Apple-1-HW/Apple1_MiST
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take ram out of apple1 module

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This commit is contained in:
nino-porcino 2021-12-30 20:07:37 +01:00
parent 2dbed93220
commit 68846df5d0
2 changed files with 35 additions and 10 deletions
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22
rtl/apple1.v
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@ -30,6 +30,12 @@ module apple1(
input uart_rx, // asynchronous serial data input from computer
output uart_tx, // asynchronous serial data output to computer
output uart_cts, // clear to send flag to computer
// RAM interface
output [15:0] ram_addr,
output [7:0] ram_din,
input [7:0] ram_dout,
output ram_rd,
output ram_wr,
// I/O interface to keyboard
input ps2_clk, // PS/2 keyboard serial clock input
@ -43,6 +49,12 @@ module apple1(
output vga_blu, // blue VGA signal
input vga_cls // clear screen button
);
assign ram_addr = addr;
assign ram_din = cpu_dout;
assign ram_rd = ram_cs;
assign ram_wr = we & ram_cs;
//////////////////////////////////////////////////////////////////////////
// Registers and Wires
@ -102,16 +114,6 @@ module apple1(
//////////////////////////////////////////////////////////////////////////
// RAM and ROM
// RAM
wire [7:0] ram_dout;
ram ram(
.clk(clk14),
.address(addr[12:0]),
.w_en(we & ram_cs),
.din(cpu_dout),
.dout(ram_dout)
);
// WozMon ROM
wire [7:0] rom_dout;
rom_wozmon rom_wozmon(

23
rtl/apple1_mist.sv
View File

@ -126,6 +126,22 @@ pll pll
/******************************************************************************************/
/******************************************************************************************/
// RAM
wire [7:0] ram_dout;
ram ram(
.clk(clk14),
.address(cpu_addr[12:0]),
.w_en(cpu_wr),
.din(cpu_dout),
.dout(ram_dout)
);
// ram interface
wire [15:0] cpu_addr;
wire [7:0] cpu_dout;
wire cpu_rd;
wire cpu_wr;
apple1 apple1
(
.clk14(clk14),
@ -135,6 +151,13 @@ apple1 apple1
.uart_tx(), // uart not connected
.uart_cts(), // uart not connected
// RAM interface
.ram_addr (cpu_addr),
.ram_din (cpu_dout),
.ram_dout (ram_dout),
.ram_rd (cpu_rd),
.ram_wr (cpu_wr),
.ps2_clk(ps2_kbd_clk),
.ps2_din(ps2_kbd_data),