set_irqvec:
  *
  *	We don't bother trying to tell 186/188 and 86/89 bus width as we
  *	don't need to know.
+ *
+ *	If we need to we can detect an early 8086 by setting a trace trap
+ *	and seeing if we take it on pop of a segment register. If we do it's
+ *	an early one. If it doesn't then its a later one (and if it also
+ *	doesn't take one on push of a segment register its a Harris CMOS one
  */
 
 test_cputype: