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fix V1.2 TB

This commit is contained in:
Romain Dolbeau 2022-11-01 14:37:20 +01:00
parent b7a941e61b
commit d52bda7883
3 changed files with 40 additions and 18 deletions
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34
nubus-to-ztex-gateware/slave_V1.2_tb.sv
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@ -48,12 +48,11 @@ module nubus_slave_tb ();
tri1 [1:0] leds;
tri unused0, tmoen, unused1, unused2;
tri arbcy_n;
tri grant;
tri unused0, unused1, unused2;
tri nubus_oe, nubus_ad_dir;
tri reset_n_3v3, clk_n_3v3, tm0_n_3v3, tm1_n_3v3, start_n_3v3, ack_n_3v3, rqst_n_3v3;
tri [3:0] id_n_3v3;
tri [3:0] arb_n_3v3;
tri [31:0] ad_n_3v3;
tri [3:0] arb_o_n;
tri tm0_o_n, tm1_o_n, tmx_oe_n;
@ -88,10 +87,10 @@ module nubus_slave_tb ();
.nubus_oe(nubus_oe),
.nubus_ad_dir(nubus_ad_dir));
tri1 nmrq_3v3_n;
tri1 nmrq_n_3v3;
sn74lvt145_quarter driver_u1a(.oe_n(nmrq_3v3_n),
sn74lvt145_quarter driver_u1a(.oe_n(nmrq_n_3v3),
.in(0),
.out(nub_nmrqn));
sn74lvt145_quarter driver_u1b(.oe_n(rqst_o_n),
@ -126,15 +125,20 @@ module nubus_slave_tb ();
sn74lvt145_quarter driver_u2c(.oe_n(tm2_oe_n),
.in(tm2_o_n),
.out(nub_tm2n));
sn74cb3t3125 shifters_u4(.oe_n('h0),
.A({start_n_3v3, ack_n_3v3, clk_n_3v3, rqst_n_3v3 }),
.B({nub_startn, nub_ackn, nub_clkn, nub_rqstn }));
sn74cb3t3125 shifters_u13(.oe_n('h0),
.A({reset_n_3v3, tm2_n_3v3, tm0_n_3v3, tm1_n_3v3}),
.B({nub_resetn, nub_tm2n, nub_tm0n, nub_tm1n }));
assign clk2x_n_3v3 = nub_clk2xn;
tri1 [2:0] u13_throwaway;
tri1 [2:0] u13_zero;
sn74cb3t3245 shifters_u13(.oe_n('h0),
.A({clk2x_n_3v3, clk_n_3v3, start_n_3v3, ack_n_3v3, rqst_n_3v3, u13_throwaway}),
.B({nub_clk2xn, nub_clkn, nub_startn, nub_ackn, nub_rqstn, u13_zero}));
sn74cb3t3245 shifters_u14(.oe_n('h0),
.A({id_n_3v3, arb_n_3v3 }),
.B({nub_idn, nub_arbn }));
tri1 [3:0] u15_throwaway;
tri1 [3:0] u15_zero;
sn74cb3t3245 shifters_u15(.oe_n('h0),
.A({ reset_n_3v3, tm2_n_3v3, tm0_n_3v3, tm1_n_3v3, u15_throwaway }),
.B({ nub_resetn, nub_tm2n, nub_tm0n, nub_tm1n, u15_zero }));
ztex213_nubus_V1_2 UNuBus (
// NuBus lines only
@ -156,10 +160,10 @@ module nubus_slave_tb ();
.rqst_3v3_n(rqst_n_3v3),
.rqst_o_n(rqst_o_n),
.nmrq_3v3_n(nmrq_n_3v3), // output only, direct to driver
.ack_3v3_n(ack_3v3_n),
.ack_3v3_n(ack_n_3v3),
.ack_o_n(ack_o_n),
.ack_oe_n(ack_oe_n),
.arb_3v3_n(arb_3v3_n),
.arb_3v3_n(arb_n_3v3),
.arb_o_n(arb_o_n),
.nubus_ad_dir(nubus_ad_dir),
.nubus_oe(nubus_oe),

6
nubus-to-ztex-gateware/sn74cb3t3125.v
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@ -1,14 +1,14 @@
module sn74cb3t3125
(
input [3:0] oe_n,
inout [3:0] A,
output [3:0] A,
input [3:0] B
);
/*
wire [3:0] tA;
wire [3:0] tB;
/*
assign A[0] = oe_n[0] ? 'bZ : tA[0];
assign A[1] = oe_n[1] ? 'bZ : tA[1];
assign A[2] = oe_n[2] ? 'bZ : tA[2];
@ -30,7 +30,7 @@ module sn74cb3t3125
assign A[0] = oe_n[0] ? 'bZ : B[0];
assign A[1] = oe_n[1] ? 'bZ : B[1];
assign A[3] = oe_n[2] ? 'bZ : B[2];
assign A[2] = oe_n[2] ? 'bZ : B[2];
assign A[3] = oe_n[3] ? 'bZ : B[3];

18
nubus-to-ztex-gateware/sn74cb3t3245.v Normal file
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@ -0,0 +1,18 @@
module sn74cb3t3245
(
input oe_n,
output [7:0] A,
input [7:0] B
);
assign A[0] = oe_n ? 'bZ : B[0];
assign A[1] = oe_n ? 'bZ : B[1];
assign A[2] = oe_n ? 'bZ : B[2];
assign A[3] = oe_n ? 'bZ : B[3];
assign A[4] = oe_n ? 'bZ : B[4];
assign A[5] = oe_n ? 'bZ : B[5];
assign A[6] = oe_n ? 'bZ : B[6];
assign A[7] = oe_n ? 'bZ : B[7];
endmodule // sn74cb3t3125