Merge branch 'iret' into 'master'

修改中断返回指令 See merge request engintime/Dream-Logic/Intel-classic-chips/8086!16

Merge branch 'iret' into 'master'
292b253e · 李川 · 68d72d17 · 18bbda9a · 292b253e · 292b253e
--- a/rom.dbg
+++ b/rom.dbg
--- a/rom.lst
+++ b/rom.lst
--- a/rom.masm
+++ b/rom.masm
@@ -903,6 +903,8 @@ path [mar], flag
 ; 出栈后栈顶指针寄存器sp加1，指向先于标志寄存器入栈的对象
 path sp, a
 path alu_inc, sp
+; 查询中断请求，若存在，则继续处理中断
 check irq
 reset upc