From 9ebec735c488e2f7ac29933fb51b4e6e65c7b93f Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Fri, 5 Dec 2008 00:37:26 +0000
Subject: Initial working version of memory snapshots

---
 source/zx81.c | 106 +++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 61 insertions(+), 45 deletions(-)

(limited to 'source/zx81.c')

diff --git a/source/zx81.c b/source/zx81.c
index a8620c3..00d6015 100644
--- a/source/zx81.c
+++ b/source/zx81.c
@@ -226,40 +226,28 @@ static void RomPatch(void)
 
 static Z80Byte FromASCII(char c)
 {
-    switch(c)
-    {
-	case '\'':
-	case '"':
-	    return 11;
-
-	case '(':
-	    return 16;
-
-	case ')':
-	    return 17;
+    static const char *charset =
+      /* 0123456789 */
+    	" _________"
+	"_\"#$:?()><"
+	"=+-*/:,.01"
+	"23456789ab"
+	"cdefghijkl"
+	"mnopqrstuv"
+	"wxyz";
 
-    	case '-':
-	    return 22;
-
-	case '*':
-	    return 23;
+    int f;
 
-	case ',':
-	    return 26;
+    c = tolower(c);
 
-	case '.':
-	    return 27;
+    for(f = 0; charset[f]; f++)
+    {
+    	if (charset[f] == c)
+	{
+	    return f;
+	}
     }
 
-    if (c>='0' && c<='9')
-	return (c-'0')+28;
-
-    if (c>='a' && c<='z')
-    	return (c-'a')+38;
-
-    if (c>='A' && c<='Z')
-    	return (c-'A')+38;
-
     return 0;
 }
 
@@ -1028,6 +1016,10 @@ void ZX81SuspendDisplay(void)
 void ZX81ResumeDisplay(void)
 {
     ClearText();
+
+    /* Reset last_I to force hi/lo res detection
+    */
+    last_I = 0;
 }
 
 
@@ -1081,27 +1073,51 @@ void ZX81Reconfigure(void)
 
 void ZX81SaveSnapshot(FILE *fp)
 {
-    STRPUT(fp, mem);
-    STRPUT(fp, matrix);
-    STRPUT(fp, waitkey);
-    STRPUT(fp, started);
-    STRPUT(fp, RAMBOT);
-    STRPUT(fp, RAMTOP);
-    STRPUT(fp, prev_lk1);
-    STRPUT(fp, prev_lk2);
+    int f;
+
+    for(f=0; f<sizeof mem; f++)
+    {
+	PUT_Byte(fp, mem[f]);
+    }
+
+    for(f=0; f<sizeof matrix; f++)
+    {
+	PUT_Byte(fp, matrix[f]);
+    }
+
+    PUT_Long(fp, waitkey);
+    PUT_Long(fp, started);
+
+    PUT_ULong(fp, RAMBOT);
+    PUT_ULong(fp, RAMTOP);
+
+    PUT_ULong(fp, prev_lk1);
+    PUT_ULong(fp, prev_lk2);
 }
 
 
 void ZX81LoadSnapshot(FILE *fp)
 {
-    STRGET(fp, mem);
-    STRGET(fp, matrix);
-    STRGET(fp, waitkey);
-    STRGET(fp, started);
-    STRGET(fp, RAMBOT);
-    STRGET(fp, RAMTOP);
-    STRGET(fp, prev_lk1);
-    STRGET(fp, prev_lk2);
+    int f;
+
+    for(f=0; f<sizeof mem; f++)
+    {
+	mem[f] = GET_Byte(fp);
+    }
+
+    for(f=0; f<sizeof matrix; f++)
+    {
+	matrix[f] = GET_Byte(fp);
+    }
+
+    waitkey = GET_Long(fp);
+    started = GET_Long(fp);
+
+    RAMBOT = GET_ULong(fp);
+    RAMTOP = GET_ULong(fp);
+
+    prev_lk1 = GET_ULong(fp);
+    prev_lk2 = GET_ULong(fp);
 
     /* Reset last_I to force hi/lo res detection
     */
-- 
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