Need help with MM3 PS1 Chip

I have a 5502 model PAL PS1 which I'm trying to mod with a PIC12F629 chip. I'm using a K150 PIC Programmer and Microburn to program the chip and the installation instructions below to install it. I've checked my soldering a number of times, so I'm pretty sure the problem isn't from that, but from something gone wrong with the programming - when I program the chip I get a message stating "The OSCAL value should be in the form of a RETLW instruction [34xx]. Currently [3Fxx]. Do you want this changed?" and I just hit "Yes" and it programmed and verified the chip. The hex file I'm using on the chip is called "MM3eur12f629.HEX".

 

I'm no expert but it seem you are doing everything correct. I really can't see the problem.
You should PM DragoonC who is Assemblers Residential PSX Modchip Expert.

 

Oscal is unique to each chip, you need to read the chip and take note of the existing value (or use software that doesn't overwrite it and leaves it in place)

If you overwrite Oscal, the internal oscillator will be wrong and code won't work right

 

<deleted>

I obviously can't read today

 

Thinking about it, you could set the config to use external oscillator and wire up pin 2 like Mayumi v4 too, as that wouldn't use the internal oscillator and therefore Oscal value doesn't matter

 

Google search turns up this informative page, you should read this for more background about what I said above.

http://picprojects.org.uk/projects/piccal.htm


For setting for external oscillator, goto fuses then set oscillator to 011 (might be referred to as EC). Then reprogram it and wire up pin 2 as per mayumi v4

 

So it may work as is if I wire up pin 2 like this?

Made sure I bookmarked the OSCCAL value page for future reference. Is it only the 12F629 and 12F675 which have individual oscillator settings?

 

link doesnt work, but if its mayumi v4, then sure.

You need to reprogram the config fuses as per my above edit though.

Any issues, take a screenshot of the fuses config screen and come back

 

quite a few. 16f630 does as well off the top of my head

 

I set the fuses as such and reprogrammed it, but no luck:



I may give up on trying to use the 12f629 - been soldering the chip to the underside of my ZIF adapter to reprogram it as I cut off most of the legs for installation and it's too much hassle. Should have some 12c508a chips coming in the post tomorrow anyway.

What chips does Mayumi v4 work with? I've found a hex file for it, but no information on which chips to use.

 

12c50x

What other options are in the oscillator list?

 

Load the mm3eur hex and don't change the fuse.
Read and add the correct osc value and flash.
Try one of these alt power points and wire it in 7 wire mode.

 

List is:

RC CLKGP4 RCGP5
RC IOGP4 RCGP5
INTOSC CLKGP4 IOGP5
INTOSC IOGP4 IOGP5
EC IOGP4 CLKINGP5
HS
XT LP

If I use a 12c508a and Mayumi hex, would this still need to be set to the correct option?

 

Once oscal value is lost, it's lost. You can't just add it


Mayumi v4 hex has option set in the file. No need to change it

 

I figured he might have more than one 12F629.
From what I have tested with the 12F629 you need to connect to 5V to work properly. It will have issues or not work at all using 3.3V.

 

I second that.

Here is a guide i made about a year ago for the DIY'ers using the PRG-019 (MCUmall) and DIY-K series programmers. It should cover everything you need.

http://www.links-protection.com/l=csxWWu6cdZ

 

Awesome. Was looking for something like this online.

 

I've always used the normal points, but add a decoupling cap if any issues

 

This is why people should buy the microchip programmer never had a problem with my good old pic start plus.

 

This isnt related to the programmer. You can wipe the osccal with microchip programmers too.