Calamity, here it is. Sorry, it's been a little while since I posted here. I do see the first thing it says is horizontal, is that because of mame.ini? I tried changing that once before running this log and it didn't seem to have an effect, but let me know what you see!
SwitchRes: v0.017e, Monitor: generic_15, Orientation: horizontal, Modeline generation: enabled
SwitchRes: Monitor range 15625.00-15750.00,49.50-65.00,2.000,4.700,8.000,0.064,0.192,1.024,0,0,192,288,448,576
SwitchRes: \\.\DISPLAY11: ATI Radeon HD 4800 Series (CRT Emudriver - WDDM v1.1) (PCI\VEN_1002&DEV_9460&SUBSYS_E115174B&REV_00)
SwitchRes: Device key: System\CurrentControlSet\Control\Video\{386CE5A2-F4B0-4E18-B48A-A365149C83DA}\0000
ATI legacy init
Switchres: Searching for custom video modes...
Switchres: [ 1] 640x 480 @ 59 : system mode
Switchres: [ 2] 640x 480 @ 60* : system mode
Switchres: [ 3] 640x 480 @ 72 : system mode
Switchres: [ 4] 640x 480 @ 75 : system mode
Switchres: [ 5] 720x 480 @ 60 : system mode
Switchres: [ 6] 768x 480 @ 60 : ATI legacy timing "768x480_60 15.690000KHz 60.000000Hz" 15.690000 768 800 872 1000 480 483 489 523 interlace -hsync -vsync
Switchres: [ 7] 800x 480 @ 60 : ATI legacy timing "800x480_60 15.692000KHz 60.007648Hz" 16.320000 800 832 912 1040 480 483 489 523 interlace -hsync -vsync
Switchres: [ 8] 800x 600 @ 56 : system mode
Switchres: [ 9] 800x 600 @ 60 : system mode
Switchres: [ 10] 800x 600 @ 70 : system mode
Switchres: [ 11] 800x 600 @ 72 : system mode
Switchres: [ 12] 800x 600 @ 75 : system mode
Switchres: [ 13] 1024x 768 @ 60 : system mode
Switchres: [ 14] 1024x 768 @ 70 : system mode
Switchres: [ 15] 1024x 768 @ 72 : system mode
Switchres: [ 16] 1024x 768 @ 75 : system mode
Switchres: [ 17] 1152x 864 @ 60 : system mode
Switchres: [ 18] 1152x 864 @ 70 : system mode
Switchres: [ 19] 1152x 864 @ 75 : system mode
Switchres: [ 20] 1280x 720 @ 59 : system mode
Switchres: [ 21] 1280x 720 @ 60 : system mode
Switchres: [ 22] 1280x 800 @ 60 : system mode
Switchres: [ 23] 1280x 800 @ 75 : system mode
Switchres: [ 24] 1280x1024 @ 60 : system mode
Switchres: [ 25] 1280x1024 @ 70 : system mode
Switchres: [ 26] 1280x1024 @ 75 : system mode
SwitchRes: Found 2 custom of 26 active video modes
SwitchRes: Entering switchres_modeline_setup
SwitchRes: v0.017e:[donpachi] Calculating best video mode for 240x320@57.550644 orientation: rotated
SwitchRes: [ 640]x[ 480]_[59=59.000000Hz] - locked
SwitchRes: [ 640]x[ 480]_[60=60.000000Hz]
rng(0): out of range
SwitchRes: [ 640]x[ 480]_[72=72.000000Hz] - locked
SwitchRes: [ 640]x[ 480]_[75=75.000000Hz] - locked
SwitchRes: [ 720]x[ 480]_[60=60.000000Hz] - locked
SwitchRes: [ 768]x[ 480]_(60=60.000000Hz)
rng(0): 768 x 480_57.550644i 15.682550 [fract] scale(2, 1, 1) diff(11.11, 47.06, 0.0000) ratio(3.200, 1.500)
SwitchRes: [ 800]x[ 480]_(60=60.007648Hz)
rng(0): 800 x 480_57.550644i 15.682550 [fract] scale(2, 1, 1) diff(6.67, 47.06, 0.0000) ratio(3.333, 1.500)
SwitchRes: [ 800]x[ 600]_[56=56.000000Hz] - locked
SwitchRes: [ 800]x[ 600]_[60=60.000000Hz] - locked
SwitchRes: [ 800]x[ 600]_[70=70.000000Hz] - locked
SwitchRes: [ 800]x[ 600]_[72=72.000000Hz] - locked
SwitchRes: [ 800]x[ 600]_[75=75.000000Hz] - locked
SwitchRes: [1024]x[ 768]_[60=60.000000Hz] - locked
SwitchRes: [1024]x[ 768]_[70=70.000000Hz] - locked
SwitchRes: [1024]x[ 768]_[72=72.000000Hz] - locked
SwitchRes: [1024]x[ 768]_[75=75.000000Hz] - locked
SwitchRes: [1152]x[ 864]_[60=60.000000Hz] - locked
SwitchRes: [1152]x[ 864]_[70=70.000000Hz] - locked
SwitchRes: [1152]x[ 864]_[75=75.000000Hz] - locked
SwitchRes: [1280]x[ 720]_[59=59.000000Hz] - locked
SwitchRes: [1280]x[ 720]_[60=60.000000Hz] - locked
SwitchRes: [1280]x[ 800]_[60=60.000000Hz] - locked
