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Post by mrbombermillzy on Dec 3, 2016 16:41:46 GMT
Thats exactly what I have wired up:
Pins 5 + 6 are wired to the 9VAC transformer (brown + cream/off white)
Pin 4 is 5VDC (red coming off the board and white when past the junction box)
Pin 1 and 3 the 2 GND lines are black (going into the junction box to yellow the other side)
Pin 2 is 12vDC (yellow coming off the board and red when on the PSU side of the junction box).
Ive checked and checked. I wouldnt normally post something as trivial as this... I must be missing something!
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Post by mrbombermillzy on Dec 3, 2016 11:50:05 GMT
Well, not really sure exactly how or what you are trying to do, but bear in mind if you use U36 you will only have 1/2MHZ access to the ROM's whereas if you keep the ROMs on the superCPU bus you will have a much faster system (provided your routines are going to be used quite often). Perhaps use U36 as bootstrap code and re vectoring of the C= ROMs and all the Kernal routines into the faster bus ROM chips. If you had the device on the cart port it would make the boot system easier.
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Post by mrbombermillzy on Dec 3, 2016 11:27:01 GMT
I dont remember much from C64 bootup without lookin it up, but wont the W65C816S have the same boot up vector locations as the 6510? I know this may be oversimplyfying things and my memory might not be 100%, but dont you just locate the 'bootstrap' code location and then just change that or re vector to another location that you want to use?
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Post by mrbombermillzy on Dec 3, 2016 9:32:52 GMT
I had a similar idea to re program the ROMs on the Final Chess Cart so that I could use it as a high speed co-processor. However, the SuperCPU is on the expansion port isnt it? I dont suppose there would be much interchangeable code between the two.
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Post by mrbombermillzy on Dec 3, 2016 9:07:50 GMT
Ive been hunting for an SD card so I can take some photos. A picture is worth a thousand words, so they say! So here is the original C= unit: The LED header is on the bottom left of the board. Now, to focus on the output wiring to the mainboard header: The 12 and 5vDC GND lines are together here so Ive kept them together on my wiring too. Notice how the 128D also has the 12VDC lines (for the floppy drive I presume). Heres my wiring of the 12/5VDC PSU and the 9VAC transformer: The brown and cream coloured wires are the 9VAC and the rest go to the 12, 5 and GND of the other PSU. The PSU wires are NOT colour coded as expected. On my donor PSU, yellow is actually GND (connected to black on the mainboard header lead). 12V is red (connected to the yellow of the board header wire. Red is actually 5V). The only dodgy thing on my part is the bridging over the blown fuse on the 12/5V PSU! :s (I know, I know, not a great idea. However, the PSU was fine and the 128D was fine. It should be ok for a quick test with everything wired correctly). As far as I can tell, Ive wired it all up correctly. Like I said, the only questionable issues are: 1.) Does not connecting the LED actually matter? 2.) Does it matter which way round the 9VAC wires are connected? (There isnt really a live and a gnd wire on an alternating current). Thanks for any help and for pointing out if Im being really thick!
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Post by mrbombermillzy on Dec 2, 2016 7:01:08 GMT
I dont have the luxury of any extra 128D PSU's to double check with anymore. The 9vAC for the SID is not essential I suppose. However, I even tried without the 9VAC lines connected, but still the same. Quadruple checked the lines are located correctly. Im pretty sure they are. The only other thing I can think is that on the original PSU board, there is a 2 pin header from the 12V with a resistor in line which connects to the power LED on the front case. This is not being connected as I dont have the resistor plumbed in. I didnt think it would hurt running it without the LED plugged in...?
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Post by mrbombermillzy on Dec 1, 2016 20:17:35 GMT
Again, It's not much use in VICE which doesn't emulate the VDC well at all. This is a real hardware only game. ...except if you hold the fire button of a joystick plugged into port 2 I presume? I think people should really give Pyrofer a round of applause here. Probably the first decent VDC game ever made. AND its VGA compatible! After a failed attempt at getting my 128D running, I will try to test the game on the emulator I have installed at some point. Anyway, WELL DONE!!!
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Post by mrbombermillzy on Dec 1, 2016 20:16:05 GMT
Finally, got some time to make my own version of a C128D PSU, as I have had the poor computer sat in the corner for several months now. Anyway, I managed to scrape together a 12/5VDC switching supply and a separate 9VAC transformer. I put both into the 128D casing and wired up to the motherboard power header. On switching on, the disk drive (or that area) was giving some nasty sounding humming noise, so I immediately switched off. The board was tested with a 'proper' 128D PSU and ran fine. I have the correctly set pinout: 9VAC (2 wires) and the 12v, 5v and 12/5 GND. Am I doing something stupid here?! (I seem to have had a bit of trouble with PSU's lately.) Im pretty sure that it doesnt matter which 9VAC line goes to either of the 9VAC terminals. Apart from that, the 12, the 5 and the DC GND lines are correctly set on the board jumpers.
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Post by mrbombermillzy on Nov 28, 2016 17:55:58 GMT
This sounds like a great idea. Ive been looking (albeit a bit more casually) at a solution for getting data cheaply/efficiently into the 128. I have a XM cable and some 1541's but thats not a solution for the .d71 images or DS C128 disks. Seeing as 1571's are hard/expensive to get over here (UK) and for general ease of swapping back and forth from the PC this could be ideal if it was reasonably priced. Please continue If I can be of any help, just ask. But you already know the extent of my C128 assembly skills.
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Post by mrbombermillzy on Nov 23, 2016 20:57:22 GMT
Thanks Robert. I will check that out.
Always better to have the extra 40 columns of the VDC!
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