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add handling of fields_f table (no decode yet)

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Raphael Jacquot 2019-02-12 08:56:15 +01:00
parent 407b0c6d8d
commit d7894d7963
2 changed files with 24 additions and 6 deletions
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28
saturn-decoder.v
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@ -119,7 +119,9 @@ end
// general variables
reg continue;
reg block_0x;
reg block_0Ex;
reg block_0Efx;
reg fields_f;
always @(posedge i_clk) begin
@ -148,7 +150,10 @@ always @(posedge i_clk) begin
// cleanup block variables
block_0x <= 0;
block_0Ex <= 0;
block_0Efx <= 0;
// cleanup fields table variables
fields_f <= 0;
// cleanup
o_direction <= 0;
@ -223,7 +228,8 @@ always @(posedge i_clk) begin
end
endcase
continue <= (i_nibble == 4'hE);
block_0Ex <= (i_nibble == 4'hE);
block_0Efx <= (i_nibble == 4'hE);
fields_f <= (i_nibble == 4'hE);
o_ins_decoded <= (i_nibble != 4'hE);
end
@ -233,12 +239,24 @@ always @(posedge i_clk) begin
*
*
*****************************************************************************/
if (continue && block_0Ex) begin
$display("block_0Ex: nibble %h not handled", i_nibble);
if (continue && block_0Efx && !fields_f) begin
$display("block_0Efx: nibble %h not handled", i_nibble);
continue <= 0;
o_dec_error <= 1;
end
/******************************************************************************
*
* fields f table
*
*
*****************************************************************************/
if (continue && fields_f) begin
$display("fields_f: nibble %h not handled", i_nibble);
fields_f <= 0;
end
end
end
end

2
testrom.hex
View file

@ -7,5 +7,5 @@
0 6 // RSTK=C
0 7 // C=RSTK
0 E
0 E D
F // end