pq-dos fdc decoder

-- RQ VG93
RT_F2_1 <='1' when (adress(7 downto 5)="001" and adress(1 downto 0)="11" and iorq='0' and dos='0' and rom14='0') or                         -- ROM14=0 BAS=0 ПЗУ SYS 3F
                        (adress(7 downto 5)="001" and adress(1 downto 0)="11" and iorq='0' and CPM='0' and rom14='1') else '0';                 -- CPM=1 & ROM14=1 ПЗУ DOS/ SOS 3F
RT_F2_2 <='1' when adress(7 downto 5)="101" and adress(1 downto 0)="11" and iorq='0' and CPM='0' and dos='1' and rom14='0' else '0';    -- CPM=1 & ROM14=0 BAS=1 ПЗУ 128 BF
RT_F2_3 <='1' when adress(7 downto 5)="111" and adress(1 downto 0)="11" and iorq='0' and CPM='1' and rom14='1' and dos='0' else '0';    -- CPM=0 & ROM14=1 BAS=0 ПЗУ DOS / SOS FF

csff <= RT_F2_1 or RT_F2_2 or RT_F2_3;

-- CS_VG93
RT_F1_1 <= '0' when adress(7)='0' and adress(1 downto 0)="11" and iorq='0' and CPM='0' and dos='1' and rom14='0' else '1';  -- CPM=1 & ROM14=0 BAS=1 ПЗУ 128 1F-7F
RT_F1_2 <= '0' when adress(7)='0' and adress(1 downto 0)="11" and iorq='0' and CPM='1' and rom14='1' and dos='0' else '1';  -- CPM=0 & ROM14=1 BAS=0 ПЗУ DOS / SOS 1F-7F
RT_F1 <= RT_F1_1 and RT_F1_2;

P0 <='0' when (adress(7)='1' and adress(4 downto 0)="00011" and iorq='0' and dos='0' and rom14='0') or          -- ROM14=0 BAS=0 ПЗУ SYS 83-E3
                    (adress(7)='1' and adress(4 downto 0)="00011" and iorq='0' and CPM='0' and rom14='1') else '1'; -- CPM=1 & ROM14=1 ПЗУ DOS/ SOS 83-E3

cswg <= RT_F1 and P0;

tr_dos_en <= dos or reg_dffd(4);
tr_dos <= tr_dos_en;