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2004-04-09 12:03

Clarence

Registered: Mar 2004
Posts: 121

p4 - c64 crossassembling

Hi everybody!

I'm looking for a program to transfer c64 object files from my pc to the c64 ram directly. For the phisical link I want to use the XA1541 cable I use for StarCommander.

I want to use a p4 with win2000 (and trying to avoid using dos).

On the net I found a similar program called comlink which is a transfer program (it's last version from 1999) but that uses the older x1541 cable for the transferring which doesn't work with my p4's newer (epp-ecp) paralell port.

Maybe some of you have already solved this problem and can help me?

Thanx in advance,
Clarence

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2004-04-14 12:55

Clarence

Registered: Mar 2004
Posts: 121

Quote: RS232 will work under *any* OS, which is why I haven't bothered with the x*1541 cables.

I've got an old Omnitronix user port adapter, but an equivalent is dirt simple to build: http://www.petscii.com/ Over5 is good for this interface: http://www.kahlin.net/daniel/over5/

There's also Swiftlink (discontinued) and Turbo232 (replaced the Swiftlink) from CMD, which have a real UART which offloads the bit encoding from the CPU. They're around $35-$40 new. There's also some other cartridges with UARTs, but I don't know too much about them (road runner, IDE64 modules, etc). Serial Slave works with this setup: http://www.cling.gu.se/~cl3polof/serslave/

White Flame!
Thanks for the reply. Now I have enough informations to choose a solution.
RS232 being opsys independant sounds great. One more question:

Does the c128 have a built in rs232 interface? Maybe it's easier to track down and buy a c128 than build the above or get one of the mentioned cartridges... :)

Clarence

2004-04-14 19:12

White Flame

Registered: Sep 2002
Posts: 136

There's no extra RS232 on the C128. It has the exact same ports as the 64, except the reset button, RGB video, and different power supply.

2004-04-16 10:32

Clarence

Registered: Mar 2004
Posts: 121

Hi!

I built the basic rs232 cable described at http://www.petscii.com but it soesn't seem to work. At least I can't transfer with over5 the boot file....

The cable should be ok, now I suspect that my user port is bad/damaged (my c64 was in service 8 years ago and don't remember what was made with it). Is there any easy way to test my user port? Which IC should I replace if it appears to be bad? 8565?

Thanks,
Clarence

2004-04-17 08:50

Cybernator

Registered: Jun 2002
Posts: 154

Hi Clarence,

If you are sure it's the userport, you should replace CIA2 - 6526(a). Assuming that you have a new board C64, it's the chip on the left. On the older boards, CIA2 is on the right.
As for testing the userport, nothing comes to mind right now.

2004-04-17 10:44

Clarence

Registered: Mar 2004
Posts: 121

Quote: Hi Clarence,

If you are sure it's the userport, you should replace CIA2 - 6526(a). Assuming that you have a new board C64, it's the chip on the left. On the older boards, CIA2 is on the right.
As for testing the userport, nothing comes to mind right now.

Cybernator!

Yes it's a newer cased c64, I found the chip. Thanks for the info, I wasn't sure which IC is it. The cable is very easy and I triple checked it, shouldn't be wrong, maybe the description is false ...

L8r,
Clarence

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