Apple-2-HW/RAM2GS
1
0
Fork 0
mirror of https://github.com/garrettsworkshop/RAM2GS.git synced 2024-12-26 06:30:59 +00:00
Code Issues Projects Releases Wiki Activity

Update RAM4GS-ExtSPI.v

Browse Source
This commit is contained in:
Zane Kaminski 2021-08-16 19:00:10 -04:00
parent 49f44f0b84
commit 3c767ecbad
1 changed files with 10 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
CPLD/RAM4GS-ExtSPI.v
View File

@ -1,5 +1,5 @@
module RAM4GS(PHI2, MAin, CROW, Din, Dout,
nCCAS, nCRAS, nFWE,
nCCAS, nCRAS, nFWE, LED,
RBA, RA, RD, nRCS, RCLK, RCKE,
nRWE, nRRAS, nRCAS, RDQMH, RDQML,
nUFMCS, UFMCLK, UFMSDI, UFMSDO);
@ -7,6 +7,10 @@ module RAM4GS(PHI2, MAin, CROW, Din, Dout,
/* 65816 Phase 2 Clock */
input PHI2;
/* Activity LED */
reg LEDEN = 0;
output LED = ~(~nCRAS && LEDEN);
/* Async. DRAM Control Inputs */
input nCCAS, nCRAS;
@ -363,13 +367,14 @@ module RAM4GS(PHI2, MAin, CROW, Din, Dout,
endcase
end else if (~InitReady && FS[17:10]==8'h03) begin
nUFMCS <= 1'b0;
UFMCLK <= 1'b0;
UFMCLK <= FS[4];
UFMSDI <= 1'b0;
// Latch n8MEGEN
if (FS[9:4]==6'h00 && FS[3:0]==4'hF) n8MEGEN <= ~UFMSDO;
// Latch n8MEGEN and LEDEN
if (FS[9:5]==5'h00 && FS[4:0]==5'h1F) n8MEGEN <= ~UFMSDO;
if (FS[9:5]==5'h01 && FS[4:0]==5'h1F) LEDEN <= ~UFMSDO;
end else if (~InitReady && FS[17:10]!=8'hFE && FS[17:10]!=8'hFF) begin
nUFMCS <= 1'b0;
UFMCLK <= FS[1];
UFMCLK <= FS[4];
UFMSDI <= 1'b0;
end else if (~InitReady) begin
nUFMCS <= 1'b1;