Author Topic: 128 Function ROM (Read 23392 times)

Andrew Wiskow · « **Reply #50 on:** March 12, 2009, 03:37 AM »

Quote from: megabit on March 12, 2009, 02:11 AM

Okay, Dan... You've piqued my curiosity... What byte do you change in the Kernal of your 128s?

SmallCleverDinosaur · « **Reply #51 on:** March 12, 2009, 04:41 AM »

Quote from: megabit on March 12, 2009, 02:11 AM

Robert, if you will send me your EPROMs, I will re-program them for you, as well as DLH, airship and SmallCleverDinosaur and I willl send them back to you.

To make things easier for both of us, just burn a new EPROM and send me that one, and I will transfer the cost of the EPROM to you. I can always use an extra EPROM

Quote from: Andrew Wiskow on March 12, 2009, 03:37 AM

Quote from: megabit on March 12, 2009, 02:11 AM

Okay, Dan... You've piqued my curiosity... What byte do you change in the Kernal of your 128s?

Yes please, tell us Dan, I got really curious about that one too!

megabit · « **Reply #52 on:** March 12, 2009, 05:30 AM »

Quote

Okay, Dan... You've piqued my curiosity... What byte do you change in the Kernal of your 128s?

It will have to wait, my wife just called me to lunch.

Dan..

Alex · « **Reply #53 on:** March 12, 2009, 08:06 AM »

Quote from: megabit on March 12, 2009, 05:30 AM

Quote
Okay, Dan... You've piqued my curiosity... What byte do you change in the Kernal of your 128s?

It will have to wait, my wife just called me to lunch.

Dan..

Come on - finish your lunch quickly! I'm also dyeing to learn which byte is it... BTW: do you still take orders for the adapter? I'm very interesting in getting one for my C128D.
Cheers
Alex

megabit · « **Reply #54 on:** March 12, 2009, 08:36 AM »

Quote

Okay, Dan... You've piqued my curiosity... What byte do you change in the Kernal of your 128s?

Quote

It sounds like Option 1 would be the way to go. Where on the adapter would you solder that reset wire?

Quote

BTW: do you still take orders for the adapter? I'm very interesting in getting one for my C128D.

I'm putting together 20 units now and will have them finished this weekend. It looks like I will have to make more than 20. There's alot of interest in the adapter.

Dan...

Andrew Wiskow · « **Reply #55 on:** March 12, 2009, 09:07 AM »

Quote from: megabit on March 12, 2009, 08:36 AM

I'm putting together 20 units now and will have them finished this weekend. It looks like I will have to make more than 20. There's alot of interest in the adapter.

I'm definately interested, too... I'm just waiting for all of the bugs to get worked out first.

al · « **Reply #56 on:** March 13, 2009, 08:57 PM »

I hope my name is on the waiting list.

megabit · « **Reply #57 on:** March 13, 2009, 09:50 PM »

megabit · « **Reply #58 on:** March 15, 2009, 04:49 AM »

Blacklord · « **Reply #59 on:** March 15, 2009, 05:50 AM »

Dan,

Work out for Oz please & I'll Paypal you the cash.

cheers,

Lance

SmallCleverDinosaur · « **Reply #60 on:** March 19, 2009, 07:28 PM »

Quote from: megabit on March 12, 2009, 02:11 AM

Quote
6. A surprise... the ZED 128 text editor is included. Another surprise... ZED 128 initializes correctly from the 128 ROM adapter, but when a user tries to type more than one character into the program, the whole program freezes up.

I received my new EPROM yesterday, thanks Dan!

dabone · « **Reply #61 on:** March 20, 2009, 08:33 AM »

Off topic but the autoboot disable you were talking about...

Quote

After the routine checks the Internal ROM and Cartridge area, it clears the interrupt (CLI) and then checks for an auto boot. What I do is change the CLI to an RTS. It never reaches the auto boot area, instead it will return to Basic where the routine was called. The very next command is JMP $401C, guess what, the next command at $401C is CLI, then it prints the READY prompt.

Exactly what byte is it to change to do this?

Thanks,
Later,
dabone

megabit · « **Reply #62 on:** March 20, 2009, 10:04 AM »

Quote

Exactly what byte is it to change to do this?

dabone · « **Reply #63 on:** March 20, 2009, 12:13 PM »

And the dummy with the hex editor that knows nothing about ml code?
CLI=58

RTS=???

