uzix/zx-multisound
1
0
Fork 0
mirror of https://github.com/UzixLS/zx-multisound.git synced 2025-07-18 23:01:31 +03:00
Code Issues Packages Projects Releases Wiki Activity

cpld: add build option to support 2mb gs ram

Browse Source
This commit is contained in:
Eugene Lozovoy
2023-02-03 20:48:37 +03:00
parent 4fe3fd7606
commit 884f8308b0
3 changed files with 19 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
cpld/rtl/top.v
View File

@ -45,6 +45,8 @@ module zx_multisound(
output n_grom,
output n_gram1,
output n_gram2,
output n_gram3,
output n_gram4,
output [18:15] gma,
output dac0_out,
@ -193,7 +195,7 @@ end
/* GS INTERNAL REGISTERS */
reg [7:0] gs_reg00, gs_reg_out;
wire [5:0] gs_page = gs_reg00[5:0];
wire [6:0] gs_page = gs_reg00[6:0];
always @(posedge clk32 or negedge rst_n) begin
if (!rst_n) begin
gs_reg00 <= 0;
@ -255,8 +257,17 @@ end
/* GS BUS CONTROLLER */
assign n_grom = (~n_gmreq && ((ga[15:14] == 2'b00) || (ga[15] && gs_page == 0)))? 1'b0 : 1'b1;
`ifdef GS_RAM_2MB
assign n_gram1 = (~n_gmreq && n_grom && ((gs_page[5:4] == 2'd0) || ~ga[15]))? 1'b0 : 1'b1;
assign n_gram2 = (~n_gmreq && n_grom && (gs_page[5:4] == 2'd1) && ga[15] )? 1'b0 : 1'b1;
assign n_gram3 = (~n_gmreq && n_grom && (gs_page[5:4] == 2'd2) && ga[15] )? 1'b0 : 1'b1;
assign n_gram4 = (~n_gmreq && n_grom && (gs_page[5:4] == 2'd3) && ga[15] )? 1'b0 : 1'b1;
`else
assign n_gram1 = (~n_gmreq && n_grom && (~gs_page[4] || ~ga[15]))? 1'b0 : 1'b1;
assign n_gram2 = (~n_gmreq && n_grom && gs_page[4] && ga[15] )? 1'b0 : 1'b1;
assign n_gram3 = 1'b1;
assign n_gram4 = 1'b1;
`endif
assign gma = (ga[15] == 1'b0)? 4'b0001 : gs_page[3:0];
assign gd =
(~n_giorq && ~n_grd && ga[3:0] == 4'h4)? gs_status :

4
cpld/syn/rev_A.qsf
View File

@ -103,6 +103,9 @@ set_location_assignment PIN_60 -to dac3_out
set_location_assignment PIN_61 -to dac2_out
set_location_assignment PIN_62 -to dac1_out
set_location_assignment PIN_63 -to dac0_out
set_location_assignment PIN_70 -to n_gram4
set_location_assignment PIN_71 -to n_gram3
set_location_assignment PIN_72 -to n_mreq
set_location_assignment PIN_74 -to fm1_ena
set_location_assignment PIN_75 -to ym_m
set_location_assignment PIN_78 -to aa0
@ -158,7 +161,6 @@ set_location_assignment PIN_140 -to a[8]
set_location_assignment PIN_141 -to a[9]
set_location_assignment PIN_142 -to a[10]
set_location_assignment PIN_143 -to a[11]
set_location_assignment PIN_72 -to n_mreq
set_global_assignment -name MAX7000_OPTIMIZATION_TECHNIQUE BALANCED
set_global_assignment -name PRE_MAPPING_RESYNTHESIS OFF
set_global_assignment -name OPTIMIZE_HOLD_TIMING OFF

2
cpld/syn/rev_A1.qsf
View File

@ -55,6 +55,7 @@ set_global_assignment -name MAX7000_DEVICE_IO_STANDARD "3.3-V LVTTL"
set_global_assignment -name SAVE_DISK_SPACE OFF
set_global_assignment -name TIMEQUEST_MULTICORNER_ANALYSIS OFF
set_global_assignment -name SYNTH_TIMING_DRIVEN_SYNTHESIS OFF
set_location_assignment PIN_1 -to n_gram4
set_location_assignment PIN_2 -to n_gram2
set_location_assignment PIN_5 -to gma[17]
set_location_assignment PIN_6 -to gma[16]
@ -159,6 +160,7 @@ set_location_assignment PIN_139 -to a[8]
set_location_assignment PIN_140 -to a[9]
set_location_assignment PIN_141 -to a[10]
set_location_assignment PIN_142 -to a[11]
set_location_assignment PIN_143 -to n_gram3
set_global_assignment -name MAX7000_OPTIMIZATION_TECHNIQUE BALANCED
set_global_assignment -name PRE_MAPPING_RESYNTHESIS OFF
set_global_assignment -name OPTIMIZE_HOLD_TIMING OFF