docs: update to load graphics image

mode7_demo/docs/dram_notes.tex

@@ -6,6 +6,23 @@
 
 \newcommand*\rot{\rotatebox{90}}
 
+\definecolor{color0}{rgb}{0.000,0.000,0.000}	% Black
+\definecolor{color1}{rgb}{0.890,0.118,0.376}	% Magenta
+\definecolor{color2}{rgb}{0.376,0.306,0.741}	% Dark Blue
+\definecolor{color3}{rgb}{1.000,0.267,0.992}	% Purple
+\definecolor{color4}{rgb}{0.000,0.638,0.376}	% Dark Green
+\definecolor{color5}{rgb}{0.612,0.612,0.612}	% Grey 1
+\definecolor{color6}{rgb}{0.078,0.812,0.992}	% Medium Blue
+\definecolor{color7}{rgb}{0.816,0.765,1.000}	% Light Blue
+\definecolor{color8}{rgb}{0.376,0.447,0.012}	% Brown
+\definecolor{color9}{rgb}{1.000,0.416,0.235}	% Orange
+\definecolor{color10}{rgb}{0.616,0.616,0.616}	% Grey 2
+\definecolor{color11}{rgb}{1.000,0.627,0.816}	% Pink
+\definecolor{color12}{rgb}{0.078,0.961,0.235}	% Bright Green
+\definecolor{color13}{rgb}{0.816,0.867,0.553}	% Yellow
+\definecolor{color14}{rgb}{0.447,1.000,0.816}	% Aqua
+\definecolor{color15}{rgb}{1.000,1.000,1.000}	% White
+
 \begin{document}
 
 Sort of similar to how the Raspberry Pi started out as a GPU with a small

mode7_demo/docs/make_table.c

@@ -1,4 +1,7 @@
 #include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
 
 #define COLUMNS 40
 #define ROWS 48
@@ -9,24 +12,61 @@ static short addresses[]={
 	0x450,0x4d0,0x550,0x5d0,0x650,0x6d0,0x750,0x7d0,
 };
 
+static unsigned char image[1024];
+
+static int color(int i,int j) {
+
+	int x,y,c;
+
+	y=addresses[j/2]-0x400;
+	x=i;
+
+	if (j%2==0) {
+		c=image[y+x]&0xf;
+	}
+	else {
+		c=((image[y+x])>>4)&0xf;
+	}
+
+	return c;
+}
 
 int main(int argc, char **argv) {
 
-	int i,j;
+	int i,j,fd,addr=0,max;
+	char *filename;
+
+	if (argc<2) {
+		filename=strdup("chiptune.gr");
+	}
+	else {
+		filename=strdup(argv[1]);
+	}
+
+	fd=open(filename,O_RDONLY);
+	if (fd<0) {
+		printf("Error operning %s\n",filename);
+		return -1;
+	}
+	read(fd,&image,1024);
+	close(fd);
 
 //	printf("\\documentclass{article}\n");
 //	printf("\\usepackage{graphicx}\n");
 //	printf("\\usepackage{colortbl}\n");
 //	printf("\\begin{document}\n");
 
+	/* First plot, interleaved */
+
 	printf("\\tabcolsep=0.11cm\n");
 	printf("\\renewcommand{\\arraystretch}{0.5}\n");
-	printf("\\begin{tiny}\n");
 
+	printf("\\begin{tiny}\n");
 	printf("\\begin{table*}\n");
 
-	printf("\\caption{Apple II lores memory, showing the interleaving"
-		" of the 40x48 display.\\label{table:loresmap}}\n");
+	printf("\\caption{Apple II lores display, 40x48.  "
+		"Note the interleaving of the row addresses.  "
+		"Rows 40-47 are ASCII text being interpreted as graphic blocks.\\label{table:loresmap}}\n");
 	printf("\\centering\n");
 	printf("\\begin{tabular}{|l|l|");
 	for(i=0;i<COLUMNS;i++) printf("c|");
@@ -51,7 +91,6 @@ int main(int argc, char **argv) {
 
 
 
-
 	for(j=0;j<ROWS;j++) {
 		if (j%2==0) {
 			printf("\\hline\n");
@@ -66,7 +105,8 @@ int main(int argc, char **argv) {
 		printf("%d &",j);
 
 		for(i=0;i<COLUMNS;i++) {
-			printf("\\cellcolor{red}");
+			printf("\\cellcolor{color%d}",
+				color(i,j));
 			if (i<COLUMNS-1) printf("&");
 			else printf("\\\\\n");
 		}
@@ -75,6 +115,77 @@ int main(int argc, char **argv) {
 	printf("\\end{tabular}\n");
 	printf("\\end{table*}\n");
 	printf("\\end{tiny}\n");
+
+
+	/* Second plot, this one showing non-interleaved */
+
+	printf("\\begin{tiny}\n");
+	printf("\\begin{table*}\n");
+
+	printf("\\caption{Apple II lores raw memory if viewed linearly. "
+		"Note the screen ``holes'' which pad every third line to a 128 "
+		"byte boundary.  This unused memory can be used by I/O cards. "
+		"\\label{table:linear}}\n");
+	printf("\\centering\n");
+	printf("\\begin{tabular}{|l|l|");
+	for(i=0;i<COLUMNS+8;i++) printf("c|");
+	printf("}\n");
+
+//	printf("\\hline\n");
+
+	addr=0x400;
+
+	for(j=0;j<ROWS;j++) {
+		if (j%2==0) {
+			printf("\\hline\n");
+			printf("\\multirow{2}{*}{\\tt \\$%3X} &",
+					addr);
+		}
+		else {
+			printf("\\cline{2-42}\n");
+			printf("&");
+		}
+
+		printf("%d &",j);
+
+		if ((j/2)%3==2) {
+			max=COLUMNS+8;
+		}
+		else {
+			max=COLUMNS;
+		}
+
+		for(i=0;i<max;i++) {
+			if (j%2==0) {
+				printf("\\cellcolor{color%d}",
+					image[(addr-0x400)+i]&0xf);
+			}
+			else {
+				printf("\\cellcolor{color%d}",
+					(image[(addr-0x400)+i]>>4)&0xf);
+
+			}
+			if (i<max-1) printf("&");
+			else printf("\\\\\n");
+		}
+
+		if ((j%6)==1) {
+			addr+=40;
+		}
+		else if ((j%6)==3) {
+			addr+=40;
+		}
+		else if ((j%6)==5) {
+			addr+=40+8;
+		}
+
+	}
+	printf("\\hline\n");
+	printf("\\end{tabular}\n");
+	printf("\\end{table*}\n");
+	printf("\\end{tiny}\n");
+
+
 //	printf("\\end{document}\n");
 
 	return 0;