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//////////////////////////////////////////////////////////////////////
////                                                              ////
////  Generic Single-Port Synchronous RAM                         ////
////                                                              ////
////  This file is part of memory library available from          ////
////  http://www.opencores.org/cvsweb.shtml/generic_memories/     ////
////                                                              ////
////  Description                                                 ////
////  This block is a wrapper with common single-port             ////
////  synchronous memory interface for different                  ////
////  types of ASIC and FPGA RAMs. Beside universal memory        ////
////  interface it also provides behavioral model of generic      ////
////  single-port synchronous RAM.                                ////
////  It should be used in all OPENCORES designs that want to be  ////
////  portable accross different target technologies and          ////
////  independent of target memory.                               ////
////                                                              ////
////  Supported ASIC RAMs are:                                    ////
////  - Artisan Single-Port Sync RAM                              ////
////  - Avant! Two-Port Sync RAM (*)                              ////
////  - Virage Single-Port Sync RAM                               ////
////  - Virtual Silicon Single-Port Sync RAM                      ////
////                                                              ////
////  Supported FPGA RAMs are:                                    ////
////  - Xilinx Virtex RAMB4_S16                                   ////
////  - Altera LPM                                                ////
////                                                              ////
////  To Do:                                                      ////
////   - xilinx rams need external tri-state logic                ////
////   - fix avant! two-port ram                                  ////
////   - add additional RAMs                                      ////
////                                                              ////
////  Author(s):                                                  ////
////      - Damjan Lampret, lampret@opencores.org                 ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////
////                                                              ////
//// This source file may be used and distributed without         ////
//// restriction provided that this copyright statement is not    ////
//// removed from the file and that any derivative work contains  ////
//// the original copyright notice and the associated disclaimer. ////
////                                                              ////
//// This source file is free software; you can redistribute it   ////
//// and/or modify it under the terms of the GNU Lesser General   ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any   ////
//// later version.                                               ////
////                                                              ////
//// This source is distributed in the hope that it will be       ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
//// PURPOSE.  See the GNU Lesser General Public License for more ////
//// details.                                                     ////
////                                                              ////
//// You should have received a copy of the GNU Lesser General    ////
//// Public License along with this source; if not, download it   ////
//// from http://www.opencores.org/lgpl.shtml                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
//
// CVS Revision History
//
// $Log: not supported by cvs2svn $
// Revision 1.3.4.2  2003/12/09 11:46:48  simons
// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.
//
// Revision 1.3.4.1  2003/07/08 15:36:37  lampret
// Added embedded memory QMEM.
//
// Revision 1.3  2003/04/07 01:19:07  lampret
// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.
//
// Revision 1.2  2002/10/17 20:04:40  lampret
// Added BIST scan. Special VS RAMs need to be used to implement BIST.
//
// Revision 1.1  2002/01/03 08:16:15  lampret
// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
//
// Revision 1.8  2001/11/02 18:57:14  lampret
// Modified virtual silicon instantiations.
//
// Revision 1.7  2001/10/21 17:57:16  lampret
// Removed params from generic_XX.v. Added translate_off/on in sprs.v and id.v. Removed spr_addr from dc.v and ic.v. Fixed CR+LF.
//
// Revision 1.6  2001/10/14 13:12:09  lampret
// MP3 version.
//
// Revision 1.1.1.1  2001/10/06 10:18:36  igorm
// no message
//
// Revision 1.1  2001/08/09 13:39:33  lampret
// Major clean-up.
//
// Revision 1.2  2001/07/30 05:38:02  lampret
// Adding empty directories required by HDL coding guidelines
//
//
 
// synopsys translate_off
`include "timescale.v"
// synopsys translate_on
`include "or1200_defines.v"
 
module or1200_spram_1024x32(
`ifdef OR1200_BIST
        // RAM BIST
        mbist_si_i, mbist_so_o, mbist_ctrl_i,
`endif
        // Generic synchronous single-port RAM interface
        clk, rst, ce, we, oe, addr, di, do
);
 
//
// Default address and data buses width
//
parameter aw = 10;
parameter dw = 32;
 
`ifdef OR1200_BIST
//
// RAM BIST
//
input mbist_si_i;
input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
output mbist_so_o;
`endif
 
//
// Generic synchronous single-port RAM interface
//
input                   clk;    // Clock
input                   rst;    // Reset
input                   ce;     // Chip enable input
input                   we;     // Write enable input
input                   oe;     // Output enable input
input   [aw-1:0] addr;   // address bus inputs
input   [dw-1:0] di;     // input data bus
output  [dw-1:0] do;     // output data bus
 
