/* copy rom over itself */
void
shadowrom_enable(void)
{
UBYTE r1, r2;
r1 = cfgreg_read(CFG_R1_OFFSET);
r2 = cfgreg_read(CFG_R2_OFFSET);
if (r2 & CFG_R2_68KMODE_STATUS) {
printf("Cannot use SHADOWROM if running on 68000! Please reenable 68020 and reboot first.\n");
return;
}
if ( (r1 & CFG_R1_MAPROM) || (r2 & CFG_R2_MAPROM_STATUS)) {
printf("Cannot enable Shadow ROM if MAPROM enabled or currently active!\n");
return;
}
/* cfgreg_set(CFG_R0_OFFSET, CFG_R0_WRITELOCKOFF); */
memcpy((void*) 0xE00000, (void*) 0xE00000, 512*1024);
memcpy((void*) 0xF80000, (void*) 0xF80000, 512*1024);
/* cfgreg_unset(CFG_R0_OFFSET, CFG_R0_WRITELOCKOFF); */
cfgreg_set(CFG_R1_OFFSET, CFG_R1_SHADOWROM);
}
/* read and display configuration registers */
void
status_display(void)
{
UBYTE r0, r1, r2;
r0 = cfgreg_read(CFG_R0_OFFSET);
r1 = cfgreg_read(CFG_R1_OFFSET);
r2 = cfgreg_read(CFG_R2_OFFSET);
printf("\tNinetails revision:\t\t\t%d\n", hwrev);
printf(" ================== CPU / Memory options ================== \n");
printf("\tEnable MC68000 mode (reset):\t\t");
status_print_reg(r0, CFG_R0_68KMODE);
printf("\tMC68000 mode status:\t\t\t");
status_print_reg(r2, CFG_R2_68KMODE_STATUS);
printf("\tPCMCIA friendly - 4MB Fast RAM (reset):\t");
status_print_reg(r0, CFG_R0_PCMCIA);
printf("\tMC68EC020 instruction cache:\t\t");
status_print_reg_inv(r1, CFG_R1_INSTCACHEOFF);
printf(" ======================= ROM options ====================== \n");
printf("\tMAPROM at next reset:\t\t\t");
status_print_reg(r1, CFG_R1_MAPROM);
printf("\tMAPROM status:\t\t\t\t");
status_print_reg(r2, CFG_R2_MAPROM_STATUS);
printf("\tShadow ROM:\t\t\t\t");
status_print_reg(r1, CFG_R1_SHADOWROM);
}
void
maprom_enable(BYTE *path)
{
BYTE *rombuf;
ULONG romsize;
UBYTE r1, r2;
r1 = cfgreg_read(CFG_R1_OFFSET);
r2 = cfgreg_read(CFG_R2_OFFSET);
/* do some sanity checks first */
if (r1 & CFG_R1_SHADOWROM) {
printf("Cannot use MAPROM if Shadow ROM enabled. Please disable Shadow ROM and reboot first!\n");
return;
}
if (r2 & CFG_R2_MAPROM_STATUS) {
printf("Cannot load new ROM if MAPROM currently active. Please disable MAPROM and reboot first!\n");
return;
}
if (r2 & CFG_R2_68KMODE_STATUS) {
printf("Cannot use MAPROM if running on 68000! Please reenable 68020 and reboot first.\n");
return;
}
#ifdef DEBUG
printf("DEBUG: will load ROM from %s\n", path);
#endif /* DEBUG */
romsize = file_size(path);
#ifdef DEBUG
printf("DEBUG: m'kay so apparanetly loaded ROM has size: %lx\n", romsize);
#endif /* DEBUG */
rombuf = (char*) malloc(romsize);
#ifdef DEBUG
printf("DEBUG: allocated %x bytes at address %p, ready to load data\n", (unsigned int) romsize, (void*) rombuf);
#endif /* DEBUG */
file_load(path, rombuf, romsize);
rom_copy_self(rombuf, romsize);
/*rom_copy_bank(rombuf, romsize);*/
cfgreg_set(CFG_R1_OFFSET, CFG_R1_MAPROM);
free(rombuf);
printf("Your Amiga should be restarted now...\n");
}
