Talk:PowerPak Menu: Difference between revisions
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Does it reload this mapper automatically after /RESET? by invocation? [[User:Myask|Myask]] ([[User talk:Myask|talk]]) 10:46, 10 July 2017 (MDT) | Does it reload this mapper automatically after /RESET? by invocation? [[User:Myask|Myask]] ([[User talk:Myask|talk]]) 10:46, 10 July 2017 (MDT) | ||
: Based on there being [http://www.vintagecomputing.com/wp-content/images/powerpak/powerpak_inside2_large.jpg four chips on the board] alongside the memory and FPGA, and MAPPERWR being at $8000 (probably actually $8000-$FFFF), I think the UNROM part is discrete logic (and gets enabled by a long reset) and the rest is manually reloaded as almost the first thing the boot ROM does. I don't know if the UNROM chips stay in use during the menu or if the FPGA takes over. [[User:NovaSquirrel|NovaSquirrel]] ([[User talk:NovaSquirrel|talk]]) 01:39, 11 July 2017 (MDT) | |||
Latest revision as of 07:39, 11 July 2017
Other useful questions
Does it reload this mapper automatically after /RESET? by invocation? Myask (talk) 10:46, 10 July 2017 (MDT)
- Based on there being four chips on the board alongside the memory and FPGA, and MAPPERWR being at $8000 (probably actually $8000-$FFFF), I think the UNROM part is discrete logic (and gets enabled by a long reset) and the rest is manually reloaded as almost the first thing the boot ROM does. I don't know if the UNROM chips stay in use during the menu or if the FPGA takes over. NovaSquirrel (talk) 01:39, 11 July 2017 (MDT)
