## MMC5, Metal Slader Glory and IRQs

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### MMC5, Metal Slader Glory and IRQs

The Nintendulator screenshot below depicts part of the intro to Metal Slader Glory.7z <Metal Slader Glory (J).nes>.

The box containing the person has a horizontal, blue line at the bottom. The blue line also appears in Nestopia. But, it is absent in FCEUX, puNES and Mesen.

Does anyone have a recording of the intro from actual Famicom hardware? The MMC5 IRQ scanline counting is off in some emulators.

The box containing the person has a horizontal, blue line at the bottom. The blue line also appears in Nestopia. But, it is absent in FCEUX, puNES and Mesen.

Does anyone have a recording of the intro from actual Famicom hardware? The MMC5 IRQ scanline counting is off in some emulators.

### Re: MMC5, Metal Slader Glory and IRQs

Buy me the cart and I'll test + do recordings on actual hardware. :)

### Re: MMC5, Metal Slader Glory and IRQs

I wonder how many peoples are playing this game...koitsu wrote:Buy me the cart and I'll test + do recordings on actual hardware.

### Re: MMC5, Metal Slader Glory and IRQs

That game actually looks really incredible.Zepper wrote:I wonder how many peoples are playing this game...

But, more importantly, it reveals a timing flaw in MMC5 emulation. Treat it as a test ROM.

- rainwarrior
**Posts:**7642**Joined:**Sun Jan 22, 2012 12:03 pm**Location:**Canada-
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### Re: MMC5, Metal Slader Glory and IRQs

If you want to test something about the MMC5 IRQ, you can write a hotswap test and use

I have Uchuu Keibitai SDF, which I think has an identical board (ELROM), if you think there's any analog components relevant to the test that you wouldn't trust on a different MMC5 board.

~~which already has a translation~~, so it's basically the inferior version, only of interest if you're specifically NES focused.

*any*MMC5 cart, you don't need Metal Slader Glory. Maybe do some debugging on MSG to determine exactly what you think is questionable about the emulation, and then write a test specifically for that.I have Uchuu Keibitai SDF, which I think has an identical board (ELROM), if you think there's any analog components relevant to the test that you wouldn't trust on a different MMC5 board.

Probably not many, because it's never been translated to English. It's never been translated to English because it's a port of a SNES game,Zepper wrote:I wonder how many peoples are playing this game...

*Edit: SNES version doesn't actually seem to have a translation. I misremembered?*
Last edited by rainwarrior on Tue Jan 10, 2017 1:16 am, edited 1 time in total.

- Drew Sebastino
- Formerly Espozo
**Posts:**3503**Joined:**Mon Sep 15, 2014 4:35 pm**Location:**Richmond, Virginia

### Re: MMC5, Metal Slader Glory and IRQs

"Game"? You're not talking about this, are you?Zepper wrote:I wonder how many peoples are playing this game...

### Re: MMC5, Metal Slader Glory and IRQs

How would you test IRQ behavior if you don't have control over the IRQ vector?rainwarrior wrote:If you want to test something about the MMC5 IRQ, you can write a hotswap test and useanyMMC5 cart

### Re: MMC5, Metal Slader Glory and IRQs

Other way around, actually - the SNES version is the port, and the NES version is the one with the (unfinished, unreleased) translation.rainwarrior wrote:It's never been translated to English because it's a port of a SNES game, which already has a translation

### Re: MMC5, Metal Slader Glory and IRQs

Do any MMC5 games point their vectors at RAM?

- rainwarrior
**Posts:**7642**Joined:**Sun Jan 22, 2012 12:03 pm**Location:**Canada-
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### Re: MMC5, Metal Slader Glory and IRQs

tokumaru wrote:How would you test IRQ behavior if you don't have control over the IRQ vector?rainwarrior wrote:If you want to test something about the MMC5 IRQ, you can write a hotswap test and useanyMMC5 cart

*Edit: Tepples has and idea, see below.*

I thought I remembered the SNES version having a complete translation, but apparently I was wrong about this as well.Revenant wrote:the NES version is the one with the (unfinished, unreleased) translation.

0 for 2. Ha ha, sorry about that.

Last edited by rainwarrior on Mon Jan 09, 2017 11:36 pm, edited 1 time in total.

- rainwarrior
**Posts:**7642**Joined:**Sun Jan 22, 2012 12:03 pm**Location:**Canada-
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### Re: MMC5, Metal Slader Glory and IRQs

Oh yeah, good idea! We're in luck! Scanning the 8k PRG banks:tepples wrote:Do any MMC5 games point their vectors at RAM?

