From 3c16d5d7bd5b3a6ad2c70a821c73e9aacf75f217 Mon Sep 17 00:00:00 2001
From: attilavs2 <whahou072@icloud.com>
Date: Sun, 26 Jan 2025 12:08:44 +0100
Subject: [PATCH] =?UTF-8?q?Progr=C3=A8s?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .gitignore         |   1 +
 interpr/a.out      | Bin 16336 -> 16504 bytes
 interpr/src/main.c | 119 +++++++++++++++++++--------------------------
 interpr/test.bin   | Bin 0 -> 570 bytes
 spec.txt           |  24 ++++++---
 5 files changed, 68 insertions(+), 76 deletions(-)
 create mode 100644 .gitignore
 create mode 100644 interpr/test.bin

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f47cb20
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.out
diff --git a/interpr/a.out b/interpr/a.out
index fb0e5df22c661149fbd6ba2bd0d407bf56e550ac..e95aaaac1d1843dd64535aafa69f111986750eca 100755
GIT binary patch
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diff --git a/interpr/src/main.c b/interpr/src/main.c
index 161e81c..f0924b7 100644
--- a/interpr/src/main.c
+++ b/interpr/src/main.c
@@ -2,37 +2,27 @@
 #include <stdio.h>
 #include <stdint.h>
 #include <string.h>
+#include <stdbool.h>
 
 #define MEM_ALLOC 0xFFFF //64KiB
 
 #define TOTAL_ALLOC (MEM_ALLOC)
 
-#define BOOTCODE_S 18
-
-uint8_t bootcode[] = {
-  0x00,0xFF,
-  0xFF,0x00,
-  0x00,0x06,
-  0x72,0x00,
-  0xB6,0xE0,
-  0xE0,0x0E,
-  0xB6,0xE0,
-  0xE0,0x1E,
-  0x34,0x00
-};
-
 typedef struct{
 
   uint8_t *mem;
 
   uint8_t greg[16];
 
-  uint16_t sreg[2];
+  union {
+    uint16_t sreg[2];
+    uint8_t sreg_b[4];
+  }; 
 
   uint8_t interr[16];
   uint8_t intern;
 
-  uint8_t interen;
+  bool interen;
 
   uint8_t tbit;
 
@@ -47,16 +37,9 @@ int init_proc(ProcDat *procdat){
     return 1;
   }
 
-  for(int i=0; i<BOOTCODE_S; i++){
-    procdat->mem[i] = bootcode[i-1];
-  }
-  for(int i=BOOTCODE_S; i<MEM_ALLOC; i++){
-    procdat->mem[i] = 1;
-  }
+  memset(procdat->mem, 0x1, MEM_ALLOC);
 
-  procdat->sreg[1] = procdat->mem[0]<<8 + procdat->mem[1];
-  printf("%x\n", procdat->mem[1]);
-  procdat->interen = 1;
+  procdat->interen = true;
   procdat->interr[0] = 0b01;
   procdat->intern = 1;
   procdat->cycles = 0;
@@ -68,36 +51,62 @@ void free_proc(ProcDat *procdat){
   free(procdat->mem);
 }
 
+int load_bin(ProcDat *procdat, char *filename){
+  FILE *file = fopen(filename, "r");
+  
+  if(!fgets(procdat->mem, MEM_ALLOC, file)){
+    fclose(file);
+    return 1;
+  }
+  
+  procdat->sreg[1] = 0x28;
+  
+  fclose(file);
+  
+  return 0;
+}
+
 void itp(uint8_t interrupt, uint8_t call_type, ProcDat *procdat){
-  if(!procdat->interen)return;
-  if(!(procdat->interr[interrupt] & 0x2) && call_type) return;
+  if(!procdat->interen)
+    return;
+  if(!(procdat->interr[interrupt] & 0x2) && call_type)
+    return;
 
   printf("Interrupt %x, PC : %x\n", interrupt, procdat->sreg[1]);
 
-  uint16_t st = procdat->mem[0x2]<<8 + procdat->mem[0x3];
+  uint16_t st = (procdat->mem[0x2]<<8) + procdat->mem[0x3];
 
   procdat->mem[st+procdat->greg[12]] = procdat->sreg[1] >> 8;
   procdat->greg[12]++;
   procdat->mem[st+procdat->greg[12]] = procdat->sreg[1] & 0xFF;
   procdat->greg[12]++;
 
-  procdat->sreg[1] = procdat->mem[3]<<8 + procdat->mem[4];
+  procdat->sreg[1] = (procdat->mem[3]<<8) + procdat->mem[4];
 }
 
-int exec_instr(uint16_t instr, ProcDat *procdat){
-  int8_t in0 = instr & 0xFF;
+int exec_instr(ProcDat *procdat){
+  uint16_t addr = procdat->sreg[1];
+  uint16_t instr = procdat->mem[addr]<<8 | procdat->mem[addr+1];
+  int16_t in0 = (int8_t)(instr & 0xFF);
   uint8_t in1 = instr & 0xF;
   uint8_t in2 = (instr>>4) & 0xF;
   uint8_t in3 = (instr>>8) & 0xF;
   uint8_t in4 = instr>>12;
 
