Check out this interesting website
An atmega1280 with extra SRAM
http://avrhelp.mcselec.com/index.html?adding_xram.htm
Could this be of any use ?
Search found 7 matches
- Sun Jul 06, 2014 11:23 pm
- Forum: Programming & Software
- Topic: 6502 emulator + BASIC interpreter: possible?
- Replies: 4
- Views: 3829
- Sun Jun 22, 2014 10:30 am
- Forum: Programming & Software
- Topic: Uzebox SD Gameloader V0.4.5
- Replies: 179
- Views: 202683
- Wed May 28, 2014 12:24 am
- Forum: Programming & Software
- Topic: Uzebox SD Gameloader V0.4.5
- Replies: 179
- Views: 202683
Re: Uzebox SD Gameloader V0.4.4! via Avrdude
Finally after several attempts, I have managed to program the bootloader on the atmega644 with Avrdude 5.10 Heres the commands I used from within Windows xp via dos using a UsbtinyIsp v3.0 programmer avrdude -c usbtiny -p m644p -e -U flash:w:bootl.hex avrdude -c usbtiny -p m644p -U lfuse:w:0xd7:m -U...
- Thu May 08, 2014 7:09 pm
- Forum: Hardware
- Topic: Atmega1284P Test Results -- UPDATED!
- Replies: 32
- Views: 35397
Re: Atmega1284P Test Results -- UPDATED!
Thanks Uze for the feedback, I will use a 644. Thanks again and I shall use your guide with regards to programming the 644 with avr studio!
- Thu May 08, 2014 4:34 pm
- Forum: Hardware
- Topic: Atmega1284P Test Results -- UPDATED!
- Replies: 32
- Views: 35397
Re: Atmega1284P Test Results -- UPDATED!
Hello everyone, I recently built the euzebox using a 1284p as a had a spare from another project running a zx81/spectrum from this AVR, I flashed the 1284p and wondered why it wasn't working, not even displaying anything. One thing I am aware of the 1284p is not happily overclocked at 28mips , but r...
- Fri Jun 14, 2013 9:05 pm
- Forum: Off Topic
- Topic: Sinclair ZX81 clone with ATMEGA644
- Replies: 11
- Views: 13179
- Fri Jun 14, 2013 8:51 pm
- Forum: Off Topic
- Topic: Sinclair ZX81 clone with ATMEGA644
- Replies: 11
- Views: 13179
Re: Sinclair ZX81 clone with ATMEGA644
Hello everyone The uzebox red pcb is very suitable for the ZX81 avr project,I retrogadets have comments on this on this website http://www.forum64.de/wbb3/board65-neue-hardware/board289-diverses/board191-aktuelle-mikrokontroller/45536-zx81-auf-avr-basis-ax81/index8.html#post640758 if anyone is inter...