//
// Internal wires and registers
//
 
`ifdef OR1200_ARTISAN_SSP
`else
`ifdef OR1200_VIRTUALSILICON_SSP
`else
`ifdef OR1200_BIST
assign mbist_so_o = mbist_si_i;
`endif
`endif
`endif
 
`ifdef OR1200_ARTISAN_SSP
 
//
// Instantiation of ASIC memory:
//
// Artisan Synchronous Single-Port RAM (ra1sh)
//
`ifdef UNUSED
art_hssp_1024x32 #(dw, 1<<aw, aw) artisan_ssp(
`else
`ifdef OR1200_BIST
art_hssp_1024x32_bist artisan_ssp(
`else
art_hssp_1024x32 artisan_ssp(
`endif
`endif
`ifdef OR1200_BIST
        // RAM BIST
        .mbist_si_i(mbist_si_i),
        .mbist_so_o(mbist_so_o),
        .mbist_ctrl_i(mbist_ctrl_i),
`endif
        .CLK(clk),
        .CEN(~ce),
        .WEN(~we),
        .A(addr),
        .D(di),
        .OEN(~oe),
        .Q(do)
);
 
`else
 
`ifdef OR1200_AVANT_ATP
 
//
// Instantiation of ASIC memory:
//
// Avant! Asynchronous Two-Port RAM
//
avant_atp avant_atp(
        .web(~we),
        .reb(),
        .oeb(~oe),
        .rcsb(),
        .wcsb(),
        .ra(addr),
        .wa(addr),
        .di(di),
        .do(do)
);
 
`else
 
`ifdef OR1200_VIRAGE_SSP
 
//
// Instantiation of ASIC memory:
//
// Virage Synchronous 1-port R/W RAM
//
virage_ssp virage_ssp(
        .clk(clk),
        .adr(addr),
        .d(di),
        .we(we),
        .oe(oe),
        .me(ce),
        .q(do)
);
 
`else
 
`ifdef OR1200_VIRTUALSILICON_SSP
 
//
// Instantiation of ASIC memory:
//
// Virtual Silicon Single-Port Synchronous SRAM
//
`ifdef UNUSED
vs_hdsp_1024x32 #(1<<aw, aw-1, dw-1) vs_ssp(
`else
`ifdef OR1200_BIST
vs_hdsp_1024x32_bist vs_ssp(
`else
vs_hdsp_1024x32 vs_ssp(
`endif
`endif
`ifdef OR1200_BIST
        // RAM BIST
        .mbist_si_i(mbist_si_i),
        .mbist_so_o(mbist_so_o),
        .mbist_ctrl_i(mbist_ctrl_i),
`endif
        .CK(clk),
        .ADR(addr),
        .DI(di),
        .WEN(~we),
        .CEN(~ce),
        .OEN(~oe),
        .DOUT(do)
);
 
`else
 
`ifdef OR1200_XILINX_RAMB4
 
//
// Instantiation of FPGA memory:
//
// Virtex/Spartan2
//
 
//
// Block 0
//
RAMB4_S4 ramb4_s4_0(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[3:0]),
        .EN(ce),
        .WE(we),
        .DO(do[3:0])
);
 
//
// Block 1
//
RAMB4_S4 ramb4_s4_1(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[7:4]),
        .EN(ce),
        .WE(we),
        .DO(do[7:4])
);
 
//
// Block 2
//
RAMB4_S4 ramb4_s4_2(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[11:8]),
        .EN(ce),
        .WE(we),
        .DO(do[11:8])
);
 
//
// Block 3
//
RAMB4_S4 ramb4_s4_3(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[15:12]),
        .EN(ce),
        .WE(we),
        .DO(do[15:12])
);
 
//
// Block 4
//
RAMB4_S4 ramb4_s4_4(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[19:16]),
        .EN(ce),
        .WE(we),
        .DO(do[19:16])
);
 
//
// Block 5
//
RAMB4_S4 ramb4_s4_5(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[23:20]),
        .EN(ce),
        .WE(we),
        .DO(do[23:20])
);
 
//
// Block 6
//
RAMB4_S4 ramb4_s4_6(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[27:24]),
        .EN(ce),
        .WE(we),
        .DO(do[27:24])
);
 
//
// Block 7
//
RAMB4_S4 ramb4_s4_7(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[31:28]),
        .EN(ce),
        .WE(we),
        .DO(do[31:28])
);
 
