a20 fix
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@477 c046a42c-6fe2-441c-8c8c-71466251a162
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@ -190,6 +190,10 @@ void cpu_x86_set_a20(CPUX86State *env, int a20_state)
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{
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a20_state = (a20_state != 0);
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if (a20_state != a20_enabled) {
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/* if the cpu is currently executing code, we must unlink it and
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all the potentially executing TB */
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cpu_interrupt(env, 0);
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/* when a20 is changed, all the MMU mappings are invalid, so
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we must flush everything */
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page_unmap();
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