bootrom: removed 'ABC' output on UART

diff --git a/2_isa/src/bootrom.s b/2_isa/src/bootrom.s
index bfc81890abd408ba06dc782e3e5249a2b978ad45..cb4ac8d8864a1859f82e38ec9ffa61ac1ff94b44 100644 (file)
--- a/2_isa/src/bootrom.s
+++ b/2_isa/src/bootrom.s
@@ -178,13 +178,4 @@ bt_T:
        br bootrom
 
 bt_J:
-tehend:
-       xor r1, r1, r1
-       ldi r1, 0x41 ; 'A'
-       call send_byte
-       xor r1, r1, r1
-       ldi r1, 0x42 ; 'B'
-       call send_byte
-       xor r1, r1, r1
-       ldi r1, 0x43 ; 'C'
-       call send_byte
+       ; 'overflow' ROM

diff --git a/cpu/src/rom_b.vhd b/cpu/src/rom_b.vhd
index 8606702a0e322ce036b8b0f5ae9d4965f91f4d5a..8d9814f85a92fd8f69f82cde042e245c3068e2ac 100644 (file)
--- a/cpu/src/rom_b.vhd
+++ b/cpu/src/rom_b.vhd
@@ -207,15 +207,6 @@ begin
        when "1010001" => data_out <= x"e7090000"; -- ldw r1, 0(r2)
        when "1010010" => data_out <= x"eb7fdf85"; -- call send_word
        when "1010011" => data_out <= x"eb7fed81"; -- br bootrom
-       when "1010100" => data_out <= x"e4088800"; -- xor r1, r1, r1
-       when "1010101" => data_out <= x"ed080208"; -- ldi r1, 0x41 
-       when "1010110" => data_out <= x"eb7fdb05"; -- call send_byte
-       when "1010111" => data_out <= x"e4088800"; -- xor r1, r1, r1
-       when "1011000" => data_out <= x"ed080210"; -- ldi r1, 0x42 
-       when "1011001" => data_out <= x"eb7fd985"; -- call send_byte
-       when "1011010" => data_out <= x"e4088800"; -- xor r1, r1, r1
-       when "1011011" => data_out <= x"ed080218"; -- ldi r1, 0x43 
-       when "1011100" => data_out <= x"eb7fd805"; -- call send_byte
        -- just nop until rom end!
        when others => data_out <= x"fd000000";
                        end case;