Thanks,
dabone

SmallCleverDinosaur · « **Reply #64 on:** March 20, 2009, 05:10 PM »

To find out the hex code of RTS (or of any ML op-code), enter the monitor and type

A1300 RTS

Then the monitor will show

A 01300 60 RTS

The "A" is for assemble and that's what just happened. You assembled the op-code RTS into ML. And the monitor responds by showing the hex code for RTS which is 60.

dabone · « **Reply #65 on:** March 20, 2009, 11:29 PM »

Thanks.

Later,
dabone

al · « **Reply #66 on:** March 21, 2009, 09:54 AM »

The Megabit 128 adaptor came in today. What a nice production it is. Very well done. Nice install docs, CDROM. Well made and pretty at that.

Big thanks.

megabit · « **Reply #67 on:** March 21, 2009, 10:30 AM »

Quote

The Megabit 128 adaptor came in today. What a nice production it is. Very well done. Nice install docs, CDROM. Well made and pretty at that.

Big thanks.

Thank you for the nice words.
I'm glad you like it.
Enjoy.

Dan...

RobertB · « **Reply #68 on:** March 21, 2009, 03:37 PM »

Quote from: al on March 21, 2009, 09:54 AM

What a nice production it is. Very well done. Nice install docs, CDROM. Well made and pretty at that.

I agree. On Saturday I show it off at the TOGA meeting in San Jose.

Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
The Other Group of Amigoids
http://www.calweb.com/~rabel1/
Southern California Commodore/Amiga Network
http://www.sccaners.org/

megabit · « **Reply #69 on:** March 21, 2009, 04:18 PM »

RobertB · « **Reply #70 on:** March 22, 2009, 06:53 PM »

Quote from: megabit on March 21, 2009, 04:18 PM

Good advice. However, in my case, Ray Carlsen removed every chip in my main C128DCR and put in sockets for the ones that had been previously soldered in. Then he re-inserted all the chips. In other words, I now have a fully-socketed C128DCR. So, maybe my C128DCR just has a few years of "corrosion" now.

Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
Notacon 6 / Blockparty 3 on April 16-19
http://www.notacon.org , http://www.demoparty.us

megabit · « **Reply #71 on:** March 22, 2009, 07:44 PM »

Quote

However, in my case, Ray Carlsen removed every chip in my main C128DCR and put in sockets for the ones that had been previously soldered in. Then he re-inserted all the chips. In other words, I now have a fully-socketed C128DCR.

Is there a good reason for that?
Ray must have alot of time on his hands.

Dan...

RobertB · « **Reply #72 on:** March 22, 2009, 08:06 PM »

Quote from: megabit on March 22, 2009, 07:44 PM

Is there a good reason for that? Ray must have alot of time on his hands.

I'm trying to remember the exact circumstances. IIRC, the computer was not coming up with the correct free memory, 80-columns was not working, loading from disk was not working correctly but C64 programs on cart would work. He had it for a long time, trying to debug it. When the easy answers were not found, then he went with chip by chip replacement (hence, all the sockets). He finally traced it to the cartridge expansion port! Two "teeth" in the port were crossed/short-circuiting. He replaced the port, and all the problems were solved.

His and my e-mails about this are
archived somewhere,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
Notacon 6 / Blockparty 3 on April 16-19
http://www.notacon.org , http://www.demoparty.us

RobertB · « **Reply #73 on:** March 23, 2009, 03:08 PM »

Quote from: me on March 21, 2009, 03:37 PM

On Saturday I show it off at the TOGA meeting in San Jose.

While showing it off at the meeting, I realized that with the word/text processors, spreadsheet, database, and file utilities put into a fully-optioned Megabit ROM Adapter, it would make a C128 a complete business machine right "out of the box". All it needs is a game or two (80-column or 40-column) for when a person is not doing business.

For instance, those Genie C128 game files at

http://cbmfiles.com/genie/C128GamesListing.html

Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
Notacon 6 / Blockparty 3 on April 16-19
http://www.notacon.org , http://www.demoparty.us

megabit · « **Reply #74 on:** March 23, 2009, 05:25 PM »

Quote

All it needs is a game or two (80-column or 40-column) for when a person is not doing business.