Added HGR and DHGR slide show programs.

The DHGR program is sort of a hack as it first switches to double (aka 80 col) text mode to prepare for double graphics mode. Therefore only one additional soft switch access is necessary after using TGI to generally switch to hires.

testcode/lib/apple2/Makefile

@@ -1,12 +1,37 @@
 # For this one see https://applecommander.github.io/
 AC ?= ac.jar
 
-CL      = cl65
-CLFLAGS = -t apple2 -C apple2-hgr.cfg -Oirs
+CL ?= cl65
 
-hgrtest.dsk: hgrtest
+all: hgr.dsk dhgr.dsk
+
+hgr.dsk: hgrshow hgrtest
 	cp prodos.dsk $@
-	java -jar $(AC) -cc65 $@ hgrtest bin <hgrtest
+	java -jar $(AC) -as $@ hgrshow <hgrshow
+	java -jar $(AC) -as $@ hgrtest <hgrtest
+	java -jar $(AC) -p  $@ astronaut.hgr  bin 0x2000 <astronaut.hgr
+	java -jar $(AC) -p  $@ chips.hgr      bin 0x2000 <chips.hgr
+	java -jar $(AC) -p  $@ macrometer.hgr bin 0x2000 <macrometer.hgr
+	java -jar $(AC) -p  $@ mariner.hgr    bin 0x2000 <mariner.hgr
+	java -jar $(AC) -p  $@ rose.hgr       bin 0x2000 <rose.hgr
+	java -jar $(AC) -p  $@ werner.hgr     bin 0x2000 <werner.hgr
+	java -jar $(AC) -p  $@ winston.hgr    bin 0x2000 <winston.hgr
+
+hgrshow: hgrshow.c
+	$(CL) -Oirs -t apple2 --start-addr 0x4000 -m hgrshow.map $^
 
 hgrtest: hgrtest.c werner.s
-	$(CL) $(CLFLAGS) -m hgrtest.map $^
+	$(CL) -Oirs -t apple2 -C apple2-hgr.cfg -m hgrtest.map $^
+
+dhgr.dsk: dhgrshow
+	cp prodos.dsk $@
+	java -jar $(AC) -as $@ dhgrshow <dhgrshow
+	java -jar $(AC) -p  $@ catface.dhgr  bin 0x2000 <catface.dhgr
+	java -jar $(AC) -p  $@ gatsby.dhgr   bin 0x2000 <gatsby.dhgr
+	java -jar $(AC) -p  $@ girl.dhgr     bin 0x2000 <girl.dhgr
+	java -jar $(AC) -p  $@ monarch.dhgr  bin 0x2000 <monarch.dhgr
+	java -jar $(AC) -p  $@ superman.dhgr bin 0x2000 <superman.dhgr
+	java -jar $(AC) -p  $@ venice.dhgr   bin 0x2000 <venice.dhgr
+
+dhgrshow: dhgrshow.c
+	$(CL) -Oirs -t apple2enh --start-addr 0x4000 -m dhgrshow.map $^

testcode/lib/apple2/dhgrshow.c

@@ -0,0 +1,45 @@
+// cl65 -t apple2enh --start-addr 0x4000 dhgrshow.c
+
+#include <tgi.h>
+#include <conio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <peekpoke.h>
+
+void main (void)
+{
+    unsigned old;
+    DIR *dir;
+    struct dirent *ent;
+
+    old = videomode (VIDEOMODE_80x24);
+    tgi_install (a2e_hi_tgi);
+    tgi_init ();
+    POKE (0xC05E, 0);
+
+    dir = opendir (".");
+    while (ent = readdir (dir)) {
+        char *ext;
+        int hgr;
+
+        ext = strrchr (ent->d_name, '.');
+        if (!ext || strcasecmp (ext, ".dhgr"))
+            continue;
+
+        hgr = open(ent->d_name, O_RDONLY);
+        POKE (0xC055, 0);
+        read(hgr, (void*)0x2000, 0x2000);
+        POKE (0xC054, 0);
+        read(hgr, (void*)0x2000, 0x2000);
+        close(hgr);
+
+        if (cgetc () == '\r')
+            break;
+    }
+    closedir (dir);
+
+    tgi_uninstall ();
+    videomode (old);
+}

testcode/lib/apple2/hgrshow.c

@@ -0,0 +1,37 @@
+// cl65 -t apple2 --start-addr 0x4000 hgrshow.c
+
+#include <tgi.h>
+#include <conio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <dirent.h>
+
+void main (void)
+{
+    DIR *dir;
+    struct dirent *ent;
+
+    tgi_install (a2_hi_tgi);
+    tgi_init ();
+
+    dir = opendir (".");
+    while (ent = readdir (dir)) {
+        char *ext;
+        int hgr;
+
+        ext = strrchr (ent->d_name, '.');
+        if (!ext || strcasecmp (ext, ".hgr"))
+            continue;
+
+        hgr = open(ent->d_name, O_RDONLY);
+        read(hgr, (void*)0x2000, 0x2000);
+        close(hgr);
+
+        if (cgetc () == '\r')
+            break;
+    }
+    closedir (dir);
+
+    tgi_uninstall ();
+}

testcode/lib/apple2/werner.s

@@ -1,2 +1,2 @@
 .segment "HGR"
-.incbin "werner.pic"
+.incbin "werner.hgr"