Does the SNES have Bios

[Cool_Hylian]

Not asking for them, just asking if the SNES does.

[Agozer]

No.

The Nintendo Super System does (an arcade equivalent of the SNES).

[Cool_Hylian]

Well I be.....

[byuu]

Code: Select all

const uint8 SMP::iplrom[64] = {
/*ffc0*/ 0xcd, 0xef,       //mov   x,#$ef
/*ffc2*/ 0xbd,             //mov   sp,x
/*ffc3*/ 0xe8, 0x00,       //mov   a,#$00
/*ffc5*/ 0xc6,             //mov   (x),a
/*ffc6*/ 0x1d,             //dec   x
/*ffc7*/ 0xd0, 0xfc,       //bne   $ffc5
/*ffc9*/ 0x8f, 0xaa, 0xf4, //mov   $f4,#$aa
/*ffcc*/ 0x8f, 0xbb, 0xf5, //mov   $f5,#$bb
/*ffcf*/ 0x78, 0xcc, 0xf4, //cmp   $f4,#$cc
/*ffd2*/ 0xd0, 0xfb,       //bne   $ffcf
/*ffd4*/ 0x2f, 0x19,       //bra   $ffef
/*ffd6*/ 0xeb, 0xf4,       //mov   y,$f4
/*ffd8*/ 0xd0, 0xfc,       //bne   $ffd6
/*ffda*/ 0x7e, 0xf4,       //cmp   y,$f4
/*ffdc*/ 0xd0, 0x0b,       //bne   $ffe9
/*ffde*/ 0xe4, 0xf5,       //mov   a,$f5
/*ffe0*/ 0xcb, 0xf4,       //mov   $f4,y
/*ffe2*/ 0xd7, 0x00,       //mov   ($00)+y,a
/*ffe4*/ 0xfc,             //inc   y
/*ffe5*/ 0xd0, 0xf3,       //bne   $ffda
/*ffe7*/ 0xab, 0x01,       //inc   $01
/*ffe9*/ 0x10, 0xef,       //bpl   $ffda
/*ffeb*/ 0x7e, 0xf4,       //cmp   y,$f4
/*ffed*/ 0x10, 0xeb,       //bpl   $ffda
/*ffef*/ 0xba, 0xf6,       //movw  ya,$f6
/*fff1*/ 0xda, 0x00,       //movw  $00,ya
/*fff3*/ 0xba, 0xf4,       //movw  ya,$f4
/*fff5*/ 0xc4, 0xf4,       //mov   $f4,a
/*fff7*/ 0xdd,             //mov   a,y
/*fff8*/ 0x5d,             //mov   x,a
/*fff9*/ 0xd0, 0xdb,       //bne   $ffd6
/*fffb*/ 0x1f, 0x00, 0x00, //jmp   ($0000+x)
/*fffe*/ 0xc0, 0xff        //---reset vector location ($ffc0)
};

[creaothceann]

Not asking for them, just asking if the SNES does.

The processor in the APU (audio processing unit) does have a small 64-byte ROM (see byuu's post) that becomes active when the console starts up. It's responsible for getting the game's audio routines into that unit.

All other routines must be provided by the programmer; there's no other built-in code.