Re: [新聞] Kale＇s WIP - Kinda I Want to (2011/ …
2011.02.17
Thanks te_lanus for submitting news
Today I’ve gave a look at the Sony SMC-777 HW again. The system uses a “
timed” bankswitch, presumably involving instruction pre-fetching.
For example (this is BIOS ROM code, located at 0×0000-0x3fff):
3BF3: 3E 10 ld a,$10
3BF5: D3 1C out ($1C),a ;enables RAM bankswitch
3BF7: C7 rst $00 ;executes this, then switches to RAM mode
Enabling this and adding the unimplemented features makes all of the
available programs / games to boot properly with sketchy keyboard and
some games with imperfect colors (presumably missing clut):
http://mamedev.emulab.it/kale/wp-content/uploads/2011/02/0133.png
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來源：http://mamedev.emulab.it/kale/?p=1365
※ 引述《conpo (びんぼうがみ)》之銘言：
: 2011.02.13
: Take the Red pill
: Fixed address readback in rf5c68 and added a preliminary audio redbook
: support in Mega CD / Sega CD driver … results are shown in this YT video:
: http://www.youtube.com/watch?v=xqZKrv9Yo7E&feature=player_embedded
: ______________________________________________________________________________
: 來源：http://mamedev.emulab.it/kale/?p=1360
: ※ 引述《choan (八房龍之助)》之銘言：
: : http://mamedev.emulab.it/kale/
: : Fixed a timing GD-ROM DMA bug to not fire the irq and zero the status flag
: : instantly. This allows us to boot The King of Fighters Neowave.
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※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 59.115.177.101
※ 編輯: conpo 來自: 59.115.177.101 (02/17 13:49)
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