Re: ROM IC24 Acorn Atom #A000-#AFFF

[janvb]

My 40 year old atom is alive now. Next thing to do is putting some real programs in it.
Since i don't got any backup of old software, decided to download the archive from this forum and stumbled upon toolkit rom's .
Had to fit one in my atom, the Disatom Super Rom. Found some old 2532 Eprom's in my spare parts box.
In combination with an Arduino and SDcard reader for the hexfile, tried to program the Eprom's . With no succes.
Next step is to use an EEprom. For an earlier project i had some 28c64 eeproms lying around.
Programmed this one and connected it to the IC24 socket.

eeprom connected to slot ic24

And the result you can see below.

Toolkit in action

The disassembler in action .

To be continued.

Jan

[janrinze]

Nice looking setup!

[oss003]

Nice job Jan ...

[Multiwizard]

What they said...

[highfell]

Can yo7 send me a link to the Rom image and how did you load it into the EPROM. I am trying to do the same thing but I think my only method will be to load it via a .wav file that I need to create from the rom image

[IanS]

Can yo7 send me a link to the Rom image and how did you load it into the EPROM. I am trying to do the same thing but I think my only method will be to load it via a .wav file that I need to create from the rom image

I guess it came from the Atom Archive - viewtopic.php?p=63714#p63714
Adapting eproms to fit in Atom's is quite common - http://www.beebmaster.co.uk/Shows/Bolto ... 5-122.html

[janvb]

Can yo7 send me a link to the Rom image and how did you load it into the EPROM. I am trying to do the same thing but I think my only method will be to load it via a .wav file that I need to create from the rom image

I can make a wav file from it and post it here later.
Only way to load files into my atom at the moment for me are also wav files.

Jan

[highfell]

I can make a wav file from it and post it here later.
Only way to load files into my atom at the moment for me are also wav files.

Jan

That would be great thanks. What tools will you use? I have downloaded ATM2WAV but using that you would need to convert the ROM image to a ATM file which I don't think is possible ?

Trying to find ATM files themselves isn't easy !

[roland]

Hi Jan,

If you want some 2532 programmed, I still have a programmer that can handle them. Just let me know if you want so.

Greetings,
Roland

[janvb]

Hi Jan,

If you want some 2532 programmed, I still have a programmer that can handle them. Just let me know if you want so.

Greetings,
Roland

Hi Roland,

Would be nice to have the toolbox in a 2532. (But iam afraid the eeproms are corrupt).
You don't happen to be an owner of a 2532 who is willing to burn that rom .
I pay the costs.
Since Corona is wandering around, we don't want to leave our homes.
Post still works i believe.

Greetings,

Jan

[janvb]

Nice job Jan ...

Thanks,

I realy enjoy digging into this machine.

[janvb]

My 40 year old atom is alive now. Next thing to do is putting some real programs in it.
Since i don't got any backup of old software, decided to download the archive from this forum and stumbled upon toolkit rom's .
Had to fit one in my atom, the Disatom Super Rom. Found some old 2532 Eprom's in my spare parts box.
In combination with an Arduino and SDcard reader for the hexfile, tried to program the Eprom's . With no succes.
Next step is to use an EEprom. For an earlier project i had some 28c64 eeproms lying around.
Programmed this one and connected it to the IC24 socket.
eeprom.jpg
And the result you can see below.
toolbox.jpg
The disassembler in action .

To be continued.

Jan

For any who is interested in this ( i thought its been done many times in the past) iam willing to describe this project more in detail.

Jan

[roland]

You don't happen to be an owner of a 2532 who is willing to burn that rom .
I pay the costs.
Since Corona is wandering around, we don't want to leave our homes.

O yes, I am a happy owner of a few 2532's So I can burn one or two for you. I understand that you are anxious about leaving your home. Since I am still young and healthy I get out of my house when I want to. I'll send you an email - since you have a notmail account please check your spambox....

Post still works i believe.

Yes, that still works. Today I received a few blue envelopes from "Belastingdienst"

[bprosman]

Yes, that still works. Today I received a few blue envelopes from "Belastingdienst"

Forgot to suspend your membership ?

[janvb]

I can make a wav file from it and post it here later.
Only way to load files into my atom at the moment for me are also wav files.

Jan

That would be great thanks. What tools will you use? I have downloaded ATM2WAV but using that you would need to convert the ROM image to a ATM file which I don't think is possible ?

Trying to find ATM files themselves isn't easy !

Hi,

Today I made a copy of the Rom with :
*SAVE "7049" A000 AFFF to tape
I recorded this on my windows PC with the voicerecorder program.

7049.wma

(2.61 MiB) Downloaded 32 times

Short discription of how i accomplished this all.
1: Copied 7049 file to an sd card.
2: Wrote an arduino program to read data from the sd cart and convert it into asccii code.
3: Copied the ascii code output from arduino into eeprom programmer program.
4: Programmed a 28c64 eeprom.
5: connected the 28pins eeprom to the ic24 socket( 24pins) with breadboard cables

For completion i add the arduino file + 7049 file to this little story .

7049.7z

(3.35 KiB) Downloaded 25 times

ReadFileROM.7z

(1.27 KiB) Downloaded 25 times

PS I renamed 7049 into "HexDump" for loading into arduino program.

