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removed excessive documentation about dreamcast cable settings

This commit is contained in:
Anthony Pesch 2016-12-05 23:31:37 -08:00
parent dc43694476
commit 5c0fcf9417
1 changed files with 4 additions and 31 deletions
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35
src/hw/sh4/sh4.c
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@ -381,37 +381,10 @@ REG_R32(sh4_cb, PDTRA) {
((pctra & 0xf) == 0xc && (pdtra & 0xf) == 0x2)) {
v = 3;
}
/*
* FIXME cable setting
* When a VGA cable* is connected
* 1. The SH4 obtains the cable information from the PIO port. (PB[9:8] =
* "00")
* 2. Set the HOLLY synchronization register for VGA. (The SYNC output is
* H-Sync and V-Sync.)
* 3. When VREG1 = 0 and VREG0 = 0 are written in the AICA register,
* VIDEO1 = 0 and VIDEO0 = 1 are output. VIDEO0 is connected to the
* DVE-DACH pin, and handles switching between RGB and NTSC/PAL.
*
* When an RGB(NTSC/PAL) cable* is connected
* 1. The SH4 obtains the cable information from the PIO port. (PB[9:8] =
* "10")
* 2. Set the HOLLY synchronization register for NTSC/PAL. (The SYNC
* output is H-Sync and V-Sync.)
* 3. When VREG1 = 0 and VREG0 = 0 are written in the AICA register,
* VIDEO1 = 1 and VIDEO0 = 0 are output. VIDEO0 is connected to the
* DVE-DACH pin, and handles switching between RGB and NTSC/PAL.
*
* When a stereo A/V cable, an S-jack cable* or an RF converter* is
* connected
* 1. The SH4 obtains the cable information from the PIO port. (PB[9:8] =
* "11")
* 2. Set the HOLLY synchronization register for NTSC/PAL. (The SYNC
* output is H-Sync and V-Sync.)
* 3. When VREG1 = 1 and VREG0 = 1 are written in the AICA register,
* VIDEO1 = 0 and VIDEO0 = 0 are output. VIDEO0 is connected to the
* DVE-DACH pin, and handles switching between RGB and NTSC/PAL.
*/
v |= 0x3 << 8;
/* FIXME cable setting */
int cable_type = 3;
v |= (cable_type << 8);
return v;
}