128 Function ROM

SmallCleverDinosaur · March 23, 2009, 07:03 PM

Quote from: megabit on March 23, 2009, 05:25 PM
I have made a Cartridge for the C64 that will use the same EPROMs.

That sounds interesting

How have you solved the bank switching between the banks of the EPROM? Using one of the expansion ports I/O areas and a flip-flop IC perhaps?

Would it work with the C128 (in C128 mode)? I.e is the EXROM line directly grounded on the PCB or does it pass through a switch?

megabit · March 23, 2009, 08:18 PM

QuoteUsing one of the expansion ports I/O areas and a flip-flop IC perhaps?

Yes.

QuoteWould it work with the C128 (in C128 mode)? I.e is the EXROM line directly grounded on the PCB or does it pass through a switch?

It does not work in C128 mode. Plug it in and turn on the computer, it will go directly to C64 mode and a menu. From there you can select any one of the programs or go to basic.

Dan...

SmallCleverDinosaur · March 23, 2009, 08:44 PM

Have you designed the PCB yourself? If so, why don't you add a switch to the EXROM line (and the GAME line if the cartridge supports 16K ROM-images)?

Then it can be used in C128 mode too with a slightly modified code for the menu

megabit · March 23, 2009, 09:44 PM

QuoteHave you designed the PCB yourself? If so, why don't you add a switch to the EXROM line (and the GAME line if the cartridge supports 16K ROM-images)?

Then it can be used in C128 mode too with a slightly modified code for the menu

The Internal ROM Adapter will work with 128 programs as well as C64 programs and will not tie up the expansion port.

The C64 cartridge will work with 8K programs, 16K programs, single file programs any size that will fit in RAM, multi-file programs if you modify them and it will switch itself off so you can run from the basic prompt.

The only external switch is a system reset to regain control of the cartridge.

Dan...

RobertB · March 24, 2009, 04:27 AM

Quote from: megabit on March 23, 2009, 05:25 PMHow about something for your secretary to do between work, like Solitaire. Something for you, like Leader Board Golf.

Now you're talking!

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

Andrew Wiskow · March 24, 2009, 04:35 PM

Quote from: RobertB on March 24, 2009, 04:27 AM
Quote from: megabit on March 23, 2009, 05:25 PMHow about something for your secretary to do between work, like Solitaire. Something for you, like Leader Board Golf.
Now you're talking!

Funny, Robert... I would've sworn that you would've insisted on a Star Trek game...

airship · March 25, 2009, 12:42 AM

Andrew, Star Trek is not a game... it's a way of life!

RobertB · March 25, 2009, 04:14 AM

Quote from: Andrew Wiskow on March 24, 2009, 04:35 PMFunny, Robert... I would've sworn that you would've insisted on a Star Trek game...

Ah, I haven't found a good C128 80-column Star Trek game. There is the tried-and-true C64 Star Trek: Space Operations Simulator.

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

RobertB · March 25, 2009, 04:16 AM

Quote from: airship on March 25, 2009, 12:42 AM...Star Trek is not a game... it's a way of life!

Well said!

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

dabone · March 25, 2009, 01:54 PM

Got mine today.
It wasn't what I expected. When I first asked about it it was 16 or 32k version only.
So I open the package, glanced at the directions, popped open the 128 and tossed it in.
(Flat 128 with 64k VDC upgrade)
Imagine my suprise when I press f1 and get 3 pages of selections!
Very nice job.. Great looking product and dead simple to install.
(I put my shield back in, It's a little bowed, but it helps hold the uiec/sd.)

I would ask that you post how to redefine which function key the rom redefines.
(Yeah, I'm running jiffy dos also). It would be nice to put it on either f2 or f8 for me.

Thanks for the cool new upgrade.
(The wife still doesn't understand what I'm doing with the antique in the corner)

Later,
dabone

SmallCleverDinosaur · March 25, 2009, 06:05 PM

Quote from: RobertB on March 25, 2009, 04:16 AM
Quote from: airship on March 25, 2009, 12:42 AM...Star Trek is not a game... it's a way of life!
Well said!

Very well said I'd like to add

Waiting for the upcoming release

Blacklord · March 26, 2009, 12:05 AM

Quote from: dabone on March 25, 2009, 01:54 PM

(The wife still doesn't understand what I'm doing with the antique in the corner)

You could trade her in then

dabone · March 26, 2009, 12:26 AM

QuoteYou could trade her in then

The last time I did that it got REAL expensive.