Programming an 2532 with arduino mega didn't succeed.
Mybe due to corrupt eproms.

Gr.

Jan

[highfell]

Cool - & thanks.

I'll see if i can load it into my Atom

[bprosman]

Why this way and not using the IC24 dumps that are available in the archives or do I miss something ?

[janvb]

Why this way and not using the IC24 dumps that are available in the archives or do I miss something ?

Hi,

Because i don't got any way of loading software into my Acorn except for the cassette input.
To program an eprom , you need an eprom programmer for the 2532, wich i don't have.
So this is my way to do some stuff with the Acorn.
Iam sure its not the most efficient way to do so.
But i enjoy it .

Gr.

Jan

[Volhout]

Ha Jan,

That is how I remember it. !!!
You have to build an eprom programmer, before you can go to the next level.
Program the ROM from BASIC, I was happy to have a 12k machine, so basic program and the 4k image could fit in RAM.
Those where the days.....

My first ROM was P-Charme.

Good memories...

Volhout

[highfell]

Cool - & thanks.

I'll see if i can load it into my Atom

Had to get the volume level correct on my IPad. I had it too high. Missed the sound of beeps like I used to hear on the cassette recorder but felt the same level of excitement once the cursor came back to indicate the program had loaded !

And above is the proof showing the command set of DisAtom, even if upside down ! Thanks for sending it.

Now to find some Bug-Byte Invaders and Galatian .wav etc. files

[janvb]

Cool - & thanks.

I'll see if i can load it into my Atom

Had to get the volume level correct on my IPad. I had it too high. Missed the sound of beeps like I used to hear on the cassette recorder but felt the same level of excitement once the cursor came back to indicate the program had loaded !

35D5F725-43A6-43B0-B8D8-41592D8BC4C9.jpeg

And above is the proof showing the command set of DisAtom, even if upside down ! Thanks for sending it.

Now to find some Bug-Byte Invaders and Galatian .wav etc. files

Nice you could load the file.
Iam now busy with developing a loading program for the 6522 parallel port.
Dit some hardware tests, see pic below, wich look promising .

In combination with arduino i can send and receive parallel data to and from acorn atom.
With 32k RAM installed i can fiddle around with the data and also store them back as wav files.
This is also to be continued.

Gr.

Jan

[roland]

WOW .... loading programs from leds .... cool

[janvb]

WOW .... loading programs from leds .... cool

This is a very very sofisticated technic Roland wich i dont realy understand yet

[janvb]

As mentioned before, tried to load a program into the acorn atom via the parallelport.
To do this i had to shortcut IC50 , see pic below.

Idea was to put 8 bit in parallel to port A. Handshake with ca1 and ca2 from the 6522 VIA.
Back in the days i had no clue how this device worked, and it seems neither do i know now .
After a whole lot of issues with the handshake lines I decided to do it with 4 bit in parallel and use bit 4 and 5 from port A to do the handshake. Then first store the LS Nibble in #90, load the MS Nibble , do 4 times a ROL, CLC and ADC#90 to get the original 8 bits loaded. Data is read by an SD-card and send in nibbles with an arduino UNO. I used the ATM file format developed by Wouter Ras.
After removing all the bugs and nasty thingies I succeeded to load a program into my acorn.

And another one, with i played many times back in the days.

Ah those bring back sweet memories .
But opening the game didn’t.

Seems i have some videoram issues.
To be continued,

Gr.
Jan

[roland]

Nice work Jan!

You could also use the A-port on the large PL6/7 connector, that would have saved you the shortcuts of IC50. You can also use the A-port for 8 bit in and the B-port for 8 bit out, completely with handshake. I did that in my Atom-in-PC, so hardware and software examples are available. And it makes the transfer much faster

I assume the next step is writing some kind of ROM that replaces the AtoMMC ROM or DOSROM

[janvb]

Hi Roland,

Thanks for the comment.
The reason i made a 4 bit parallel connection to the parallel port is:
1 - I don't intend to use it anymore for connecting to a printer or any other parallel device, except my own stuff .
2- Since I am a mechanical engineer and not an ICT specialist i do al things the noob way
3- I don’t really understand the working of the 6522, so I mostly try to do it in a way I can understand it myself.

Next step will be the video ram.
Then some intelligent program in the arduino to choose from a game stored on sd breakoutboard.
Next saving a program from atom to arduino, (cassette is realy to slow), atom pack i can't use because of the 32k ram.
Developing a copy of the AtomMcc rom is a far from the bed story for me.

I do hope that my little stories help some other people, giving the fact that there are more peeps out there who are like me .

Have a nice evening.

Gr.

Jan

[roland]

I don't think that you're a noob because you manage to make an Arduino read a file from an sd card and send it to your Atom. I neverever touched an Arduino and I wouldn't know how to read a file. And people call me an ICT specialist (but that's their fault ).

Since you managed to transfer a file via the 6522 I am quite sure that you do understand the basics of this component so go ahead and go on with more projects.

About the drive, you can do some hardware mods on your disc controoler board so that it moves to the #BC48 address space. If you want to, we can have a look later .... after the corona crisis during one of our meetings.

About the video ram, did you already clean up all the pins of the involved ic's?