SwitchRes: [1280]x[ 800]_[75=75.000000Hz] - locked
SwitchRes: [1280]x[1024]_[60=60.000000Hz] - locked
SwitchRes: [1280]x[1024]_[70=70.000000Hz] - locked
SwitchRes: [1280]x[1024]_[75=75.000000Hz] - locked
SwitchRes: [donpachi] (1) vertical (240x320@57.550644)->(800x480@57.550644)
rng(0): 800 x 480_57.550644i 15.682550 [fract] scale(2, 1, 1) diff(6.67, 47.06, 0.0000) ratio(3.333, 1.500)
SwitchRes: Modeline "800x480_60 15.682550KHz 57.550644Hz" 16.309852 800 832 912 1040 480 494 500 545 interlace -hsync -vsync
Switchres: saving ATI legacy timing "800x480_60 15.692000KHz 60.007648Hz" 16.320000 800 832 912 1040 480 483 489 523 interlace -hsync -vsync
Switchres: updating ATI legacy timing "800x480_60 15.682550KHz 57.550644Hz" 16.309852 800 832 912 1040 480 494 500 545 interlace -hsync -vsync
SwitchRes: Setting option -rotate
SwitchRes: Setting option -noror
SwitchRes: Setting option -noautoror
SwitchRes: Setting option -norol
SwitchRes: Setting option -noautorol
SwitchRes: Setting option -keepaspect
SwitchRes: Setting option -unevenstretch
SwitchRes: Setting option -nounevenstretchx
SwitchRes: Setting option -noblack_frame_insertion
SwitchRes: Setting option -syncrefresh
SwitchRes: Setting option -notriplebuffer
SwitchRes: Setting option -waitvsync
SwitchRes: Setting option -filter
Video: Monitor 1573455 = "\\.\DISPLAY10"
Video: Monitor 4522567 = "\\.\DISPLAY11" (primary)
Direct3D: Using Direct3D 9
Physical width 640, height 480
Direct3D: Initialize
Direct3D: Configuring adapter #1 = ATI Radeon HD 4800 Series (CRT Emudriver - WDDM v1.1)
Direct3D: Adapter has Vendor ID: 1002 and Device ID: 9460
Direct3D: Using dynamic textures
Direct3D: YUV format = RGB
Direct3D: Max texture size = 8192x8192
Direct3D: Device created at 800x480
Direct3D: First scanline: 25, Last scanline: 505, Break scanline: 505, Delay scanline: -29
Direct3D: Initialize HLSL
Direct3D: First store options
Direct3D: HLSL initialized
RawInput: APIs detected
RawInput: APIs detected
RawInput: APIs detected
stream_buffer_size = 37888
DirectSound: Primary buffer: 48000 Hz, 16 bits, 2 channels
Input: Adding keyboard #0: HID Keyboard Device (device id: \\?\HID#VID_046D&PID_C52B&MI_00#7&83342f0&0&0000#{884b96c3-56ef-11d1-bc8c-00a0c91405dd})
Input: Adding keyboard #1: HID Keyboard Device (device id: \\?\HID#VID_D209&PID_0450&MI_01#8&2c087890&0&0000#{884b96c3-56ef-11d1-bc8c-00a0c91405dd})
Input: Adding mouse #0: HID-compliant mouse (device id: \\?\HID#VID_046D&PID_C52B&MI_01&Col01#7&1ff6cf35&0&0000#{378de44c-56ef-11d1-bc8c-00a0c91405dd})
Input: Adding mouse #1: HID-compliant mouse (device id: \\?\HID#VID_D209&PID_0450&MI_02#8&38eab5a0&0&0000#{378de44c-56ef-11d1-bc8c-00a0c91405dd})
Input: Adding lightgun #0: HID-compliant mouse (device id: \\?\HID#VID_046D&PID_C52B&MI_01&Col01#7&1ff6cf35&0&0000#{378de44c-56ef-11d1-bc8c-00a0c91405dd})
Input: Adding lightgun #1: HID-compliant mouse (device id: \\?\HID#VID_D209&PID_0450&MI_02#8&38eab5a0&0&0000#{378de44c-56ef-11d1-bc8c-00a0c91405dd})
Input: Adding joystick #0: J-PAC (device id: J-PAC product_0450d209-0000-0000-0000-504944564944 instance_84924680-9d9b-11e7-800a-444553540000)
Direct3D: Error 88760868 during device present call
Region ':maincpu' created
un7z: opened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
Region ':sprites0' created
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
Region ':layer0' created
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
Region ':layer1' created
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
Region ':layer2' created
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
Region ':oki1' created
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
Region ':oki2' created
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
