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New RAM /OE control so it doesn't bus fight

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This commit is contained in:
Zane Kaminski 2024-10-07 07:53:41 -04:00
parent a7632a3057
commit 53bc4c08bd
1 changed files with 6 additions and 1 deletions
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7
cpld/RAM.v
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@ -37,10 +37,15 @@ module RAM(
/* RAM control signals */
assign nRAS = !((!nAS && RAMCS && RASEN) || RASrf);
assign nOE = 0;//!( !nAS && RAMCS && BACTr);
assign nLWE = !(!nLDS && RASEL && !nWE);
assign nUWE = !(!nUDS && RASEL && !nWE);
/* RAM /OE control */
always @(posedge CLK) begin
if (nAS) nOE <= 1;
else nOE <= !(BACT && RAMCS0X && nWE);
end
/* ROM control signals */
assign nROMOE = !(!nAS && ROMCS && nWE);
assign nROMWE = !(!nAS && ROMCS4X && !nWE && BACTr);