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Sega System E
Posted: Thu May 27, 2010 12:49 am
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I have written some documentation for the SMS-derived Sega System E arcade board:
http://cgfm2.emuviews.com/txt/setech.txt For SMS developers what makes this system fun is: 5.36 MHz Z80, memory mapped VRAM (write-only), two VDPs with 32K of VRAM each (banked). There seem to be no good games for this system other than Fantasy Zone 2. :) |
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Posted: Sun Sep 17, 2017 10:21 pm |
really great document !
starting to read it, i'm trying to add support of system e on sega saturn using, charlesm super fast sms video emulation for saturn ! |
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Posted: Sat Sep 23, 2017 8:17 pm |
i'm stucked on displaying sprites, think sprites of vdp1 are displayed but not sprites of vdp2, could someone help ?
during set register i do that : case 0x05: /* Sprite Attribute Table Base Address */ if(segae_vdp_vrambank[chip]) satb[chip] = ((segae_vdp_regs[chip][regnumber] << 7) + (segae_vdp_vrambank[chip] * 0x4000)) & 0x7F00; else satb[chip] = (segae_vdp_regs[chip][regnumber] << 7) & 0x3F00; bikes are not displayed, i get only trees, some road signs and puddles on road. |
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Posted: Sun Dec 31, 2017 9:44 pm |
just a technical question, somebody here would know why opa opa displays black screen on old mame video driver for system e whereas every other games work normally (it's not because of mc8123 protection) ? in other words what uses opa opa that so special from the vdp chip ? | |
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Posted: Sun Dec 31, 2017 11:03 pm |
my humble experiences for Sega E are still not that relevantly different from what i have made for Master System - http://www.boriel.com/wiki/en/index.php/ZX_BASIC:Released_Programs_-_SegaE - i actually never saw the real hardware in my front... - i don‘t know how that can be helpful | |
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Posted: Mon Jan 01, 2018 2:47 pm |
I believe it is something to do with hints, did you notice that opaopa's titlescreen displays a line-scroll technique on the logo, on a working mame? The technique is very similar to how hangonjr curves the road. The problem I have with your code and old mame is that it sets the hint counter to 0xc8, but in reality it needs a hint on every line. Things to check, are you 100% sure the video mode for this game is 192 lines visible? (I'm not, we need to check registers) also need to research mame's src/devices/video/315_5124.* to see how they are handling things. bye for now, - dink |
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Posted: Thu Jun 14, 2018 3:08 pm |
The original URL seems to be dead, but it's still hosted on Archive, for those that were looking around for it.
Mostly checked it out of curiosity myself! |
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