`else
 
`ifdef OR1200_ALTERA_LPM
 
//
// Instantiation of FPGA memory:
//
// Altera LPM
//
// Added By Jamil Khatib
//
 
wire    wr;
 
assign  wr = ce & we;
 
initial $display("Using Altera LPM.");
 
lpm_ram_dq lpm_ram_dq_component (
        .address(addr),
        .inclock(clk),
        .outclock(clk),
        .data(di),
        .we(wr),
        .q(do)
);
 
defparam lpm_ram_dq_component.lpm_width = dw,
        lpm_ram_dq_component.lpm_widthad = aw,
        lpm_ram_dq_component.lpm_indata = "REGISTERED",
        lpm_ram_dq_component.lpm_address_control = "REGISTERED",
        lpm_ram_dq_component.lpm_outdata = "UNREGISTERED",
        lpm_ram_dq_component.lpm_hint = "USE_EAB=ON";
        // examplar attribute lpm_ram_dq_component NOOPT TRUE
 
`else
 
//
// Generic single-port synchronous RAM model
//
 
//
// Generic RAM's registers and wires
//
reg     [dw-1:0] mem [(1<<aw)-1:0];       // RAM content
reg     [dw-1:0] do_reg;                 // RAM data output register
 
//
// Data output drivers
//
assign do = (oe) ? do_reg : {dw{1'b0}};
 
//
// RAM read and write
//
always @(posedge clk)
        if (ce && !we)
                do_reg <= #1 mem[addr];
        else if (ce && we)
                mem[addr] <= #1 di;
 
`endif  // !OR1200_ALTERA_LPM
`endif  // !OR1200_XILINX_RAMB4_S16
`endif  // !OR1200_VIRTUALSILICON_SSP
`endif  // !OR1200_VIRAGE_SSP
`endif  // !OR1200_AVANT_ATP
`endif  // !OR1200_ARTISAN_SSP
 
