Search results

The Prop doesn't use interrupts, BUT by monitoring the clear pin on the shift register I could fake it. I need to start prototyping. Something tells me this will be easier than I think, but I'm going to have to be a little more clever than I'm being.

I can. The issue is the strange frequency. Most microcontrollers and processors are made today to use a evenly divisible clock frequency. I want to use the Propeller because it have built in video generation, but it works best with a 80 MHz clock (delivered via an external 5 MHz source clock and...

The video rate would be the reason to do this. Getting it from 15.6677 to 16 MHz would make it much easier to read. Nothing now runs off such an odd frequency and reading any data clocked off of that frequency presents some rather difficult challenges. But hey, Apple saved a buck or two on a...

The logic board has circuitry that divides the clock signal in half. I would need to supply a 16MHz clock to the logic board in order to run the processor at 8 MHz.

I hate to bring this back up, but I have a couple of questions I hope can be answered. Since the frequency is related to baud rates and the serial ports are really all but useless now (at least for me anyway), what other effects would I see by bumping up the frequency? My biggest concern is...

It's really strange. My dad bought me that computer in '92 or '93. I haven't used it since around 2000. I bought an iMac in '98 and the iMac's IDE drive is toast.

It works! It arrived today. I was able to get all of the information off of the drive, including a game that my dad was working on that I lost many years ago. :approve: I'm in more of a state of shock right now than happy. I never thought I'd see this stuff again!

Propeller God? :lol: No. I've done one project with the Prop, a temperature controller for a reptile enclosure. It used a 4x20 character LCD and I had to write the driver for that. What surprised me was how easy everything was. It helps that Parallax has excellent documentation and a busy...

I've used Macsbug, but not for more than a decade. I don't remember that. I vaguely remember some sort of easter egg associated with it, but I'm not sure what that was.

I'm probably going to have to grab the whole frame. The scan doubling sounds interesting, but it will be displayed on an LCD monitor. What I think I'm going to do is make the bitmap 1024x768, double the video input and center it vertically in the bitmap. This shouldn't be too hard and I'll need...

Sorry, I was writing my post while you made your post. Taking the signal off the board is an option, but then the two boards are physically locked together. I really don't want to do this if I can avoid it. The video processing on the Prop will be in software. I'll read read the H Sync, V Sync...

Oscillators with a 7.8336 frequency and its multiples are extremely hard to find. I found a 31.3344 MHz oscillator and will run the Prop off of that. I'l use the Prop's built-in PLL to double this frequency to 62.6688. The software written for the Prop is typically designed to work at or near 80...

Everything derives from the same clock. The frequency from the oscillator is divided in half for the processor and further for other IC's. The full clock speed is fed to the video generator. I would imagine that everything would scale to the newer clock. What was the reason behind the odd clock...

I am working on a project with my Plus. The analog board is dead and while I do plan to fix it, I want to play around with a microcontroller. Anyway, One thing I'll need the microcontroller to do is read the video signal and convert the data to a VGA signal. I'm going to be using the Parallax...

Thank you. That worked.

I found that earlier, but wans't sure which to download. I'm dual booting XP 32-bit and Windows 7 64-bit. I'm thinking the Vista drivers might work with 7. Windows' generic drivers might work as well. Of course, the card may come with the drivers. I'll soon see...

This is it here: http://cgi.ebay.com/IBM-10L7095-Adaptec-AHA-2940U-W-B-SCSI-Controller_W0QQitemZ390112599170QQcategoryZ56092QQcmdZViewItemQQ_trksidZp4340.m263QQ_trkparmsZalgo%3DSIC%26its%3DI%252BC%26itu%3DUCI%252BIA%252BUA%252BFICS%252BUFI%26otn%3D10%26ps%3D63#ht_3106wt_1165

Awesome! Thanks for the tip! I was about to drop a load of cash on Mac Disk. I'm hoping the driver comes with the card. I'm pretty sure I can find it online though. I powered up the drive and it ran very quietly. I'm hoping it is still good.

Thanks for the offer, but I just bought a cheap one off of eBay. Oh well, it only cost me $15 with shipping and it is from a reputable company. If it doesn't work, I'm only out $15. Now I just need software to read Mac drives in Windows...

Never mind... Google is my friend. :o) It's a SCSI, so now what? I would hate to buy a SCSI card for a drive that has been dormant for nearly ten years. :-/