First check-in

Makefile

@@ -0,0 +1,49 @@
+# Builds circ demo
+
+# Requirements:
+# 1. Gmake must be used.
+# 2. The cc65 compiler must be properly setup.
+
+ifndef CC65_TARGET
+	CC65_TARGET:=apple2enh
+endif
+
+CC=cl65
+CFLAGS=-O -t $(CC65_TARGET) -DTRACE
+# The -S $6000 makes the start address $6000 so that both hi-res
+# pages are available.
+LDFLAGS=-t $(CC65_TARGET)
+DISK_VOL=circ
+DISK=$(DISK_VOL).dsk
+PGM=circ
+GRAF_DRVR=a2e.hi
+DYN_GRAF_DRVR=a2e.hi.tgi
+BASIC_AUX_TYPE=0x0801
+READ_TIME_LOAD_ADDR=0x0260
+AC=java -jar AppleCommander-ac-1.4.0.jar
+SYS_LOAD_ADDR=0x2000
+BIN_LOAD_ADDR=0x0803
+MKDISK=$(AC) -pro140 $(DISK) $(DISK_VOL)
+
+########################################
+
+all: $(DISK)
+
+$(DISK): $(PGM) 
+	$(RM) $(DISK)
+	$(AC) -pro140 $(DISK) $(DISK_VOL)
+	$(AC) -as $(DISK) $(PGM) BIN < $(PGM)
+	$(AC) -p $(DISK) $(DYN_GRAF_DRVR) BIN < $(DYN_GRAF_DRVR)
+
+$(PGM): $(PGM).o $(GRAF_DRVR).o
+	$(CC) $(LDFLAGS) -o $@ $^
+
+$(GRAF_DRVR).o: $(GRAF_DRVR).s
+	ca65 $^
+
+$(GRAF_DRVR).s: $(GRAF_DRVR).tgi
+	co65 --code-label _a2e_hi $^
+
+clean:
+	$(RM) *.o $(PGM) $(DISK) $(GRAF_DRVR).s
+

circ.c

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+#include <stdio.h>
+#include <stdlib.h>     /* _heapadd */
+#include <apple2enh.h>  /* videomode */
+#include <tgi.h>
+
+#ifdef TRACE
+#define TRACE_MSG puts
+#define TRACE_VAR printf
+#else
+#define TRACE_MSG
+#define TRACE_VAR
+#endif
+
+#define STR_SIZ 256
+
+static void checkError(const char *message);
+
+/**
+ * References first byte in static graphics driver.
+ */
+extern char a2e_hi;
+
+const char *GRAPHICS_DRIVER = "a2e.hi.tgi";
+char response[STR_SIZ];
+
+int main(void)
+{
+    unsigned char tgiErrorCode = TGI_ERR_OK;
+
+    /* Make more heap memory available: $803 - $1fff. */
+    //TRACE_MSG("_heapadd");
+    //_heapadd((void *) 0x0803, 0x17FD);
+
+    /* Make sure second hi-res page is available by putting the text mode
+       in 40 columns. */
+    TRACE_MSG("videomode");
+    videomode(VIDEOMODE_40COL);
+    
+#if DYNAMIC_GRAPHICS_DRIVER
+    TRACE_VAR("tgi_load_driver: %s\n", tgi_stddrv);
+    tgi_load_driver(tgi_stddrv);
+    checkError("Failed to load graphics driver");
+#else
+    TRACE_MSG("tgi_install");
+    tgi_install(tgi_static_stddrv); //a2e_hi
+    TRACE_MSG("After tgi_install");
+    checkError("Failed to install graphics driver");
+#endif
+
+    TRACE_MSG("tgi_init");
+    tgi_init();
+    TRACE_MSG("tgi_clear");
+    tgi_clear();
+    checkError("Failed to clear graphics screen");
+    TRACE_MSG("tgi_setcolor");
+    tgi_setcolor(TGI_COLOR_BLUE);
+    TRACE_MSG("tgi_setviewpage");
+    tgi_setviewpage(0);
+    TRACE_MSG("tgi_setdrawpage");
+    tgi_setdrawpage(1);
+    TRACE_MSG("tgi_circle");
+    tgi_circle(50, 50, 40);
+
+    fgets(response, STR_SIZ, stdin);
+
+    TRACE_MSG("tgi_done");
+    tgi_done();
+
+#if DYNAMIC_GRAPHICS_DRIVER
+    TRACE_MSG("tgi_unload");
+    tgi_unload();
+#else
+    TRACE_MSG("tgi_uninstall");
+    tgi_uninstall();
+#endif
+
+    return EXIT_SUCCESS;
+}
+
+void checkError(const char* message)
+{
+    unsigned char errorCode;
+
+    TRACE_MSG("Entering checkError");
+    errorCode = tgi_geterror();
+    TRACE_MSG("After tgi_geterror");
+    if (errorCode != TGI_ERR_OK) {
+        fprintf(stderr, "%s: %d\n", message, errorCode);
+        exit(EXIT_FAILURE);
+    }
+    TRACE_MSG("Exiting checkError");
+}
+