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docu updates [skip ci]

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wfjm
2022-12-21 12:58:05 +01:00
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doc/simh_diff_spl.md
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@@ -9,8 +9,12 @@ a situation suitable for interrupt response testing.
SimH does not implement this behavior, `SPL` behaves like all other
instructions, and interrupts or traps are honored after it completes.
xxdp `ekbbf0` test 32 depends on the 11/70 behavior and is skipped.
xxdp program `ekbbf0` test 032 depends on the 11/70 behavior and is skipped
(see [patch](../tools/xxdp/ekbbf0_patch_1170.scmd)).
The w11 implements 11/70 behavior for `SPL` in kernel mode only. In supervisor
or user mode `SPL` is a nop and honors traps and interrupts, see
[`SPL` on w11](w11a_diff_70_spl_bug.md).
Several [tcodes](../tools/tcode/README.md) utilize the `SPL` behavior and
are skipped when executed on SimH
(see [cpu_basics.mac](../tools/tcode/cpu_basics.mac) test F2.3).