Code: Select all

```
Metal Slader Glory (Japan).nes
PRG size: 512k
Vectors bank 00: A730, 2F04, 1F46
Vectors bank 01: 2B40, 2120, 802B
Vectors bank 02: 5E00, 3E82, 0009
Vectors bank 03: 4E00, 02D0, 41A8
Vectors bank 04: BF9F, E08B, 9204
Vectors bank 05: 003A, 5100, 0041
Vectors bank 06: 0000, AFAB, 0000
Vectors bank 07: 0040, 2E46, 4100
Vectors bank 08: 9FBF, 0819, FE01
Vectors bank 09: F8EA, 204B, 4100
Vectors bank 0A: 0536, EA8F, 41A8
Vectors bank 0B: 4953, 02CE, 4151
Vectors bank 0C: 0068, 4B49, 4100
Vectors bank 0D: 3245, 4106, 0006
Vectors bank 0E: 0004, 0005, 0006
Vectors bank 0F: 4A49, 4100, 0001
Vectors bank 10: 010A, FA01, 0041
Vectors bank 11: 8220, 4C4E, 4108
Vectors bank 12: F8A8, 204D, 4100
Vectors bank 13: 8220, 814E, 4102
Vectors bank 14: 5152, 4041, 4100
Vectors bank 15: 0195, B401, 41A8
Vectors bank 16: 0200, 00D3, 4191
Vectors bank 17: 0040, AD4E, 4100
Vectors bank 18: 3030, 300F, 3030
Vectors bank 19: D000, 3A0A, 41A8
Vectors bank 1A: 18FE, 8BFF, 0000
Vectors bank 1B: B853, 2849, 4102
Vectors bank 1C: 010A, 000A, 1518
Vectors bank 1D: 0000, 3100, 0000
Vectors bank 1E: 4E02, 02F4, 41A8
Vectors bank 1F: 0042, 0043, 0044
Vectors bank 20: 0040, AE4E, 4100
Vectors bank 21: 031E, 7049, 4101
Vectors bank 22: 00AC, F8F7, 0041
Vectors bank 23: D003, 3A0A, 41A8
Vectors bank 24: 8210, 3149, 4100
Vectors bank 25: D003, 3A0A, 41A8
Vectors bank 26: B8EA, 9E49, 4100
Vectors bank 27: 01B4, 8210, 41A8
Vectors bank 28: 4D53, 031C, 41A8
Vectors bank 29: 0141, 0000, 0081
Vectors bank 2A: 3F85, 0009, 0000
Vectors bank 2B: 7B5F, 0E7D, 755F
Vectors bank 2C: 8A80, 091D, 0006
Vectors bank 2D: 8A10, 096F, 0006
Vectors bank 2E: 8269, 1D6F, 0009
Vectors bank 2F: 2001, 9587, 0009
Vectors bank 30: 726E, 0967, 0006
Vectors bank 31: 8187, 091E, 0006
Vectors bank 32: FC80, 0967, 0006
Vectors bank 33: 0433, 2005, 0001
Vectors bank 34: F785, 9880, 0002
Vectors bank 35: 9982, 1509, 0006
Vectors bank 36: 008B, 9880, 0002
Vectors bank 37: 8221, 093A, 0006
Vectors bank 38: 8162, 8082, 00F3
Vectors bank 39: 0000, 0000, 0000
Vectors bank 3A: FF00, 00FF, FF00
Vectors bank 3B: FF00, 00FF, FF00
Vectors bank 3C: FF00, 00FF, FF00
Vectors bank 3D: FF00, 00FF, FF00
Vectors bank 3E: FF00, 00FF, FF00
Vectors bank 3F: E9C3, E94E, F978
Uchuu Keibitai SDF (J).nes
PRG size: 128k
Vectors bank 00: FFFF, FFFF, FFFF
Vectors bank 01: FFFF, FFFF, FFFF
Vectors bank 02: FFFF, FFFF, FFFF
Vectors bank 03: FFFF, FFFF, FFFF
Vectors bank 04: FFFF, FFFF, FFFF
Vectors bank 05: FFFF, FFFF, FFFF
Vectors bank 06: FFFF, FFFF, FFFF
Vectors bank 07: FFFF, FFFF, FFFF
Vectors bank 08: FFFF, FFFF, FFFF
Vectors bank 09: FFFF, FFFF, FFFF
Vectors bank 0A: FFFF, FFFF, FFFF
Vectors bank 0B: 1B02, 0539, 0019
Vectors bank 0C: FFFF, FFFF, FFFF
Vectors bank 0D: E1E8, E4F2, FFFF
Vectors bank 0E: 074C, A9E0, 8D01
Vectors bank 0F: EC67, F916, ECFE
```

Code: Select all

```
def mmc5vectors(filename):
rom = open(filename,"rb").read()
print(filename)
prg = rom[4]
print("PRG size: %dk" % (prg * 16))
for i in range(prg*2):
bank = 16 + (0x2000 * i)
nmi = rom[bank+0x1FFA] | (rom[bank+0x1FFB]<<8)
rst = rom[bank+0x1FFC] | (rom[bank+0x1FFD]<<8)
irq = rom[bank+0x1FFE] | (rom[bank+0x1FFF]<<8)
print("Vectors bank %02X: %04X, %04X, %04X" % (i,nmi, rst, irq))
print()
mmc5vectors("Metal Slader Glory (Japan).nes")
mmc5vectors("Uchuu Keibitai SDF (J).nes")
```

Last edited by rainwarrior on Tue Jan 10, 2017 12:02 am, edited 2 times in total.

### Re: MMC5, Metal Slader Glory and IRQs

Cool, so the test program can simply select the correct bank before enabling IRQs!