+#include <stdlib.h>
#include <stdarg.h>
#define u8 unsigned char
#define u32 unsigned int
#define noinline __attribute__((noinline))
+#define _packed __attribute__((packed))
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#include "edos.h"
#include "asmtools.h"
+extern u16 start_hvc;
+
#define GFX_DATA_PORT 0xC00000
#define GFX_CTRL_PORT 0xC00004
#define TILE_FONT_BASE (TILE_MEM_END / 32 - FONT_LEN)
/* note: using ED menu's layout here.. */
-#define WPLAN (TILE_MEM_END + 0x0000)
+#define WPLANE (TILE_MEM_END + 0x0000)
#define HSCRL (TILE_MEM_END + 0x0800)
#define SLIST (TILE_MEM_END + 0x0C00)
#define APLANE (TILE_MEM_END + 0x1000)
#define BPLANE (TILE_MEM_END + 0x3000)
+#define read8(a) \
+ *((volatile u8 *) (a))
+#define read16(a) \
+ *((volatile u16 *) (a))
+#define read32(a) \
+ *((volatile u32 *) (a))
#define write16(a, d) \
*((volatile u16 *) (a)) = (d)
#define write32(a, d) \
/* scroll plane */
write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0));
- write16(GFX_DATA_PORT, (printf_ypos - 27) * 8);
+ write16(GFX_DATA_PORT, (printf_ypos - CSCREEN_H + 1) * 8);
}
}
break;
case 'x':
uval = va_arg(ap, int);
- while (fwidth > 0 && uval < (1 << (fwidth - 1) * 4)) {
+ while (fwidth > 1 && uval < (1 << (fwidth - 1) * 4)) {
buf[d++] = prefix0 ? '0' : ' ';
fwidth--;
}
return d; // wrong..
}
-void exception(void)
+static const char *exc_names[] = {
+ NULL,
+ NULL,
+ "Bus Error",
+ "Address Error",
+ "Illegal Instruction",
+ "Zero Divide",
+ "CHK Instruction",
+ "TRAPV Instruction",
+ "Privilege Violation", /* 8 8 */
+ "Trace",
+ "Line 1010 Emulator",
+ "Line 1111 Emulator",
+ NULL,
+ NULL,
+ NULL,
+ "Uninitialized Interrupt",
+ NULL, /* 10 16 */
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ "Spurious Interrupt", /* 18 24 */
+ "l1 irq",
+ "l2 irq",
+ "l3 irq",
+ "l4 irq",
+ "l5 irq",
+ "l6 irq",
+ "l7 irq",
+};
+
+struct exc_frame {
+ u32 dr[8];
+ u32 ar[8];
+ u16 ecxnum; // from handler
+ union {
+ struct {
+ u16 sr;
+ u32 pc;
+ } g _packed;
+ struct {
+ u16 fc;
+ u32 addr;
+ u16 ir;
+ u16 sr;
+ u32 pc;
+ } bae _packed; // bus/address error frame
+ };
+} _packed;
+
+int xtttt(void) { return sizeof(struct exc_frame); }
+
+void exception(const struct exc_frame *f)
{
- VDP_drawTextML("============", APLANE, 0, 0);
- VDP_drawTextML(" exception! ", APLANE, 0, 1);
- VDP_drawTextML("============", APLANE, 0, 2);
- while (1)
+ int i;
+
+ while (read16(GFX_CTRL_PORT) & 2)
;
+ write16(GFX_CTRL_PORT, 0x8000 | (VDP_MODE1 << 8) | 0x04);
+ write16(GFX_CTRL_PORT, 0x8000 | (VDP_MODE2 << 8) | 0x44);
+ /* adjust scroll */
+ write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0));
+ write16(GFX_DATA_PORT,
+ printf_ypos >= CSCREEN_H ?