Region ':eeprom' created
Direct3D: resetting device
Direct3D: Initialize HLSL
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
Region ':pal' created
un7z: found roms\donpachi.7z in cache
un7z: reopened archive file roms\donpachi.7z
un7z: closing archive file roms\donpachi.7z and sending to cache
Starting DonPachi (US) ':'
Optional device ':soundlatch' not found
Optional device ':int_timer_right' not found
Optional device ':int_timer_left' not found
Optional device ':oki' not found
Optional device ':audiocpu' not found
Optional shared pointer ':paletteram.3' not found
Optional shared pointer ':paletteram.2' not found
Optional shared pointer ':paletteram.1' not found
Optional shared pointer ':spriteram_2.3' not found
Optional shared pointer ':spriteram_2.2' not found
Optional shared pointer ':spriteram_2.1' not found
Optional shared pointer ':spriteram.3' not found
Optional shared pointer ':spriteram.2' not found
Optional shared pointer ':spriteram.1' not found
Optional shared pointer ':vctrl.3' not found
Optional shared pointer ':vram.3' not found
Optional shared pointer ':videoregs.3' not found
Optional shared pointer ':videoregs.2' not found
Optional shared pointer ':videoregs.1' not found
(missing dependencies; rescheduling)
Starting M68000 ':maincpu'
Starting Serial EEPROM 93C46 (64x16) ':eeprom'
Starting Timer ':int_timer'
Starting Video Screen ':screen'
Starting gfxdecode ':gfxdecode'
Starting palette ':palette'
Optional memory region ':palette:finder_dummy_tag' not found
Starting Speaker ':mono'
(missing dependencies; rescheduling)
Starting OKI MSM6295 ADPCM ':oki1'
Starting OKI MSM6295 ADPCM ':oki2'
Starting NMK112 ':nmk112'
Starting DonPachi (US) ':'
Optional device ':soundlatch' not found
Optional device ':int_timer_right' not found
Optional device ':int_timer_left' not found
Optional device ':oki' not found
Optional device ':audiocpu' not found
Optional shared pointer ':paletteram.3' not found
Optional shared pointer ':paletteram.2' not found
Optional shared pointer ':paletteram.1' not found
Optional shared pointer ':spriteram_2.3' not found
Optional shared pointer ':spriteram_2.2' not found
Optional shared pointer ':spriteram_2.1' not found
Optional shared pointer ':spriteram.3' not found
Optional shared pointer ':spriteram.2' not found
Optional shared pointer ':spriteram.1' not found
Optional shared pointer ':vctrl.3' not found
Optional shared pointer ':vram.3' not found
Optional shared pointer ':videoregs.3' not found
Optional shared pointer ':videoregs.2' not found
Optional shared pointer ':videoregs.1' not found
(missing dependencies; rescheduling)
Starting Speaker ':mono'
Starting DonPachi (US) ':'
Optional device ':soundlatch' not found
Optional device ':int_timer_right' not found
Optional device ':int_timer_left' not found
Optional device ':oki' not found
Optional device ':audiocpu' not found
Optional shared pointer ':paletteram.3' not found
Optional shared pointer ':paletteram.2' not found
Optional shared pointer ':paletteram.1' not found
Optional shared pointer ':spriteram_2.3' not found
Optional shared pointer ':spriteram_2.2' not found
Optional shared pointer ':spriteram_2.1' not found
Optional shared pointer ':spriteram.3' not found
Optional shared pointer ':spriteram.2' not found
Optional shared pointer ':spriteram.1' not found
Optional shared pointer ':vctrl.3' not found
Optional shared pointer ':vram.3' not found
Optional shared pointer ':videoregs.3' not found
Optional shared pointer ':videoregs.2' not found
Optional shared pointer ':videoregs.1' not found
Switchres: restoring ATI legacy timing "800x480_60 15.692000KHz 60.007648Hz" 16.320000 800 832 912 1040 480 483 489 523 interlace -hsync -vsync