INMOS XGA emulation is broken #4870

[INMOS XGA (ISA)]
type = 1
instance = 6
ext_mem_addr = 00F0
dma = 7

[Microsoft Serial Mouse]
port = 0
buttons = 2

[General]
vid_renderer = qt_software
host_cpu = AMD Ryzen 7 5800H with Radeon Graphics         
uuid = caf5d46d-be56-59ea-99b7-1ef57ddc156f
force_43 = 1
language = system

[Machine]
machine = acc386
cpu_family = i386dx
cpu_speed = 40000000
cpu_multi = 1
cpu_use_dynarec = 0
fpu_softfloat = 0
time_sync = local
mem_size = 8192

[Video]
gfxcard = inmos_xga_isa

[Input devices]
mouse_type = msserial

[Sound]
fm_driver = nuked

[Network]
net_01_link = 0
net_02_link = 0
net_03_link = 0
net_04_link = 0

[Ports (COM & LPT)]
lpt1_device = dot_matrix

[Storage controllers]
hdc = st506_at
cassette_mode = load

[Hard disks]
hdd_01_parameters = 17, 7, 855, 0, mfm
hdd_01_fn = disk.img
hdd_01_mfm_channel = 0

[Floppy and CD-ROM drives]
fdd_01_type = 35_2hd
fdd_01_turbo = 1
fdd_02_type = 525_2hd
fdd_02_turbo = 1