29f800/160 custom ROM

[jbenam]

Originally Posted by kipper2k

Don't forget that i plan for this to be able to load via keypresses, toggle switch or the optical sensor so there options for the night owls.

You really think of everything, huh

Great job with this

[Knight2011]

Originally Posted by kipper2k

Haha if you smoke, just draw on the cigarette at the appropriate time . Don't forget that i plan for this to be able to load via keypresses, toggle switch or the optical sensor so there options for the night owls.

@Knight2011,

What do you think would be an appropriate way to activate a reed switch, i know there are lots of different types of reed switches.

I was just thinking about the simplest reed switch: with a magnet close to it = short circuit (and of course open circuit without magnet). This requires nothing around, it's like a push button. And when there's a short circuit, the board switches ROM, if not it remains on the last ROM selected.

[Vot]

Originally Posted by Knight2011

I was just thinking about the simplest reed switch: with a magnet close to it = short circuit (and of course open circuit without magnet). This requires nothing around, it's like a push button. And when there's a short circuit, the board switches ROM, if not it remains on the last ROM selected.

I dont get it whats wrong with the holding reset to switch. You have to reboot to change kickstart anyway.

[Knight2011]

Originally Posted by Vot

I dont get it whats wrong with the holding reset to switch. You have to reboot to change kickstart anyway.

Yes that's a good idea, and since there's a buzzer on the board you just wait for the beep (unless a mod is implemented and played each time )

[kipper2k]

Here is the A1200 with a 1mb rom set up to boot either KS1.3 or KS3.1. the small board contains the actual photocell. High light = KS1.3 and low light = KS3.1. Works like a charm. Here's a picture. I added LEDs because... because... i like LEDs




and here is a link to see the same picture supersized


I still have to add the PIC chip and program it.

[SpeedGeek]

Since the Rev. 10 release of Romy I've been considering possible uses for the new free I/O pin. One possible use was to generate a /WE signal to support flash memory writes for A3000/A4000 owners using Flash memory adapters (are there any?).

This would require connecting a jumper wire from the Romy adapter to the Flash memory adapters. However, I would strongly recommend a jumper or switch to disconnect the /WE signal from the Flash memory adapters.

If there's enough interest in doing this let me know here or on Amibay.

[kipper2k]

Originally Posted by SpeedGeek

Since the Rev. 10 release of Romy I've been considering possible uses for the new free I/O pin. One possible use was to generate a /WE signal to support flash memory writes for A3000/A4000 owners using Flash memory adapters (are there any?).

This would require connecting a jumper wire from the Romy adapter to the Flash memory adapters. However, I would strongly recommend a jumper or switch to disconnect the /WE signal from the Flash memory adapters.

If there enough interest in doing this let me know here or on Amibay.

All signals are available on the Rom board so i guess in system programming is definately (probably doable.

I was able to get the 29f160-90 2mb chips booting 4 images. So i don't really know why the other ones gave me problems

[kipper2k]

Here is the A1200 dual image flashrom set up and working on the Amiga 1200. Many thanks to Yulquen74 for his design and help making this a reality. No external wires etc are required to make this method work

this specific flashrom contains KS1.3 and KS3.1 on a 1mb flash rom. up to 4 images can be supported by Yulquen74's code. Images are chosen by holding down CTRL A A and cycling through available images. There is still a little bit of testing to do for this specific method but the computer can still be booted using switch etc.



The Piezo buzzer is actually on the underside of the board so it doesn't interfere with the case closing on the A1200. The white jumper wire shows the wrong info posted on Amigawiki showing A0 on pin10 in their a600 schematic when it should be pin 9! Doh!!

here is supersized image

[Vot]

Originally Posted by kipper2k

Here is the A1200 dual image flashrom set up and working on the Amiga 1200. Many thanks to Yulquen74 for his design and help making this a reality. No external wires etc are required to make this method work

this specific flashrom contains KS1.3 and KS3.1 on a 1mb flash rom. up to 4 images can be supported by Yulquen74's code. Images are chosen by holding down CTRL A A and cycling through available images. There is still a little bit of testing to do for this specific method but the computer can still be booted using switch etc.



The Piezo buzzer is actually on the underside of the board so it doesn't interfere with the case closing on the A1200. The white jumper wire shows the wrong info posted on Amigawiki showing A0 on pin10 in their a600 schematic when it should be pin 9! Doh!!

here is supersized image

Good work

[mech]

Originally Posted by kipper2k

Here is the A1200 dual image flashrom set up and working on the Amiga 1200. Many thanks to Yulquen74 for his design and help making this a reality. No external wires etc are required to make this method work

this specific flashrom contains KS1.3 and KS3.1 on a 1mb flash rom. up to 4 images can be supported by Yulquen74's code. Images are chosen by holding down CTRL A A and cycling through available images. There is still a little bit of testing to do for this specific method but the computer can still be booted using switch etc.



The Piezo buzzer is actually on the underside of the board so it doesn't interfere with the case closing on the A1200. The white jumper wire shows the wrong info posted on Amigawiki showing A0 on pin10 in their a600 schematic when it should be pin 9! Doh!!

here is supersized image

Very cool device!

[MoreBITS]

This is awesome

[dirkies]

any news on this Kipper2k? Got my hand on my wallet to be honest

[kipper2k]

The eproms using the 29f800 are stable, i just designed and ordered a new board version that will allow you to use a programmable 29f800 KS3.1 in the Rev3 & 5 A500 without the hassle of wires. it is capable of working in all amigas and all kickstarts. this is achievable by opening/closing the 3 solderable jumpers

[Vot]

Originally Posted by kipper2k

The eproms using the 29f800 are stable, i just designed and ordered a new board version that will allow you to use a programmable 29f800 KS3.1 in the Rev3 & 5 A500 without the hassle of wires. it is capable of working in all amigas and all kickstarts. this is achievable by opening/closing the 3 solderable jumpers

Nice layout on that..

[dirkies]

Good this project advances in its final stages!
Too bad the 2MB chip did not make it in the final design, 1.2/1.3/2.05/3.9 would have been awesome, but no point if it is unstable

I'll keep an eye on this thread when it is for sale!

[kipper2k]

Originally Posted by dirkies

Good this project advances in its final stages!
Too bad the 2MB chip did not make it in the final design, 1.2/1.3/2.05/3.9 would have been awesome, but no point if it is unstable

I'll keep an eye on this thread when it is for sale!

the 2mb chip is capable in that design I haven't give up on it yet

[dirkies]

Ok, so do I smell here a two-editions release: 1MB 2xKS and 2MB 4xKS ? (drool)

[kipper2k]

The way i designed it is the 4 pin header can control the 4 kickstart 2mb eprom, the 3 pin header controls the 2 kickstart 1mb eprom.

for Amiga mobo version support....

Rev 3/5 - open JPR 1 - close JPR 2 - close JPR 3

Rev 6a - close JPR 1 - open JPR 2 - open JPR 3 (and all other Amigas)

[fryguy]

A bit OT:

Would it be possible to put a (small) game in ROM ?

I guess one has to fit both the actual kick.rom and the game in the ROM though. And i suppose the game needs to be in a "romable" format.

[Jope]

If you code the game to run from ROM, then yes. If you were going to install some disk loader game in there, then find something that loads everything into RAM at once, does not call OS ROM routines at all, then have your custom ROM copy it to RAM and jump into it. ;-)