[Request] Screen Garbled with DosBox

Fellow nerds I'm reaching out for some help.

I'm trying to set up a Raspberry Pi 4 with an old CRT monitor. It's caused some headaches getting the micro-HDMI-to-VGA adapter to work with the old monitor. After finagling with the config.txt on the pi, I was able to get the thing to boot to a usable terminal. I had to disable the vc4-kms-v3d-pi4 dtoverlay. Any attempt to enable that driver causes the screen to tear/roll and is unreadable. Also, I have no desktop environment installed, it's just the terminal.

So that brings me to my current predicament. The photo attached shows what happens when I run dosbox. Clearly, that ain't right. I've looked through the documentation and have adjusted the config files, but clearly I'm missing something. Any ideas?

Here are the configs I'm using:

Raspberry Pi config.txt

# For more options and information see
# http://rptl.io/configtxt
# Some settings may impact device functionality. See link above for details

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

# Additional overlays and parameters are documented
# /boot/firmware/overlays/README

# Automatically load overlays for detected cameras
camera_auto_detect=1

# Automatically load overlays for detected DSI displays
display_auto_detect=1

# Automatically load initramfs files, if found
auto_initramfs=1

# Enable DRM VC4 V3D driver
#dtoverlay=vc4-fkms-v3d-pi4
max_framebuffers=2

# Don't have the firmware create an initial video= setting in cmdline.txt.
# Use the kernel's default instead.
disable_fw_kms_setup=1

# Run in 64-bit mode
arm_64bit=1

# Disable compensation for displays with overscan
# disable_overscan=1

# Run as fast as firmware / board allows
arm_boost=1

# HDMI Stuff
#hdmi_safe=1
hdmi_force_hotplug=1
hdmi_ignore_edid=0xa5000080
config_hdmi_boost=4
hdmi_group=2
hdmi_mode=9
disable_overscan=0
overscan_left=24
overscan_right=24
overscan_top=24
overscan_bottom=24 

[cm4]
# Enable host mode on the 2711 built-in XHCI USB controller.
# This line should be removed if the legacy DWC2 controller is required
# (e.g. for USB device mode) or if USB support is not required.
otg_mode=1

[all]

DosBox Config File

[sdl]
fullscreen=true
fulldouble=false
usescancodes=false
output=overlay

[dos]
keyboardlayout=us

[render]
aspect=true