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pdp11_vmbox: BUGFIX: correct red/yellow zone boundary

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wfjm
2022-11-20 13:14:23 +01:00
parent 695e49dad0
commit b5189053d3
3 changed files with 118 additions and 27 deletions
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15
rtl/w11a/pdp11_vmbox.vhd
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@@ -1,6 +1,6 @@
-- $Id: pdp11_vmbox.vhd 1170 2019-06-22 20:58:52Z mueller $
-- $Id: pdp11_vmbox.vhd 1317 2022-11-19 15:33:42Z mueller $
-- SPDX-License-Identifier: GPL-3.0-or-later
-- Copyright 2006-2019 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
-- Copyright 2006-2022 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
--
------------------------------------------------------------------------------
-- Module Name: pdp11_vmbox - syn
@@ -14,10 +14,11 @@
--
-- Test bench: tb/tb_pdp11_core (implicit)
-- Target Devices: generic
-- Tool versions: ise 8.2-14.7; viv 2014.4-2016.1; ghdl 0.18-0.33
-- Tool versions: ise 8.2-14.7; viv 2014.4-2022.1; ghdl 0.18-2.0.0
--
-- Revision History:
-- Date Rev Version Comment
-- 2022-11-18 1317 1.6.8 BUGFIX: correct red/yellow zone boundary
-- 2019-06-22 1170 1.6.7 support membe for em cacc access
-- 2016-05-22 767 1.6.6 don't init N_REGS (vivado fix for fsm inference)
-- 2015-07-03 697 1.6.5 much wider DM_STAT_VM
@@ -366,13 +367,15 @@ begin
is_stackyellow := '0';
is_stackred := '0';
if unsigned(VM_ADDR(15 downto 8)) <= unsigned(R_SLIM) then
is_stackyellow := '1';
if unsigned(VM_ADDR(7 downto 5)) /= 7 then -- below 340
if unsigned(VM_ADDR(15 downto 8)) = unsigned(R_SLIM) and
unsigned(VM_ADDR(7 downto 5)) = 7 then
is_stackyellow := '1';
else
is_stackred := '1';
end if;
end if;
if VM_ADDR(15 downto 1) = "111111111111111" then -- vaddr == 177776
if VM_ADDR(15 downto 1) = "111111111111111" then -- PSW protection
is_stackred := '1';
end if;