Hi D Williams - I managed to get Amforth running on a Mega128. There are three undocumented file changes you need to make:
“core/devices/atmega128/device.asm”: add these lines (I put them after 'ifndef EEPME' etc…) .ifndef MCUSR .equ MCUSR = MCUCSR .endif For some reason the Mega128 doesn't have the MCUSR register, but the MCUCSR does the same job (and a bit more...). Adding these lines ensures the code will compile with the Mega128 as well as the others supported. “core/words/istore_nrww.asm” (or "core/words/store-i_nrww.asm") edit line 114 from in temp1, SPMCSR to in_ temp1, SPMCSR , and line 122 from out SPMCSR,temp0 to out_ SPMCSR,temp0 The 'in' and 'out' commands only work for a limited range of addresses. Fortunately the macros 'in_' and 'out_' do the same job for all addresses. Finally, “core/drivers/usart_0.asm”: change lines 1 to 6 to: .equ BAUDRATE_LOW = UBRR0L + $20 .equ BAUDRATE_HIGH = UBRR0H .equ USART_C = UCSR0C .equ USART_B = UCSR0B + $20 .equ USART_A = UCSR0A + $20 .equ USART_DATA = UDR0 + $20 These changes are caused by the Mega128 trying to cram a quart into a pint bottle. Some addresses are double booked, and this offset is needed to fix things. With these modifications to the code I was able to get the system up and running in the AVR Studio (version 4) simulator - and even talk to it using 'Hapsim', which permits you to make a virtual serial connection to the emulated code. Hope that's helpful - David Jeffrey On 9/15/2011 12:03 PM, Erich Waelde wrote: > Hello, > > > On 09/15/2011 05:22 PM, D Williams wrote: >> FWIW - The last version that worked for me on the amtega128 was amforth 3.1 >> After that, I could not sort out the interrupts. > There was a Problem with interrupt addresses being off by a factor of 2. But > I don't recall, which version it was. And maybe it was a trunk version only, > not a release. I'm using amforth 4.5 routinely on atmega32. > >>> Hello guys, >>> I'm trying to build amforth for an ATmega128. >>> It won't compile, searching for a definition of MCUSR. >>> Attached you'll find the folder content I'm using (a standard template). >>> amforth ver. 4.5 >>> AVR Studio 4 (latest build) > Have you spotted Karl Lunts userguide on the webpage? > http://amforth.sourceforge.net/amforth-userguide.pdf > > I'm not using AvrStudio, so I cannot comment on that other than > asking: what is the exact error message you are getting? > > > Cheers, > Erich > > ------------------------------------------------------------------------------ > Doing More with Less: The Next Generation Virtual Desktop > What are the key obstacles that have prevented many mid-market businesses > from deploying virtual desktops? How do next-generation virtual desktops > provide companies an easier-to-deploy, easier-to-manage and more affordable > virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/ > _______________________________________________ > Amforth-devel mailing list for http://amforth.sf.net/ > Amforth-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/amforth-devel > ------------------------------------------------------------------------------ Doing More with Less: The Next Generation Virtual Desktop What are the key obstacles that have prevented many mid-market businesses from deploying virtual desktops? How do next-generation virtual desktops provide companies an easier-to-deploy, easier-to-manage and more affordable virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/ _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
