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Added a jumper enabled fakeTube register at 0xFEE0 with value 0xFE to work around a beeb issue with pullups, incremented version to 0.28

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Change-Id: I6b7b79cb01aa350b0caca27e75fb9c689558bcec
This commit is contained in:
David Banks
2015-06-18 11:01:06 +01:00
parent 35f8b5419a
commit 35ad735420
4 changed files with 10 additions and 3 deletions
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AtomCpuMon.bit
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2
firmware/AtomBusMon.c
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@@ -113,7 +113,7 @@ char *triggerStrings[NUM_TRIGGERS] = {
}; };
#define VERSION "0.27" #define VERSION "0.28"
#ifdef EMBEDDED_6502 #ifdef EMBEDDED_6502
#define NUM_CMDS 24 #define NUM_CMDS 24

2
src/AtomCpuMon.ucf
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@@ -64,7 +64,7 @@ NET "avr_RxD" LOC="P15" | IOSTANDARD = LVCMOS33 ;
NET "trig<0>" LOC="P62" | IOSTANDARD = LVCMOS33 ; NET "trig<0>" LOC="P62" | IOSTANDARD = LVCMOS33 ;
NET "trig<1>" LOC="P63" | IOSTANDARD = LVCMOS33 ; NET "trig<1>" LOC="P63" | IOSTANDARD = LVCMOS33 ;
NET "fakeTube_n" LOC="P65" | IOSTANDARD = LVCMOS33 ;
# NET "" LOC="P48" | IOSTANDARD = LVCMOS33 ; # connector pin E2 # NET "" LOC="P48" | IOSTANDARD = LVCMOS33 ; # connector pin E2
# NET "" LOC="P49" | IOSTANDARD = LVCMOS33 ; # connector pin E3 # NET "" LOC="P49" | IOSTANDARD = LVCMOS33 ; # connector pin E3

9
src/AtomCpuMon.vhd
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@@ -42,6 +42,9 @@ entity AtomCpuMon is
-- External trigger inputs -- External trigger inputs
trig : in std_logic_vector(1 downto 0); trig : in std_logic_vector(1 downto 0);
-- Jumpers
fakeTube_n : in std_logic;
-- Serial Console -- Serial Console
avr_RxD : in std_logic; avr_RxD : in std_logic;
@@ -158,7 +161,11 @@ begin
data_latch : process(Phi0) data_latch : process(Phi0)
begin begin
if falling_edge(Phi0) then if falling_edge(Phi0) then
Din <= Data; if (fakeTube_n = '0' and Addr_int = x"FEE0") then
Din <= x"FE";
else
Din <= Data;
end if;
memory_din <= Data; memory_din <= Data;
end if; end if;
end process; end process;