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Started by Dmanu78, 19:50, 23 April 22
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Quote from: krusty_benediction on 07:09, 25 April 22it seems that you do not handle snapshots.
Quote from: Dmanu78 on 21:18, 24 October 22HiThanks for your feedback. The accuracy of the AmspiriT emulation is no accident of course. The initial choice to emulate the z80 in T-states has its importance in some shaker tests. The decision to emulate the GA at 16 Mhz also had a significant impact on the visual tests on the appearance and duration of the Hsync signal, on the 1-pixel shift in mode 2 etc... This also explains why Amspirit is so resource-intensive. Emulation accuracy requires a lot of power.
Quote from: Axelay on 08:43, 24 October 22You mentioned in the manual wanting to hear other peoples 'cpu reserve' figures, I am getting around 25 on my Core i5 4460.
Quote from: Dmanu78 on 22:24, 25 October 22@roudoudou. Yes, each byte of the video memory is read every 1/2.000.000s by Gate Array. And even more, each bit of the video memory is managed every 1/16.000.000s (= 1 pixel Mode 2), like the real GA (I guess)
Quote from: roudoudou on 09:39, 26 October 22DManu, if you wanna support "less than pixel vertical scroll", maybe not up to 1/64 pixel but for interlaced mode...there is an old proof of concept of interlaced mode made by Grim in 2011 (and another screen in R-Type 2012)https://www.cpc-power.com/index.php?page=detail&num=9564
Quote from: Dmanu78 on 23:56, 26 October 22@roudoudou I am surprised. I thought that the GA read the 2 bytes consecutively on 2 Mhz I found this schematic reproducing the signals of a CPC 464, you can see that during the tWait* signal the Gate Array reads the video memory over a period of 2 Tstates, but maybe I am misinterpreting. In practice this remains the internal working of the GA and I think it has no impact on the video rendering displayed by the emulator but it's interesting anyway. @McArti0 yes indeed, I rewrote the CTM (Monitor) emulation this summer and forgot to support the 60 Hz mode. This will be fixed in a future version of course. Thanks for this feedback. Generally speaking, if Amspirit emulates rather well the z80, the Gate Array and the 3 CRTC, the emulation of the other components remains partial and especially the FDC (Floppy Disk) and the CTM. There is still a lot of work to do...
Quote from: Dmanu78 on 21:18, 24 October 22I did a minimalistic development on the keyboard and joystick mapping, it's not my first priority yet, but I'll make some improvement later on of course.
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