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Code Issues Releases Wiki Activity

[C16] Add Load Kernal option

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This commit is contained in:
Gyorgy Szombathelyi
2019-02-14 19:49:41 +01:00
parent 2529968f18
commit 214136a723
1 changed files with 6 additions and 5 deletions
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11
cores/c16/c16_mist.v
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@@ -71,13 +71,14 @@ module c16_mist (
parameter CONF_STR = {
"C16;PRG;",
"S,D64,Mount Disk;",
"F,ROM,Load Kernal;",
"O2,Scanlines,Off,On;",
"O3,Joysticks,Normal,Swapped;",
"O4,Memory,64k,16k;",
"T5,Reset;"
};
parameter CONF_STR_LEN = 8+17+20+28+18+9;
parameter CONF_STR_LEN = 8+17+18+20+28+18+9;
// the status register is controlled by the on screen display (OSD)
wire [7:0] status;
@@ -276,7 +277,7 @@ wire [7:0] ioctl_data;
wire [4:0] ioctl_index;
wire ioctl_downloading;
wire rom_download = ioctl_downloading && (ioctl_index == 5'd0);
wire rom_download = ioctl_downloading && ((ioctl_index == 5'd0) || (ioctl_index == 5'd3));
wire prg_download = ioctl_downloading && (ioctl_index == 5'd1);
// halt cpu when it's done with the current cycle
@@ -510,9 +511,9 @@ always @(negedge clk28) begin
if(ioctl_rom_wr && !last_ioctl_rom_wr) begin
rom_dl_data <= ioctl_data;
rom_dl_addr <= ioctl_addr[13:0];
c1541_dl_wr <= !ioctl_addr[15:14];
kernal_dl_wr <= ioctl_addr[15:14] == 2'd1;
basic_dl_wr <= ioctl_addr[15:14] == 2'd2;
c1541_dl_wr <= !ioctl_addr[15:14] && ioctl_index == 5'd0;
kernal_dl_wr <= ioctl_addr[15:14] == 2'd1 || ioctl_index == 5'd3;
basic_dl_wr <= ioctl_addr[15:14] == 2'd2 && ioctl_index == 5'd0;
end else
{ kernal_dl_wr, basic_dl_wr, c1541_dl_wr } <= 0;
end