Hi, I've been trying to get AmForth onto this Atmega 8 based platform:
https://www.elektronik-labor.de/Lernpakete/Pingong.html https://www.elektronik-labor.de/Elo/ELO.html Which is sold cheaply as a toy: https://de.elv.com/franzis-ping-pong-das-retro-spiel-zum-selberbauen-bausatz-144843 Already soldered the ISP connector and a serial TTL cable. However, AmForth (v6.9) does not seem to compile for Atmega8 in its current version. Copying the template directory and editing makefile to say "MCU=atmega8", I'm getting a lot of compiler errors that indicate an overflow of the RWW dictionary space: ../../avr8\amforth-interpreter.asm(4): error: Overlap in .cseg: addr=0xc00 conflicts with 0x7a:0xc58 ../../avr8\amforth-interpreter.asm(5): error: Overlap in .cseg: addr=0xc01 conflicts with 0x7a:0xc58 [..] If I randomly comment out words in avr/appl_2k.inc, I get a little further. However, then compilation errs out in the UART driver code and complains about stuff in macros.asm: ../../avr8\drivers/usart_0.asm(1): error: Undefined symbol: UBRR0L ../../avr8\drivers/usart_0.asm(2): error: Undefined symbol: UBRR0H ../../avr8\drivers/usart_0.asm(3): error: Undefined symbol: UCSR0C ../../avr8\drivers/usart_0.asm(4): error: Undefined symbol: UCSR0B ../../avr8\drivers/usart_0.asm(5): error: Undefined symbol: UCSR0A ../../avr8\drivers/usart_0.asm(12): error: Undefined symbol: RXC0 ../../avr8\drivers/usart_0.asm(13): error: Undefined symbol: UDRE0 ../../avr8\drivers/usart_0.asm(14): error: Undefined symbol: TXEN0 ../../avr8\drivers/usart_0.asm(15): error: Undefined symbol: RXEN0 ../../avr8\drivers/usart_0.asm(16): error: Undefined symbol: RXCIE0 ../../avr8\drivers/usart_0.asm(17): error: Undefined symbol: UDRIE0 ../../avr8\macros.asm(94): error: jmp k: Unsupported instruction on ATmega8 ../../avr8\macros.asm(94): error: jmp k: Unsupported instruction on ATmega8 ../../avr8\macros.asm(94): error: jmp k: Unsupported instruction on ATmega8 ../../avr8\macros.asm(94): error: jmp k: Unsupported instruction on ATmega8 And this is even before I try to resolve all the problems arising from the words that I commented out. Maybe the Atmega8-specific code has been bit-rotting without being used for too long already? What do you think are my chances to make this work again? Any ideas what's wrong about the Uart drivers and how to strip down AmForth to fit into 8 kB of flash? Or has AmForth just gotten too old and fat over the years to render this undertaking unachievable? (I did some experiments with an Arduino Uno clone first, and had no problem compiling and setting up AmForth on it.) Maybe the Arduboy [1] would be better suited to AmForth, but it's also more costly and complex to program. I'm also eyeing the uzebox [2], but getting its video driver into AmForth would be a daunting endevour. cheers, David [1] https://www.reichelt.de/arduboy-arduino-kompatibles-miniaturspielsystem-ard-arduboy-p254388.html?&trstct=pos_0&nbc=1 [2] http://belogic.com/uzebox/index.asp -- GnuPG public key: http://dvdkhlng.users.sourceforge.net/dk2.gpg Fingerprint: B63B 6AF2 4EEB F033 46F7 7F1D 935E 6F08 E457 205F _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