-  uint8_t *greg = &procdat->greg;
-  uint16_t *sreg = &procdat->sreg;
+  uint8_t *greg = procdat->greg;
+  uint16_t *sreg = procdat->sreg;
+  uint8_t *sreg_b = procdat->sreg_b;
   uint8_t *mem = procdat->mem;
   uint16_t st = mem[0x2]<<8 + mem[0x3];
   int32_t cycles = 0;
 
+  printf("Executing %x : %x \n", sreg[1], instr);
+
   switch(in4){
+    case 0x0 : {
+      cycles++;
+      break;
+    }
     case 0x2 : {
       greg[in2] = greg[in1];
       cycles++;
@@ -106,6 +115,7 @@ int exec_instr(uint16_t instr, ProcDat *procdat){
     case 0x3 : {
       switch(in3){
         case 0x0 : {
+          printf("br to : %x\n", sreg[1]+in0*2);
           sreg[1] += in0*2;
           cycles++;
           break;
@@ -130,6 +140,7 @@ int exec_instr(uint16_t instr, ProcDat *procdat){
           break;
         }
         case 0x4 : {
+          printf("jmp to : %x\n", sreg[0]);
           sreg[1] = sreg[0];
           cycles+=2;
           break;
@@ -335,7 +346,7 @@ int exec_instr(uint16_t instr, ProcDat *procdat){
       switch(in3){
         case 0x0 : {
           if(in2 < 2){
-            sreg[1] = (sreg[1] & (0x00FF00>>(8*in2))) + greg[in1]<<(8*in2);
+            sreg_b[in2] = greg[in1];
           }
           cycles++;
           break;
@@ -367,11 +378,10 @@ int exec_instr(uint16_t instr, ProcDat *procdat){
   if(mem[sreg[1]] == 1){
     return 0;
   }
-  if(mem[sreg[1]])
   return 1;
 }
 
-int main(){
+int main(int argc, char *argv[]){
 
   ProcDat procdat;
 
@@ -381,40 +391,13 @@ int main(){
     return 1;
   }
 
-  char *buf = malloc(100);
-
-  while(1){
-    int inp = 0;
-    int i;
-
-    scanf("%X", &inp);
-    if(inp == 0x1){
-      scanf("%99s", buf);
-      if(!memcmp(buf, "-d", 2)){
-        printf("PC : %x AC : %x\n", procdat.sreg[1], procdat.sreg[0]);
-        for(i=0; i<16; i++){
-          printf("r%d : %x\n", i, procdat.greg[i]);
-        }
-        for(i=0; i<MEM_ALLOC;){
-          printf("%x : ", i);
-          i++;
-          printf("%x ",procdat.mem[i]);
-          i++;
-          printf("%x\n",procdat.mem[i]);
-        }
-      }
-      if(!memcmp(buf, "-q", 2)){
-        break;
-      }
-    }
-    else{
-      if(exec_instr(inp & 0xFFFF, &procdat)){
-        while(exec_instr(procdat.mem[procdat.sreg[1]], &procdat)){}
-      }
-    }
+  if(argc < 2 || load_bin(&procdat, argv[1])){
+    printf("No file provided or failed to load file !\n");
+    return 1;
   }
-exit:
 
+  while(exec_instr(&procdat)){}
+  
   free_proc(&procdat);
 
   return 0;
diff --git a/interpr/test.bin b/interpr/test.bin
new file mode 100644
index 0000000000000000000000000000000000000000..cbf59df0950390918894db2a99d29e0f72fe873a
GIT binary patch
literal 570
fcmZS3_|L$g!7vI&Lx89dXkcj6cp&hA(S!j2{ObgM

literal 0
HcmV?d00001

diff --git a/spec.txt b/spec.txt
index af104f0..f1024f7 100644
--- a/spec.txt
+++ b/spec.txt
@@ -24,7 +24,7 @@ registers:
     interrupt register,
     contains the type of
     interrupt
-    4bits - bits 0-3 will always be 0
+    3bits - bits 0-4 will always be 0
   t bit:
     is set by comp ops
     1bit
@@ -39,10 +39,13 @@ calling conventions:
 Interrupts:
   Hardware interrupts:
     0x0 : Invalid instruction
-  The 15 other interrupts are free to
+  The 7 other interrupts are free to
   define by the user
-  On interrupt (either called through
-  the bus or itp)
+  On interrupt, the CPU will jump to the
+  handler base + interrupt number * 256
+  When an interrupt is raised, the cpu will push the resume adress to stack (in
+  order pc0 then pc1)
+
 startup:
   the cpu will look
   at adress 0x0,and
@@ -62,9 +65,14 @@ startup:
      adress will be
      read here 
      everytime
-  When an interrupt is raised, the cpu will allow acces
-  to r12-15 and push the resume adress to stack (in
-  order pc0 then pc1)
+
+soc :
+  The emulator implements a couple of features to be interseting.
+  - Keyboard handler
+  - "Serial" (stdout) output
+
+  keyboard:
+    
  
 instructions :
   format:
@@ -238,7 +246,7 @@ instructions :
     0b01100100mmmmnnn
     0x64mn
     Greater Than (Signed):
-    t    <- rm     > rn     ? 1:0
+    t <- rm > rn ? 1:0
             (signed) (signed)
     1 clock
   eql rm,rn: