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but the best and cheapest way for building a retro video terminal (40x24)is in using just a ATMEGA32, a MAX232 and a TINY2313 (for the PS2 keyboard). The most work is already done and the sources are freely available at our websites (the A-ONE project from San and Franz). NTSC and PAL Video is suppo...
by franz
Nov Thu 22, 2007 2:16 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: TV and/or VGA terminal
Replies: 25
Views: 52062

Hi Guys, here is the next step making a terminal. Buy a joytech PS2 bad quality Video Unit, open it, disassemble the Sharp 7" LCD and convert it with 4 resistors and a diode to a vga display. Rewrite the parallax VGA driver that a 480x234 LCD can be used. The display quality is not bad !!! have...
by franz
Nov Thu 22, 2007 4:44 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: TV and/or VGA terminal
Replies: 25
Views: 52062

Vince, making a video or VGA terminal is a great idea. I allready did some design work by using a propeller. It seems to be one of the most complete boards available right now. But i think it will not reduce the chip/components count because you need a propeller, a eeprom and a LDO 3,3V and you need...
by franz
Nov Tue 20, 2007 5:33 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: TV and/or VGA terminal
Replies: 25
Views: 52062

Hi Vince, i asked Steve Wozniak last month about this problem. Here his answer: ---------------------- I would suggest a low-pass filter, cutoff around 5 kHz., on the signal from the tape recorder. Such a filter would be beneficial for the data to the tape as well. I may have myself included a filte...
by franz
Mar Mon 19, 2007 5:16 am
 
Forum: Creation Room
Topic: Cassette Interface now works!!
Replies: 64
Views: 123667

Hello John, i did some investigation too at my Mac Classic II Keyboard. I can see an 8048 Intel Microcontroller managing the ADB. But there will be no way handling the Apple Desktop Bus together with the Replica :-(((( The only thing what we can do is replacing the 8048 with a 8748 EPROM-Type and wr...
by franz
Mar Fri 02, 2007 12:04 pm
 
Forum: Troubleshooting
Topic: Anyone Suggest a Cheap Logic Analyzer?
Replies: 2
Views: 6970

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