Fixforissue407 #408
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Fixforissue407 #408
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Rhialto had the feature request to have a mode, where Xemu/MEGA65 can warn you on reading memory which was not written before, can be useful to find ROM bugs. In this current form, it's quite minimal and simple: 1. Only works on the first 126K of physical RAM 2. Only works from command line, start emulation with paramter: -ramcheckread 3. You need to watch the output of the emulator, so on UNIX-like/Linux/Mac systems, emulator should be started from terminal window, on Windows, Xemu console must be open (start also with parameter: -syscon) 4. Check the output of the emulator, you can find lines like: MEM: DEBUG: main RAM at linear address $101A0 has been read without prior write; PC=$8613 [$20613] The PC value can be off by some bytes, because it may have been incremented already during opcode emulation. The [...] is the linear address for the mentioned CPU PC value. Well, that's it.
Incomplete and possible buggy first try implementation of DMA line drawing. Ideas are based on a "draft implementation" by btoschi on Discord (@bjotos on github). The only reason I present this highly incomplete work in the next branch of Xemu (so not in dev) because I am on holiday, so it's a bit random when I have time to do more work. Thus it's better to release it in this unfinished form, I guess, if someone wants to play with it.
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Dang it, I mean't to submit this pull request for .next not .master, sigh |
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Fix for issue #407
When GOTOX bit is set, enable_bg_paint should be set/cleared based on colorram0-bit7