Firmware: Added ihex command stub

Change-Id: Ia85cbb197c168448f2874d15883176d1f4654a1c

firmware/AtomBusMon.c

@@ -14,7 +14,7 @@
  * VERSION and NAME are used in the start-up message
  ********************************************************/
 
-#define VERSION "0.981"
+#define VERSION "0.981 (custom for Bram)"
 
 #if defined(CPU_Z80)
   #define NAME "ICE-Z80"
@@ -70,6 +70,7 @@ char *cmdStrings[] = {
   "load",
   "save",
   "srec",
+  "ihex",
   "special",
   "reset",
   "trace",
@@ -123,6 +124,7 @@ void (*cmdFuncs[])(char *params) = {
   doCmdLoad,
   doCmdSave,
   doCmdSRec,
+  doCmdIHex,
   doCmdSpecial,
   doCmdReset,
   doCmdTrace,
@@ -190,50 +192,51 @@ static const uint8_t helpMeta[] PROGMEM = {
 #endif
   17, 15, // help
    9,  8, // continue
-  24,  7, // next
+  25,  7, // next
-  32,  6, // step
+  33,  6, // step
-  27,  7, // regs
+  28,  7, // regs
   12, 10, // dis
   16,  7, // flush
   13, 11, // fill
   11,  9, // crc
   10, 13, // copy
    8, 13, // compare
-  22,  1, // mem
+  23,  1, // mem
-  26,  2, // rd
+  27,  2, // rd
-  41,  3, // wr
+  42,  3, // wr
 #if defined(CPU_Z80)
-  20,  1, // io
+  21,  1, // io
-  19,  2, // in
+  20,  2, // in
-  25,  3, // out
+  26,  3, // out
 #endif
 #if defined(CPU_6502) || defined(CPU_65C02)
   14,  0, // go
   15, 16, // exec
-  23, 14, // mode
+  24, 14, // mode
 #endif
-  33, 12, // test
+  34, 12, // test
-  21,  0, // load
+  22,  0, // load
-  29,  9, // save
+  30,  9, // save
-  31,  7, // srec
+  32,  7, // srec
-  30, 14, // special
+  19,  7, // ihex
-  28,  7, // reset
+  31, 14, // special
-  34,  6, // trace
+  29,  7, // reset
+  35,  6, // trace
    1,  7, // blist
    6,  4, // breakx
-  40,  4, // watchx
+  41,  4, // watchx
    4,  4, // breakr
-  38,  4, // watchr
+  39,  4, // watchr
    5,  4, // breakw
-  39,  4, // watchw
+  40,  4, // watchw
 #if defined(CPU_Z80)
    2,  4, // breaki
-  36,  4, // watchi
+  37,  4, // watchi
    3,  4, // breako
-  37,  4, // watcho
+  38,  4, // watcho
 #endif
    7,  0, // clear
-  35,  5, // trigger
+  36,  5, // trigger
    0,  0
 };
 
@@ -1972,6 +1975,10 @@ void doCmdSRec(char *params) {
   }
 }
 
+void doCmdIHex(char *params) {
+   logstr("TODO: implement intel hex command\n");
+}
+
 void logSpecial(char *function, uint8_t value) {
   logs(function);
   if (value) {

firmware/AtomBusMon.h

@@ -62,6 +62,7 @@ void doCmdHelp(char *params);
 void doCmdHistory(char *params);
 void helpForCommand(uint8_t i);
 #endif
+void doCmdIHex(char *params);
 void doCmdIO(char *params);
 void doCmdList(char *params);
 void doCmdLoad(char *params);

src/MOS6502CpuMonALS.vhd

@@ -104,8 +104,26 @@ architecture behavioral of MOS6502CpuMonALS is
     signal led_trig0    : std_logic;
     signal led_trig1    : std_logic;
 
+
+    signal int_Phi0_div : unsigned(4 downto 0); -- internal Phi0 clock divider
+    signal int_Phi0     : std_logic;            -- internal Phi0 clock
+
 begin
 
+    -- Hack to use an internal 1MHz clock instead of Phi0
+    -- from the 50MHz clock on the EEPIZZA board
+    process(clock)
+    begin
+        if rising_edge(clock) then
+            if int_Phi0_div = 24 then
+                int_Phi0 <= not int_Phi0; -- toggle int_Phi2 every 25 cycles
+                int_Phi0_div <= (others => '0');
+            else
+                int_Phi0_div <= int_Phi0_div + 1;
+            end if;
+        end if;
+    end process;
+
     sw_reset_cpu <= not sw1;
     sw_reset_avr <= not sw2;
     led1         <= led_bkpt;
@@ -126,7 +144,7 @@ begin
             clock             => clock,
 
             -- 6502 Signals
-            Phi0              => PhiIn,
+            Phi0              => int_Phi0, -- hack to use internal Phi0
             Phi1              => Phi1Out,
             Phi2              => Phi2Out,
             IRQ_n             => IRQ_n,
@@ -175,7 +193,7 @@ begin
     OERW_n <= not (BE);
     OEAH_n <= not (BE);
     OEAL_n <= not (BE);
-    OED_n  <= not (BE and PhiIn); -- TODO: might need to use a slightly delayed version of Phi2 here
+    OED_n  <= not (BE and int_Phi0); -- hack to use interal Phi0
     DIRD   <= R_W_n_int;
 
 end behavioral;