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Qbert: fix NVRAM init ROM corruption

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This commit is contained in:
Gyorgy Szombathelyi 2022-01-30 02:37:50 +01:00
parent 055a6e0f71
commit b3544f6d1d
1 changed files with 5 additions and 5 deletions
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10
Arcade_MiST/Gottlieb Qbert/rtl/Qbert_MiST.sv
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@ -373,11 +373,11 @@ sdram #(80) sdram(
.port1_ack ( ),
.port1_a ( ioctl_addr[23:1] ),
.port1_ds ( {ioctl_addr[0], ~ioctl_addr[0]} ),
.port1_we ( ioctl_downl ),
.port1_we ( rom_init ),
.port1_d ( {ioctl_dout, ioctl_dout} ),
.port1_q ( ),
.cpu1_addr ( ioctl_downl ? 16'hffff : {1'b0, main_rom_addr[15:1]} ),
.cpu1_addr ( rom_init ? 16'hffff : {1'b0, main_rom_addr[15:1]} ),
.cpu1_q ( main_rom_do ),
.cpu2_addr ( 16'hffff ),
.cpu2_q ( ),
@ -387,11 +387,11 @@ sdram #(80) sdram(
.port2_ack ( ),
.port2_a ( {bg_ioctl_addr[13:0], bg_ioctl_addr[15]} ), // merge fg roms to 32-bit wide words
.port2_ds ( {bg_ioctl_addr[14], ~bg_ioctl_addr[14]} ),
.port2_we ( ioctl_downl ),
.port2_we ( rom_init ),
.port2_d ( {ioctl_dout, ioctl_dout} ),
.port2_q ( ),
.sp_addr ( ioctl_downl ? 14'h3fff : bg_addr ),
.sp_addr ( rom_init ? 14'h3fff : bg_addr ),
.sp_q ( bg_do )
);
@ -400,7 +400,7 @@ always @(posedge clk_sys) begin
reg ioctl_wr_last = 0;
ioctl_wr_last <= ioctl_wr;
if (ioctl_downl) begin
if (rom_init) begin
if (~ioctl_wr_last && ioctl_wr) begin
port1_req <= ~port1_req;
port2_req <= ~port2_req;