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added a note about C2 IRQ6 for future reference when rewriting all this.

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davidhay 2008-10-12 09:18:59 +00:00
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src/mame/drivers/megadriv.c
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@ -41,6 +41,19 @@
Known Non-Issues (confirmed on Real Genesis)
Castlevania - Bloodlines (U) [!] - Pause text is missing on upside down level
Blood Shot (E) (M4) [!] - corrupt texture in level 1 is correct...
Cleanup / Rewrite notes:
On SegaC2 the VDP never turns on the IRQ6 enable register
This is because on the real PCB that line of the VDP isn't
connected. Instead the IRQ6 interrupt is triggered by the
line that is used to generate the Z80 interrupt on a standard
genesis. (Once, every frame, on screenline 224)
I should provide interrupt callback functions for each
vdp line state change, which can be configured in the init
rather than hardcoding them.
*/