??? 10/19/05 17:45 Read: times |
#102645 - Computer Responding to: ???'s previous message |
Jeff Corr said:
Which derivative are you using? I would assume something faster than your standard 11Mhz? To give us flexibility, we are working with the Dallas 89C420 at 11Mhz which, after driving video, still leaves us with enough free instruction cycles to execute code approximately 16 times faster than a traditional 12-clocker. Using it for video as well as general processing... amazing. I woulda taken another route, probably a few of them networked. We considered that--especially for the video. But currently it looks like all the major features of a simple computer can be handled by a single '420. So as long as it can do it, we plan on doing it with a single-MCU approach. Regardless, I loved playing with the SBC's monitor, if your gonna produce PCBs for this, I want one :) I suspect we probably will eventually. I was originally thinking of making it an adapter board for the SBC but I don't think that'll be useful since the '52 computer will have some very specific input/output (PS/2 keyboard/mouse and video output and an SD card slot, or maybe CompactFlash, who knows) which makes things like the 4x4 keypad and 16x2 LCD circuitry entirely useless to the computer. So it'll probably end up being a brand new PCB. We're still a long ways off on that, though. First we need to get all the parts working to our satisfaction, then we open it up as a public project where everyone that is interested can argue about the best way to connect the parts, the memory map, etc. THEN we'll be ready to put together a PCB. :) Regards, Craig Steiner |
Topic | Author | Date |
8051 8-bit computer | 01/01/70 00:00 | |
(or z80) | 01/01/70 00:00 | |
8051 computer | 01/01/70 00:00 | |
I never cringe on a "fun exercise" I do, | 01/01/70 00:00 | |
awesome? | 01/01/70 00:00 | |
Computer | 01/01/70 00:00 | |
8051 Computer. | 01/01/70 00:00 | |
Minor corrections | 01/01/70 00:00 | |
11MHz? | 01/01/70 00:00 | |
Not sure | 01/01/70 00:00 | |
Congratulations | 01/01/70 00:00 | |
Actually it's teh same | 01/01/70 00:00 | |
11MHz | 01/01/70 00:00 | |
Re: 8051 computer | 01/01/70 00:00 | |
Just us | 01/01/70 00:00 | |
Project Team | 01/01/70 00:00 | |
me tried | 01/01/70 00:00 | |
thoughts on project | 01/01/70 00:00 | |
What is a true multitasking controller? | 01/01/70 00:00 | |
multitasking controller | 01/01/70 00:00 | |
video | 01/01/70 00:00 | |
continued.. | 01/01/70 00:00 | |
continued.. | 01/01/70 00:00 | |
I don't think so | 01/01/70 00:00 | |
color display? | 01/01/70 00:00 | |
Predko Video | 01/01/70 00:00 | |
yes | 01/01/70 00:00 | |
video, timing, speeds etc. | 01/01/70 00:00 | |
Video Timing. | 01/01/70 00:00 | |
6.2MHz pixel clock? | 01/01/70 00:00 | |
Pixel Clock | 01/01/70 00:00 | |
pix clock | 01/01/70 00:00 | |
overclocking | 01/01/70 00:00 | |
pad pixels | 01/01/70 00:00 | |
just a suggestion | 01/01/70 00:00 | |
Speed | 01/01/70 00:00 | |
DS'4x0 | 01/01/70 00:00 | |
DIP / surface mount | 01/01/70 00:00 | |
a 100MHz chip in a perf board? methinks | 01/01/70 00:00 | |
Hardware multitasking | 01/01/70 00:00 | |
Multitasking redefined | 01/01/70 00:00 | |
Misplaced self belief... | 01/01/70 00:00 | |
Daunting? | 01/01/70 00:00 | |
breadboarded | 01/01/70 00:00 | |
TRS-80 | 01/01/70 00:00 | |
TRS80? | 01/01/70 00:00 | |
in the beginning there was .. | 01/01/70 00:00 | |
TRS-80 Info | 01/01/70 00:00 | |
Man those were the days. | 01/01/70 00:00 | |
That fast? | 01/01/70 00:00 | |
More retroinfo | 01/01/70 00:00 | |
TRS-80 forward speed. | 01/01/70 00:00 | |
Like I said, It was a long time ago | 01/01/70 00:00 | |
hrm | 01/01/70 00:00 | |
TRS80 model 1 speed... | 01/01/70 00:00 | |
TRS80 | 01/01/70 00:00 | |
You think? | 01/01/70 00:00 | |
OK so both | 01/01/70 00:00 | |
No pictures yet | 01/01/70 00:00 | |
Video Capture Card? | 01/01/70 00:00 | |
Nope | 01/01/70 00:00 | |
video output | 01/01/70 00:00 | |
Qui? | 01/01/70 00:00 | |
Multitasking | 01/01/70 00:00 | |
Real Time and Multi Tasking | 01/01/70 00:00 | |
Maybe whomever has "no idea what I'm tal | 01/01/70 00:00 | |
It's probably at least fast enough ... | 01/01/70 00:00 |