endmodule

Line No.	Rev	Author	Line
1	504	lampret	`//////////////////////////////////////////////////////////////////////`
2			`//// ////`
3			`//// Generic Single-Port Synchronous RAM ////`
4			`//// ////`
5			`//// This file is part of memory library available from ////`
6			`//// http://www.opencores.org/cvsweb.shtml/generic_memories/ ////`
7			`//// ////`
8			`//// Description ////`
9			`//// This block is a wrapper with common single-port ////`
10			`//// synchronous memory interface for different ////`
11			`//// types of ASIC and FPGA RAMs. Beside universal memory ////`
12			`//// interface it also provides behavioral model of generic ////`
13			`//// single-port synchronous RAM. ////`
14			`//// It should be used in all OPENCORES designs that want to be ////`
15			`//// portable accross different target technologies and ////`
16			`//// independent of target memory. ////`
17			`//// ////`
18			`//// Supported ASIC RAMs are: ////`
19			`//// - Artisan Single-Port Sync RAM ////`
20			`//// - Avant! Two-Port Sync RAM (*) ////`
21			`//// - Virage Single-Port Sync RAM ////`
22			`//// - Virtual Silicon Single-Port Sync RAM ////`
23			`//// ////`
24			`//// Supported FPGA RAMs are: ////`
25			`//// - Xilinx Virtex RAMB4_S16 ////`
26	1129	lampret	`//// - Altera LPM ////`
27	504	lampret	`//// ////`
28			`//// To Do: ////`
29			`//// - xilinx rams need external tri-state logic ////`
30			`//// - fix avant! two-port ram ////`
31	1129	lampret	`//// - add additional RAMs ////`
32	504	lampret	`//// ////`
33			`//// Author(s): ////`
34			`//// - Damjan Lampret, lampret@opencores.org ////`
35			`//// ////`
36			`//////////////////////////////////////////////////////////////////////`
37			`//// ////`
38			`//// Copyright (C) 2000 Authors and OPENCORES.ORG ////`
39			`//// ////`
40			`//// This source file may be used and distributed without ////`
41			`//// restriction provided that this copyright statement is not ////`
42			`//// removed from the file and that any derivative work contains ////`
43			`//// the original copyright notice and the associated disclaimer. ////`
44			`//// ////`
45			`//// This source file is free software; you can redistribute it ////`
46			`//// and/or modify it under the terms of the GNU Lesser General ////`
47			`//// Public License as published by the Free Software Foundation; ////`
48			`//// either version 2.1 of the License, or (at your option) any ////`
49			`//// later version. ////`
50			`//// ////`
51			`//// This source is distributed in the hope that it will be ////`
52			`//// useful, but WITHOUT ANY WARRANTY; without even the implied ////`
53			`//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////`
54			`//// PURPOSE. See the GNU Lesser General Public License for more ////`
55			`//// details. ////`
56			`//// ////`
57			`//// You should have received a copy of the GNU Lesser General ////`
58			`//// Public License along with this source; if not, download it ////`
59			`//// from http://www.opencores.org/lgpl.shtml ////`
60			`//// ////`
61			`//////////////////////////////////////////////////////////////////////`
62			`//`
63			`// CVS Revision History`
64			`//`
65			`// $Log: not supported by cvs2svn $`
66	1267	lampret	`// Revision 1.3.4.2 2003/12/09 11:46:48 simons`
67			`// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.`
68	1200	markom	`//`
69	1267	lampret	`// Revision 1.3.4.1 2003/07/08 15:36:37 lampret`
70			`// Added embedded memory QMEM.`
71	1184	simons	`//`
72	1179	simons	`// Revision 1.3 2003/04/07 01:19:07 lampret`
73			`// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.`
74			`//`
75	1129	lampret	`// Revision 1.2 2002/10/17 20:04:40 lampret`
76			`// Added BIST scan. Special VS RAMs need to be used to implement BIST.`
77			`//`
78	1063	lampret	`// Revision 1.1 2002/01/03 08:16:15 lampret`
79			`// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.`
80			`//`
81	504	lampret	`// Revision 1.8 2001/11/02 18:57:14 lampret`
82			`// Modified virtual silicon instantiations.`
83			`//`
84			`// Revision 1.7 2001/10/21 17:57:16 lampret`
