X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/5ae81164883c737f0204dc26beb7bb7488693a1d..90122e523ed5d77a6951ec7332c7d5e72eec802c:/aseg/vga-overlay.c

diff --git a/aseg/vga-overlay.c b/aseg/vga-overlay.c
index e5414ca..7d107d7 100644
--- a/aseg/vga-overlay.c
+++ b/aseg/vga-overlay.c
@@ -2,8 +2,15 @@
 #include <smram.h>
 #include <video_defines.h>
 #include <minilib.h>
+#include <stdarg.h>
+#include <output.h>
 
-static char logents[4][41] = {{0}};
+#define LOGLEN 96
+#define LOG_ONSCREEN 4
+
+static char logents[LOGLEN][41] = {{0}};
+static int prodptr = 0;
+static int flush_imm = 0;
 
 #define VRAM_BASE		0xA0000UL
 #define TEXT_CONSOLE_OFFSET	0x18000UL 
@@ -12,6 +19,11 @@ static char logents[4][41] = {{0}};
 
 #define COLOR			0x1F
 
+void vga_flush_imm(int imm)
+{
+	flush_imm = imm;
+}
+
 static unsigned char vga_read(unsigned char idx)
 {
 	outb(CRTC_IDX_REG, idx);
@@ -22,8 +34,8 @@ static char * vga_base()
 {
 	return (char *) (
 		TEXT_CONSOLE_BASE
-		| (((unsigned int) vga_read(CRTC_START_ADDR_LSB_IDX)) << 9)
-		| (((unsigned int) vga_read(CRTC_START_ADDR_MSB_IDX)) << 1)
+		+ (((unsigned int) vga_read(CRTC_START_ADDR_MSB_IDX)) << 9)
+		+ (((unsigned int) vga_read(CRTC_START_ADDR_LSB_IDX)) << 1)
 	);
 }
 
@@ -33,7 +45,7 @@ void strblit(char *src, int row, int col)
 	smram_state_t old_state = smram_save_state();
 
 	smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
-	
+
 	while (*src)
 	{
 		*(destp++) = *(src++);
@@ -52,7 +64,7 @@ void outlog()
 
 	smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
 
-	for (y = 0; y < 4; y++)
+	for (y = 0; y < LOG_ONSCREEN; y++)
 		for (x = 40; x < 80; x++)
 		{
 			basep[y*80*2+x*2] = ' ';
@@ -60,13 +72,33 @@ void outlog()
 		}
 
 	smram_restore_state(old_state);
+	
+	for (y = -LOG_ONSCREEN; y < 0; y++)
+		strblit(logents[(y + prodptr) % LOGLEN], y + LOG_ONSCREEN, 40);
+}
 
-	for (y = 0; y < 4; y++)
-		strblit(logents[y], y, 40);
+void dolog(const char *s)
+{
+	strcpy(logents[prodptr], s);
+	prodptr = (prodptr + 1) % LOGLEN;
+	if (flush_imm)
+		outlog();
 }
+void (*output)(const char *s) = dolog;
 
-void dolog(char *s)
+void dologf(const char *fmt, ...)
 {
-	memmove(logents[0], logents[1], sizeof(logents[0])*3);
-	strcpy(logents[3], s);
+	va_list va;
+	
+	va_start(va, fmt);
+	vsnprintf(logents[prodptr], 40, fmt, va);
+	va_end(va);
+	prodptr = (prodptr + 1) % LOGLEN;
+	if (flush_imm)
+		outlog();
+}
+void (*outputf)(const char *s, ...) = dologf;
+
+void dump_log (char * target) {
+	memcpy(target, logents, sizeof(logents));
 }