+- DC-SWAT Forum (http://www.dc-swat.ru/forum)
+-- Форум: Sega Dreamcast (/forum-2.html)
+--- Форум: Hardware (/forum-9.html)
+--- Тема: Sega Dreamcast & NAOMI SCI-SPI Mod (/thread-4172.html)
Sega Dreamcast & NAOMI SCI-SPI Mod - SWAT - Вчера 10:13
This guide explains how to access the SH-4 SCI port on Sega Dreamcast and NAOMI systems for both UART/SPI communication modes.
This is can be used for alternative SD card modding or debugging.
In SPI-like mode, SCI can reach transfer speeds of up to 1.5 MB/s, which is x2 faster than mod using the SCIF port for bit-bang SPI.
http://www.dc-swat.ru/blog/hardware/1143.html
RE: Sega Dreamcast & NAOMI SCI-SPI Mod - aldair - Вчера 23:15
(Вчера 10:13)SWAT писал(а): This guide explains how to access the SH-4 SCI port on Sega Dreamcast and NAOMI systems for both UART/SPI communication modes.
This is can be used for alternative SD card modding or debugging.
In SPI-like mode, SCI can reach transfer speeds of up to 1.5 MB/s, which is x2 faster than mod using the SCIF port for bit-bang SPI.
http://www.dc-swat.ru/blog/hardware/1143.html
Will games that require DMA work on the SCI-SPI Mod?
Will it only support all Serial Port games at double the speed?
Awesome news!
RE: Sega Dreamcast & NAOMI SCI-SPI Mod - megavolt85 - Вчера 23:31
(Вчера 23:15)aldair писал(а): Will games that require DMA work on the SCI-SPI Mod?
no, WINCE and all with MMU don't supported
(Вчера 23:15)aldair писал(а): Will it only support all Serial Port games at double the speed?
yep, GDI without downsample video/audio/CDDA
RE: Sega Dreamcast & NAOMI SCI-SPI Mod - aldair - Вчера 23:38
(Вчера 23:31)megavolt85 писал(а):(Вчера 23:15)aldair писал(а): Will games that require DMA work on the SCI-SPI Mod?
no, WINCE and all with MMU don't supported
(Вчера 23:15)aldair писал(а): Will it only support all Serial Port games at double the speed?
yep, GDI without downsample video/audio/CDDA
Very good!