Expansion board for the CD32

[solidcore]

Originally Posted by alenppc

Except the settings don't match what's on my programmer software... there is no desctiption what IntRC is and anyway it doesn't match the data sheet

Internal clock.

From the data sheet I found:
PIC16F628A has an Internal 4MHz or 48kHz operation, 0 / 1.

bit 3 OSCF: INTOSC Oscillator Frequency bit
1 = 4 MHz typical
0 = 48 kHz typical

Hope it helps mate.

[alenppc]

Ok I think I figured it out, I can post more info later.

Solidcore: it's not internal clock... it doesn't work with that option set

[solidcore]

Sorry all I know mate with the following info on microchip datasheet (PIC16F628A):

INTRC is now called INTOSC.
Timer1 Oscillator is now designed for
32.768 kHz operation. In the PIC16F627/628,
the Timer1 oscillator was designed to run up to
200 kHz.
7. The Dual-Speed Oscillator mode only works in
the INTOSC oscillator mode. In the PIC16F627/
628, the Dual-Speed Oscillator mode worked in
both the INTRC and ER oscillator modes.

[alenppc]

EDIT: removed inaccurate information. The TL866 software has a bug but it allows it to program the PIC. The genius can't program this PIC, no way to set the correct config.

[alenppc]

If anyone can find a way to load kickstart into fast ram, I bet everything will be faster (the cd32 rom is only 16bit)

[Amiga1992]

skick will load kickstart in Fast RAM, I think.
Would have to try though.

[alenppc]

It doesn't support the CD32

[RiotRetroGaming]

Weeeeeey! Thanks Kipper, I'll probably change this wire to a white one now I know it works.

EDIT: These obviously aren't the actual pin numbers, but to make it easy to solder for people, I counted from the pin I chose as number 1 to 11... then soldered to this point.
It was a basta!d to read on the schematics and work out the reverse etc. I'll put this on the wiki.





And a little video...



https://www.dropbox.com/s/j1mrfuyknu...CD32.mp4?raw=1

[RiotRetroGaming]

Now under 'Other:' in the Wiki.

[solidcore]

@bumblebee so by soldering from ide to this pin we will see activity on the cd32 activity led ? Awesome that's interesting I assume the same can be done entirely on the tf328 card itself instead of a permanent marriage of the tf328 and riser .

[Amiga1992]

Originally Posted by alenppc

It doesn't support the CD32

You mean the CD32 ROM? the program itself should run I guess, but someone might have to make a relocation table for a CD32 ROM.

Anyway haven't tried! Probably am talking a load of shit

[amigadude]

Originally Posted by solidcore

@bumblebee so by soldering from ide to this pin we will see activity on the cd32 activity led ? Awesome that's interesting I assume the same can be done entirely on the tf328 card itself instead of a permanent marriage of the tf328 and riser .

Yeah stedy pointed it out earlier http://eab.abime.net/showpost.php?p=...postcount=2659 , all credit to bumblebee for working out which pin on the accessible side of the PCB it was though

[solidcore]

Nice thanks for heading me to the post mate .

[RiotRetroGaming]

Originally Posted by solidcore

@bumblebee so by soldering from ide to this pin we will see activity on the cd32 activity led ? Awesome that's interesting I assume the same can be done entirely on the tf328 card itself instead of a permanent marriage of the tf328 and riser .

I could not find any schematics for the TF328.

I guess I could buzz out the pin from the riser to the TF328 and alter it, but I suppose there is nothing traced to the gold finger is what you are saying.

Do you guys have a link to the A1200 version of the TF328 thread on EAB?

[RiotRetroGaming]

Originally Posted by amigadude

Yeah stedy pointed it out earlier http://eab.abime.net/showpost.php?p=...postcount=2659 , all credit to bumblebee for working out which pin on the accessible side of the PCB it was though

It was a nightmare 😂😂

[plasmab]

Originally Posted by ooBumbleBeeoo

You can, but I could not find any schematics for the TF328.

I guess I could buzz out the pin from the riser to the tf328 and alter it, but I suppose there is nothing traced to the gold finger is what you are saying.

Do you guys have a link to the A1200 version of the TF328 thread on EAB?

The schematics are on the github page. Just download the free version eagle to view them.

https://raw.githubusercontent.com/te...agle/tf328.sch

[RiotRetroGaming]

Originally Posted by plasmab

The schematics are on the github page. Just download the free version eagle to view them.

https://raw.githubusercontent.com/te...agle/tf328.sch

Thanks Steve

EDIT: Installed Eagle, I'll stick to the mod - as I thought there is no trace to link to.

[solidcore]

Originally Posted by ooBumbleBeeoo

Thanks Steve

EDIT: Installed Eagle, I'll stick to the mod - as I thought there is no trace to link to.

Route the ide to the finger if you don't mind soldering it.

[plasmab]

Originally Posted by solidcore

Route the ide to the finger if you don't mind soldering it.

Not sure why this is needed? The TF328 is bare essentials only.

[RiotRetroGaming]

Originally Posted by solidcore

Route the ide to the finger if you don't mind soldering it.

I'm not too keen on that way, I don't have thin enough jumper wire either.
Edu is nearly at the stage of shipping a housing for the riser now, so I'll leave it and wait to cover it.

Thanks guys, just making a Youtube video to help also.
I'll add that to the wiki on the same page.