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Further improvements to the clocking of the 6809 for Roland to try

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Change-Id: Ida0384c65ca405f50652a3c26665d1c5adac0748
This commit is contained in:
David Banks
2015-07-19 18:04:22 +01:00
parent 66b65f1bd6
commit aeed6c1a65
3 changed files with 3 additions and 3 deletions
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MC6809CpuMon.bit
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2
firmware/AtomBusMon.c
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@@ -10,7 +10,7 @@
* VERSION and NAME are used in the start-up message * VERSION and NAME are used in the start-up message
********************************************************/ ********************************************************/
#define VERSION "0.62" #define VERSION "0.63"
#if (CPU == Z80) #if (CPU == Z80)
#define NAME "ICE-T80" #define NAME "ICE-T80"

4
src/MC6809ECpuMon.vhd
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@@ -293,9 +293,9 @@ begin
begin begin
if falling_edge(E) then if falling_edge(E) then
Din <= Data; Din <= Data;
memory_din <= Data;
end if; end if;
end process; end process;
memory_din <= Data;
Data <= memory_dout when TSC = '0' and E = '1' and memory_wr = '1' else Data <= memory_dout when TSC = '0' and E = '1' and memory_wr = '1' else
Dout when TSC = '0' and E = '1' and R_W_n_int = '0' and memory_rd = '0' else Dout when TSC = '0' and E = '1' and R_W_n_int = '0' and memory_rd = '0' else
@@ -336,7 +336,7 @@ begin
-- Main clocks -- Main clocks
cpu_clk <= Q; cpu_clk <= Q;
busmon_clk <= not Q; busmon_clk <= E;
-- Quadrature clock generator, unused in 6809E mode -- Quadrature clock generator, unused in 6809E mode
quadrature_gen : process(EXTAL) quadrature_gen : process(EXTAL)