85			`// Removed params from generic_XX.v. Added translate_off/on in sprs.v and id.v. Removed spr_addr from dc.v and ic.v. Fixed CR+LF.`
86			`//`
87			`// Revision 1.6 2001/10/14 13:12:09 lampret`
88			`// MP3 version.`
89			`//`
90			`// Revision 1.1.1.1 2001/10/06 10:18:36 igorm`
91			`// no message`
92			`//`
93			`// Revision 1.1 2001/08/09 13:39:33 lampret`
94			`// Major clean-up.`
95			`//`
96			`// Revision 1.2 2001/07/30 05:38:02 lampret`
97			`// Adding empty directories required by HDL coding guidelines`
98			`//`
99			`//`
100
101			`// synopsys translate_off`
102			`include "timescale.v"
103			`// synopsys translate_on`
104			`include "or1200_defines.v"
105
106			`module or1200_spram_1024x32(`
107	1063	lampret	`ifdef OR1200_BIST
108			`// RAM BIST`
109	1200	markom	`mbist_si_i, mbist_so_o, mbist_ctrl_i,`
110	1063	lampret	`endif
111	504	lampret	`// Generic synchronous single-port RAM interface`
112			`clk, rst, ce, we, oe, addr, di, do`
113			`);`
114
115			`//`
116			`// Default address and data buses width`
117			`//`
118			`parameter aw = 10;`
119			`parameter dw = 32;`
120
121	1063	lampret	`ifdef OR1200_BIST
122	504	lampret	`//`
123	1063	lampret	`// RAM BIST`
124			`//`
125	1267	lampret	`input mbist_si_i;`
126			input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
127			`output mbist_so_o;`
128	1063	lampret	`endif
129
130			`//`
131	504	lampret	`// Generic synchronous single-port RAM interface`
132			`//`
133			`input clk; // Clock`
134			`input rst; // Reset`
135			`input ce; // Chip enable input`
136			`input we; // Write enable input`
137			`input oe; // Output enable input`
138			`input [aw-1:0] addr; // address bus inputs`
139			`input [dw-1:0] di; // input data bus`
140			`output [dw-1:0] do; // output data bus`
141
142			`//`
143			`// Internal wires and registers`
144			`//`
145
146	1184	simons	`ifdef OR1200_ARTISAN_SSP
147			`else
148			`ifdef OR1200_VIRTUALSILICON_SSP
149			`else
150	1063	lampret	`ifdef OR1200_BIST
151	1200	markom	`assign mbist_so_o = mbist_si_i;`
152	1063	lampret	`endif
153	1184	simons	`endif
154			`endif
155	504	lampret
156			`ifdef OR1200_ARTISAN_SSP
157
158			`//`
159			`// Instantiation of ASIC memory:`
160			`//`
161			`// Artisan Synchronous Single-Port RAM (ra1sh)`
162			`//`
163			`ifdef UNUSED
164	1179	simons	`art_hssp_1024x32 #(dw, 1<<aw, aw) artisan_ssp(`
165	504	lampret	`else
166	1179	simons	`ifdef OR1200_BIST
167			`art_hssp_1024x32_bist artisan_ssp(`
168			`else
169			`art_hssp_1024x32 artisan_ssp(`
170	504	lampret	`endif
171	1179	simons	`endif
172			`ifdef OR1200_BIST
173			`// RAM BIST`
174	1200	markom	`.mbist_si_i(mbist_si_i),`
175			`.mbist_so_o(mbist_so_o),`
176			`.mbist_ctrl_i(mbist_ctrl_i),`
177	1179	simons	`endif
178			`.CLK(clk),`
179			`.CEN(~ce),`
180			`.WEN(~we),`
181			`.A(addr),`
182			`.D(di),`
183			`.OEN(~oe),`
184			`.Q(do)`
185	504	lampret	`);`
186
187			`else
188
189			`ifdef OR1200_AVANT_ATP
190
191			`//`
192			`// Instantiation of ASIC memory:`
193			`//`
194			`// Avant! Asynchronous Two-Port RAM`
195			`//`
196			`avant_atp avant_atp(`
197			`.web(~we),`
198			`.reb(),`
199			`.oeb(~oe),`
200			`.rcsb(),`
201			`.wcsb(),`
202			`.ra(addr),`
203			`.wa(addr),`
204			`.di(di),`
205			`.do(do)`
206			`);`
207
208			`else
209
210			`ifdef OR1200_VIRAGE_SSP
211
212			`//`
213			`// Instantiation of ASIC memory:`
214			`//`
215			`// Virage Synchronous 1-port R/W RAM`
216			`//`
217			`virage_ssp virage_ssp(`
218			`.clk(clk),`
219			`.adr(addr),`
220			`.d(di),`
221			`.we(we),`
222			`.oe(oe),`
223			`.me(ce),`
224			`.q(do)`
225			`);`
226
227			`else
228
229			`ifdef OR1200_VIRTUALSILICON_SSP
230
231			`//`
232			`// Instantiation of ASIC memory:`
233			`//`
234			`// Virtual Silicon Single-Port Synchronous SRAM`
235			`//`
236			`ifdef UNUSED
237			`vs_hdsp_1024x32 #(1<<aw, aw-1, dw-1) vs_ssp(`
238			`else
239	1063	lampret	`ifdef OR1200_BIST
240			`vs_hdsp_1024x32_bist vs_ssp(`
241			`else
242	504	lampret	`vs_hdsp_1024x32 vs_ssp(`
243			`endif
244	1063	lampret	`endif
245			`ifdef OR1200_BIST
246			`// RAM BIST`