Later,
dabone

radrick · April 06, 2009, 10:20 PM

How can I order one?
payPal?
R

Quote from: megabit on February 13, 2009, 06:24 AM
I have a new piece of hardware for the 128 Internal ROM Socket. It uses the high capacity EPROMs (27010 1meg, 27020 2meg, 27040 4meg and 27080 8meg).

It comes in a 16k version ($8000 to $BFFF) for a maximum no. of 64 pages or 32k version ($8000 to $FFFF) for a maximum no. of 32 pages.

I need to know if there's an interest for this adapter before I invest anymore time and money on it.

I have a 16k version that has a 4meg EPROM full of programs that I use on my C128 and 128DCR.
Here is a list of the programs:

Merlin 128 v1.0 Promos 2.0
My Disk Editor Function keys
Viza Write 128 Viza Star 128
Seq Reader 128 Begin & End Adrs
Fastrac File copy Directory Editor
Color 80 column Basic Data Maker
Monitor 64 Basic Merge
Basic Merge + Maverick File Copy
Maverick Track Editor Single 41 Data copy
Dual 41 Data Copy Single Nybbler
Dual Nybbler Single 81 Data copy
Maverick File Tracer Maverick Track & Sector Editor
64K VDC RAM Test REU Test

I have a 32k version that has a 1meg EPROM with Key Dos, Servant and Basic 8 installed.

I have sent the adapters to airship hoping he would write a review on it. I would happy to answer any questions you might have, but I would like to wait until airship has written his review.

Dan...

megabit · April 07, 2009, 05:57 AM

QuoteHow can I order one?
payPal?
R

Send me an email with your country and I'll send you a quote.

Dan...

newbury@planetkc.com

RobertB · April 08, 2009, 10:13 AM

After Murphy's Law struck at MossyCon 5, I finally demoed the Megabit 128 ROM adapter. Whew!

But it worked at home...

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 · April 22, 2009, 06:36 AM

Along with the uIEC, SD2IEC, Behr-Bonz VIC-20 Multicart, Cynthcart v1.2.4, I had the Megabit 128 ROM adapter on display at the Commodore table in the games room of last weekend's Notacon/Blockparty (photos and video to come later). Many attendees were curious about the uIEC and SD2IEC, less for the Behr-Bonz VIC-20 Multicart, and even less so on the Cynthcart and 128 ROM adapter. I gave it my best shot... I tried to explain each device in detail to each attendee who asked.
I had brought all of the C= equipment -- NTSC/PAL flatscreen monitor/t.v. (courtesy of Larry Anderson), 1571 drive, C64 with JiffyDOS, VIC-20 with JiffyDOS, 2 heavy-duty power supplies, 3 boxes of disks, 3 joysticks, one NTSC C64 DTV, and one PAL C64 DTV. One big suitcase was crammed with most of the equipment, barely passing the airline requirements of under 50 pounds. I had to put the rest of the smaller items and cables in my carry-on case and even camera case.
If only I had brought a C128... then I could have properly demonstrated the 128 ROM adapter. Jim Mazurek of the Chicago SWRAP Commodore Computer Club met with me again this year, helped me immensely in gettng the equipment up and running, and even said that if there were Commodore for Notacon/Blockparty next year, he would bring the heavy C= stuff instead of my having to lug the equipment all the way from California!
On the evaluation form for Notacon/Blockparty, in the question for what you'd like to see at the event, I wrote, "More Commodore".

Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
July 25-26 CommVEx v5 - http://www.commodore.ca/forum and click on ComVEX

RobertB · May 01, 2009, 03:15 PM

Ah, that's good that you figured it out. I was paging through my Basic 8 manual, trying to figure out what your problem was.

Time to put the Patech binder back on the shelf,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
July 25-26 Commodore Vegas Expo - http://www.commodore.ca/forum
and click on ComVEX

maraud · September 09, 2009, 01:27 PM

Just got my hands on one of these, and all I can say is WOW!!!

I now have all the great ROM functionality (plus some great non-ROM apps) I always wanted without any limitations..... ie, Servant always "buggin me" when I didn't need it!

Mark Smith · November 26, 2009, 03:25 PM

Just resurrecting this thread ... seems all of the posts by Megabit have gone ?!?

Where can you buy these ROM adapters ?

Mark

RobertB · November 26, 2009, 06:39 PM

Quote from: Mark Smith on November 26, 2009, 03:25 PMWhere can you buy these ROM adapters ?

From Megabit here on the forum.

Send him a message,
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

128 Function ROM

radrick