If you have installed Messiah 2 and it boots everything except DVD-R, would you please supply the following information into this thread or as much of it as possible in this priority order?
- The Actel chip production batch (e.g: 0245)
- The Messiah firmware revision (on the reverse, e.g. 1.08)
- The PS2 version (e.g. v7 PAL; v4 NTSC)
Thanks - we need to properly bottom out the issues associated with this reported aberration.
UPDATE: 23:30 GMT 11-Dec-02 The problem has been isolated. Discussion will have to take place between hDL and Actel regarding this batch (0245) - but at this time it would appear that the chip is not able to operate within its specified voltage range.
The instant fix, for those who are able, is to put a further diode in series with the existing diode to lower the voltage further to enable the Actel chip (in this batch) to operate. This assumes that the track has been cut.
For those who might ask whether or not a lower voltage point can be found - well the answer is yes-ish. Unfortunately the 3.3v point peaks to 3.6v at boot up and that's exactly what's not wanted at that moment. The 2.6v point (if we disclosed it) would require the diode to be shorted and its reliability is also not known; this 2.6v fix also requires you to wait a few seconds when switching the PS2 off before switching it on again so that memory is properly flushed.
The alternative is to return your 0245 Actel based chip, if it doesn't boot DVD-Rs or if you haven't yet used it and can't fit the second diode in series and you will receive a working replacement. There will, of course, be a delay to your originl aspirations.
hDL are keen for their customers to understand that there is no bug on the Messiah 2 (the v6 thing isn't a bug). In this case, the Actel chip is apparently not working within the spec'd voltage range, cause to be determined in conjunction with Actel. The problem is not associated with any side effect from cutting the track.
Production is being ramped up again to deliver Messiah 2 without this voltage problem.
UPDATE: 23:00 GMT 12-Dec-02 hDL have investigated the PSX issue and report that on their test systems with the'fixed' 0245 pcb, PSX games CD-R & original boot 100%. It is likely that Keyscoob (who conducted the consumer test of this fix, reported the PSX issue and who has been consulted in the preparation of this report) may have had an additional problem unrelated to this fix.
UPDATE: 17:30 GMT 14-Dec-02 I have further information on the Actel 0245 batch.
- It is now apparent that only a small proportion of the 0245 batch suffers from the voltage spec variance. These had specific "wafer IDs" orinted on the Actel chip underside.
- It is further apparent that only PROs were programmed into chips from the suspect Actel wafer, amounting to between 1,200 and 2,900 devices.
- These PROS from this Actel wafer will operate properly with the second diode fitted and some production will attract this feature until this wafer is exhausted.
- Actel chips from 0245 batch that are NOT affected by the variance continue to be used in production with a single diode installed on the PCB.
- hDL will test a sample from each tray, in a special rig, prior to programming, to ensure that the Actel chip is to data sheet spec.
The symptom associated with the Actel chip voltage variance is tha DVD-R doesn't boot. In actual fact, what is happening is that the Actel chip isn't initiating correctly during the sequence and so cannot properly recognise the DVD-R.
So whilst you may see Actel 0245 chips in the field, only PROs were affected and those in production now will work properly.