Hi David Just found your response and time, so I tried it on amforth 4.8
Works great! I had to use AVR Simulator 2 to get ATmega128 (instead of 128A and 128P on AVR simulator1) Some of the instructions in the 4.2 User guide are out of sync with 4.8; but since the software was known to be good I was able to sort it out. Programed it with Kanda AVRISP over parallel port on an old STK300, if anyone is curious. Questions: The file “core/devices/atmega128/device.asm” says- "generated do not edit" Can these changes be added to the regular code base? “core/drivers/usart_0.asm” - Can the changes to be added to the code base without messing things up for other processors? Or is the ATmega128(x) too obscure to merit attention? Comment: "core/words/store-i_nrww.asm" the underscores are already present; Very helpful, completely solved a long standing problem. Thanks! >>>>>>>>>>> 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 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
