Oh joy...PitfallJones wrote:It's.... Christmas and time for another disk mined from the HVSC vaults!
Feast your ears this December on the amazing hits of ABBA!
- PJ

How do I execute a SSD file on a Beeb?...

Greetings, Wim...

Oh joy...PitfallJones wrote:It's.... Christmas and time for another disk mined from the HVSC vaults!
Feast your ears this December on the amazing hits of ABBA!
- PJ
Thanks for the advice...fordp wrote:I just select the Disc using *DIN xx press return. The type *SIDPLAY press return. Some discs have a different executable.
So this won't do?..oss003 wrote:I think you first have to add the SSD image to the MMC file before you can select it with *DIN <nr>
You need a special program to do that.
Greetings
Kees
Oh god! I was listening to Abba for hours while typesetting the HADFS manual back in 1994. Now I've got it playing while typing up my response to a candidate assessment review. (Which I should be doing instead of browsing herePitfallJones wrote:It's.... Christmas and time for another disk mined from the HVSC vaults!
Feast your ears this December on the amazing hits of ABBA!
Code: Select all
$ bbcbasic
PDP11 BBC BASIC IV Version 0.25
(C) Copyright J.G.Harston 1989,2005-2015
>_
Thanks Dave. That is indeed the way I believe I have it configured. I do plan to check those and other things. The trouble is that I am getting home so late these days. Too much work and not enough fun.hoglet wrote:What voltage are you feeding into to the board?
Is this regulated or unregulated?
I have a BeebSID 2.3 board from Phill fitted with a 8580 that works. I fitted a heat sink to the 7805, so it is expected to get hot.
It's just possible what you are seeing is normal.
This is probably stating the obvious, but:
- 6581 needs 5V on VCC (pin 25) and 12V on VDD (pin 28)
- 8580 needs 5V on VCC (pin 25) and 9V on VDD (pin 28)
GND is pin 14.
Have you confirmed these voltages are present (wrt pin 14), both without and with the SID Chip present.
Dave
I am using this. It has the standard small factory fitted heat tab; but nothing 'after-market'. I have not measured the temperature. But the first time I powered it up, it had been on for about two minutes before I momentarily touched it and recoiled. My finger was still sore for about an hour. I think that is more than 59.5°C. I would guess it was over 100°C.hoglet wrote:I just measured the VCC current draw of the 8580 on my BeebSID as 110mA .
If you are feeding the board with 12V, then the 7805 is going to be dissipating 770mW.
The ST L7805 I used has a thermal resistance of 50°C / Watt without a heatsink.
So at 21°C ambient the package would quickly reach temperatures of 21 + 50 * 0.770 = 59.5°C which is very toasty.
What type of 7805 do you have fitted?
Does it have a heatsink?
Dave
You would surprised how hot just 60°C feels!lazarusr wrote:From the datasheet, I see its operating temperature is up to 125°C. I would guess it was either very near or possibly exceeding that.
That current draw is very similar to what I was seeing (~140mA overall)lazarusr wrote:OK. Although it was late, I couldn't resist giving things a try out. All the voltages checkout OK. It draws 20mA without the 8580 and 130mA with it in place. Temperature on the LM7809 was 28°C. The temperature on the LM7805 (after about 15 minutes) had reached 83°C. So not quite as bad as I thought. And...
Excellent stuff, well done for persevering.lazarusr wrote: ...it works![]()