+ (printf_ypos - CSCREEN_H + 1) * 8 : 0);
+
+ printf("exception %i ", f->ecxnum);
+ if (f->ecxnum < ARRAY_SIZE(exc_names) && exc_names[f->ecxnum] != NULL)
+ printf("(%s)", exc_names[f->ecxnum]);
+ if (f->ecxnum < 4)
+ printf(" (%s)", (f->bae.fc & 0x10) ? "r" : "w");
+ printf(" \n");
+
+ if (f->ecxnum < 4) {
+ printf(" PC: %08x SR: %04x \n", f->bae.pc, f->bae.sr);
+ printf("addr: %08x IR: %04x FC: %02x \n",
+ f->bae.addr, f->bae.ir, f->bae.fc);
+ }
+ else {
+ printf(" PC: %08x SR: %04x \n", f->g.pc, f->g.sr);
+ }
+ for (i = 0; i < 8; i++)
+ printf(" D%d: %08x A%d: %08x \n", i, f->dr[i], i, f->ar[i]);
+ printf(" \n");
}
void vbl(void)
}
static int usb_read_while_ready(OsRoutine *ed,
- void *buf_, int maxlen)
+ void *buf_, unsigned int maxlen)
{
u8 *buf = buf_;
- int r = 0;
+ unsigned int r = 0;
while (ed->usbRdReady() && r < maxlen)
buf[r++] = ed->usbReadByte();
return r;
}
+static int usb_read(OsRoutine *ed, void *buf_, unsigned int maxlen)
+{
+ u8 *buf = buf_;
+ unsigned int r = 0;
+
+ while (r < maxlen)
+ buf[r++] = ed->usbReadByte();
+
+ return r;
+}
+
+static int usb_write(OsRoutine *ed, const void *buf_, unsigned int maxlen)
+{
+ const u8 *buf = buf_;
+ unsigned int r = 0;
+
+ while (r < maxlen)
+ ed->usbWriteByte(buf[r++]);
+
+ return r;
+}
+
/*
* TH = 1 : ?1CBRLDU 3-button pad return value (not read)
* TH = 0 : ?0SA00DU 3-button pad return value
return -1;
}
+static int do_custom(OsRoutine *ed, u8 b3)
+{
+ struct {
+ unsigned int addr;
+ unsigned int size;
+ } d;
+
+ switch (b3)
+ {
+ case 'd':
+ usb_read(ed, &d, sizeof(d));
+ ed->usbWriteByte('k');
+ printf("sending %i bytes from %06x..\n", d.size, d.addr);
+ usb_write(ed, (void *)d.addr, d.size);
+ printf("done.\n");
+ return 1;
+ default:
+ break;
+ }
+
+ return -1;
+}
+
+#define MTYPE_OS 0
+#define MTYPE_MD 1
+#define MTYPE_SSF 2
+#define MTYPE_CD 3
+#define MTYPE_SMS 4
+#define MTYPE_10M 5
+#define MTYPE_32X 6
+
+static int do_run(OsRoutine *ed, u8 b3, int tas_sync)
+{
+ u8 mapper = 0;
+
+ switch (b3)
+ {
+ case 's':
+ mapper = MTYPE_SMS | (7 << 4);
+ break;
+ case 'm':
+ mapper = MTYPE_MD;
+ break;
+ case 'o':
+ mapper = MTYPE_OS;
+ break;
+ case 'c':
+ mapper = MTYPE_CD;
+ break;
+ case '3':
+ mapper = MTYPE_32X;
+ break;
+ case 'M':
+ mapper = MTYPE_10M;
+ break;
+ default:
+ return -1;
+ }
+
+ printf("starting mapper %x..\n", mapper);
+
+ while (read16(GFX_CTRL_PORT) & 2)
+ ;
+ ed->VDP_setReg(VDP_MODE1, 0x04);
+ ed->VDP_setReg(VDP_MODE2, 0x44);
+
+ ed->usbWriteByte('k');
+
+ run_game(mapper, tas_sync);
+ /* should not get here.. */
+
+ return -1;
+}
+
int main()
{
OsRoutine *ed;
u8 buf[16];
+ int len;
int i, d, ret;
ed = (OsRoutine *) *(u32 *)0x1A0;
for (i = 0; i < PLANE_W * PLANE_H / 2; i++)
write32(GFX_DATA_PORT, 0);
+ /* scroll planes */
+ write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0));
+ write32(GFX_DATA_PORT, 0);
+
/* note: relying on ED menu's font setup here.. */
+ printf("\n");
+ printf("version: %02x, start_hvc: %04x\n",
+ read8(0xa10001), start_hvc);
+ printf("ED os/fw: %x/%x\n\n", ed->osGetOsVersion(),
+ ed->osGetFirmVersion());
+
for (;;) {
if (!ed->usbRdReady()) {
asm volatile("stop #0x2000");
case 'T':
ed->usbWriteByte('k');
break;
+ case 'g':
+ len = ed->usbReadByte() * 128;
+ printf("loading %d bytes.. ", len * 512);
+ ed->usbWriteByte('k');
+ ed->usbReadDma((void *)0x200000, len);
+ ed->usbWriteByte('d');
+ printf("done\n");
+ break;
+ case 'r':
+ case 'R':
+ buf[2] = ed->usbReadByte();
+ ret = do_run(ed, buf[2], buf[1] == 'R');
+ if (ret != 0) {
+ d = 3;
+ goto bad_input;
+ }
+ printf("run returned??\n");
+ break;
+
/* custom */
case 't':
buf[2] = ed->usbReadByte();
}
ed->usbWriteByte('k');
break;
+ case 'x':
+ buf[2] = ed->usbReadByte();
+ ret = do_custom(ed, buf[2]);
+ if (ret == 1)
+ break;
+ if (ret != 0) {
+ d = 3;
+ goto bad_input;
+ }
+ ed->usbWriteByte('k');
+ break;
default:
d = 2;
goto bad_input;
notaz.gp2x.de / megadrive.git / blobdiff