64kib

06/21/2018

09:44 PM EclaireXL Bug #67: Pokey two tone timing problem

I found if I pokey 53775,11+128 on the Atari then it matches the Eclaire output. Unfortunately forcing the serious ou... foft

06/20/2018

10:03 PM EclaireXL Bug #67: Pokey two tone timing problem

So, errr identical then! Going to have to think about this one...
B is Atari, A is EclaireXL.
!http://www.64kib... foft

09:57 PM EclaireXL Bug #67: Pokey two tone timing problem

Nope, seems to be some interaction with the noise filtering. I wonder if the delay also needs applying to the pulse f... foft

09:27 PM EclaireXL Bug #67: Pokey two tone timing problem

A 2 cycle delay on the reset fixes both the 4 cycle and the 9 cycle case.
Now to check this specific example! foft

06/19/2018

09:55 PM EclaireXL Bug #67: Pokey two tone timing problem

I was concerned that my clocks were off at first since I was running in VGA mode, but that changes vsync slightly (50... foft

09:54 PM EclaireXL Bug #67: Pokey two tone timing problem

Been measuring cases on the scope...
Confirmed the extra cycle delays described in that forum post on my 600XL. Co... foft

06/14/2018

08:35 PM EclaireXL Bug #67: Pokey two tone timing problem

Related post: http://atariage.com/forums/topic/118448-implementation-of-pokey-2-tone-filter-in-emulation/page-3#entry... foft

06/11/2018

09:09 PM EclaireXL Feature #65: Implement ATA to SPI bridge

What is used in set features?
0xef set features, then set feature 1 + lba mode?
Think this can probably be igno... foft

09:04 PM EclaireXL Feature #65: Implement ATA to SPI bridge

Identify:0xec
0->SCNT,SNUM,CYLL,CYLH
0xa0->HEAD
0xec >STAT
read stat -> if 0 then does not exist! Then wait for B... foft

08:53 PM EclaireXL Feature #65: Implement ATA to SPI bridge

https://wiki.osdev.org/ATA_PIO_Mode
Probably want at least DRQ(3/ 1=ready), RDY(6 /1=good) and BSY(7/ 0=not busy) ... foft

08:40 PM EclaireXL Feature #65: Implement ATA to SPI bridge

Some links..
https://www.pjrc.com/tech/8051/ide/wesley.html#idereg
http://atariage.com/forums/topic/279232-fujiconv... foft

08:24 PM EclaireXL Feature #71 (New): Add support for user firmware updates

Add support to load new firmware from sd card. Then it can be applied immediately for testing or flashed.
I'd like... foft