247	1200	markom	`.mbist_si_i(mbist_si_i),`
248			`.mbist_so_o(mbist_so_o),`
249			`.mbist_ctrl_i(mbist_ctrl_i),`
250	1063	lampret	`endif
251	504	lampret	`.CK(clk),`
252			`.ADR(addr),`
253			`.DI(di),`
254			`.WEN(~we),`
255			`.CEN(~ce),`
256			`.OEN(~oe),`
257			`.DOUT(do)`
258			`);`
259
260			`else
261
262			`ifdef OR1200_XILINX_RAMB4
263
264			`//`
265			`// Instantiation of FPGA memory:`
266			`//`
267			`// Virtex/Spartan2`
268			`//`
269
270			`//`
271			`// Block 0`
272			`//`
273			`RAMB4_S4 ramb4_s4_0(`
274			`.CLK(clk),`
275			`.RST(rst),`
276			`.ADDR(addr),`
277			`.DI(di[3:0]),`
278			`.EN(ce),`
279			`.WE(we),`
280			`.DO(do[3:0])`
281			`);`
282
283			`//`
284			`// Block 1`
285			`//`
286			`RAMB4_S4 ramb4_s4_1(`
287			`.CLK(clk),`
288			`.RST(rst),`
289			`.ADDR(addr),`
290			`.DI(di[7:4]),`
291			`.EN(ce),`
292			`.WE(we),`
293			`.DO(do[7:4])`
294			`);`
295
296			`//`
297			`// Block 2`
298			`//`
299			`RAMB4_S4 ramb4_s4_2(`
300			`.CLK(clk),`
301			`.RST(rst),`
302			`.ADDR(addr),`
303			`.DI(di[11:8]),`
304			`.EN(ce),`
305			`.WE(we),`
306			`.DO(do[11:8])`
307			`);`
308
309			`//`
310			`// Block 3`
311			`//`
312			`RAMB4_S4 ramb4_s4_3(`
313			`.CLK(clk),`
314			`.RST(rst),`
315			`.ADDR(addr),`
316			`.DI(di[15:12]),`
317			`.EN(ce),`
318			`.WE(we),`
319			`.DO(do[15:12])`
320			`);`
321
322			`//`
323			`// Block 4`
324			`//`
325			`RAMB4_S4 ramb4_s4_4(`
326			`.CLK(clk),`
327			`.RST(rst),`
328			`.ADDR(addr),`
329			`.DI(di[19:16]),`
330			`.EN(ce),`
331			`.WE(we),`
332			`.DO(do[19:16])`
333			`);`
334
335			`//`
336			`// Block 5`
337			`//`
338			`RAMB4_S4 ramb4_s4_5(`
339			`.CLK(clk),`
340			`.RST(rst),`
341			`.ADDR(addr),`
342			`.DI(di[23:20]),`
343			`.EN(ce),`
344			`.WE(we),`
345			`.DO(do[23:20])`
346			`);`
347
348			`//`
349			`// Block 6`
350			`//`
351			`RAMB4_S4 ramb4_s4_6(`
352			`.CLK(clk),`
353			`.RST(rst),`
354			`.ADDR(addr),`
355			`.DI(di[27:24]),`
356			`.EN(ce),`
357			`.WE(we),`
358			`.DO(do[27:24])`
359			`);`
360
361			`//`
362			`// Block 7`
363			`//`
364			`RAMB4_S4 ramb4_s4_7(`
365			`.CLK(clk),`
366			`.RST(rst),`
367			`.ADDR(addr),`
368			`.DI(di[31:28]),`
369			`.EN(ce),`
370			`.WE(we),`
371			`.DO(do[31:28])`
372			`);`
373
374			`else
375
376	1129	lampret	`ifdef OR1200_ALTERA_LPM
377
378	504	lampret	`//`
379	1129	lampret	`// Instantiation of FPGA memory:`
380			`//`
381			`// Altera LPM`
382			`//`
383			`// Added By Jamil Khatib`
384			`//`
385
386			`wire wr;`
387
388			`assign wr = ce & we;`
389
390			`initial $display("Using Altera LPM.");`
391
392			`lpm_ram_dq lpm_ram_dq_component (`
393			`.address(addr),`
394			`.inclock(clk),`
395			`.outclock(clk),`
396			`.data(di),`
397			`.we(wr),`
398			`.q(do)`
399			`);`
400
401			`defparam lpm_ram_dq_component.lpm_width = dw,`
402			`lpm_ram_dq_component.lpm_widthad = aw,`
403			`lpm_ram_dq_component.lpm_indata = "REGISTERED",`
404			`lpm_ram_dq_component.lpm_address_control = "REGISTERED",`
405			`lpm_ram_dq_component.lpm_outdata = "UNREGISTERED",`
406			`lpm_ram_dq_component.lpm_hint = "USE_EAB=ON";`
407			`// examplar attribute lpm_ram_dq_component NOOPT TRUE`
408
409			`else
410
411			`//`
412	504	lampret	`// Generic single-port synchronous RAM model`
413			`//`
414
415			`//`
416			`// Generic RAM's registers and wires`
417			`//`
418			`reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content`
419			`reg [dw-1:0] do_reg; // RAM data output register`
420
421			`//`
422			`// Data output drivers`
423			`//`
424	1129	lampret	`assign do = (oe) ? do_reg : {dw{1'b0}};`
425	504	lampret
426			`//`
427			`// RAM read and write`
428			`//`
429			`always @(posedge clk)`
430			`if (ce && !we)`
431			`do_reg <= #1 mem[addr];`
432			`else if (ce && we)`
433			`mem[addr] <= #1 di;`
434
435	1129	lampret	`endif // !OR1200_ALTERA_LPM
436	504	lampret	`endif // !OR1200_XILINX_RAMB4_S16
437			`endif // !OR1200_VIRTUALSILICON_SSP
438			`endif // !OR1200_VIRAGE_SSP
439			`endif // !OR1200_AVANT_ATP
440			`endif // !OR1200_ARTISAN_SSP
441
442			`endmodule`

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