1 byte = 2 pixels

560x448@4bpp = 125 440 bytes
560x448@8bpp = 250 880 bytes

-> 262144 bytes (256 kB)

[USER AREA | HW AREA]

    Number of pheripherals = 8, of which the computer itself is considered as
     a peripheral.

HW AREA = [Peripherals | MMIO | INTVEC]

User area: 8 MB, hardware area: 8 MB

8192 kB
    User Space
1024 kB
    Peripheral #8
1024 kB
    Peripheral #7
...
1024 kB
    MMIO and Interrupt Vectors
    128 kB
        MMIO for Peri #8
    128 kB
        MMIO for Peri #7
    ...
    128 kB
        MMIO for the computer
        130816 bytes
            MMIO for Ports, etc.
        256 bytes
            Vectors for 64 interrupts

--------------------------------------------------------------------------------

VRAM Bank 0 (256 kB)

Endianness: little

From the start of the memory space:
250880 bytes
    Framebuffer
3 bytes
    *reserved for future use*
1 byte
    command (writing to this memory address changes the status)
        1: reset palette to default
        2: fill framebuffer with given colour (arg1)
2 bytes
    argument for "command" (arg1: Byte, arg2: Byte)
    write to this address FIRST and then write to "command" to execute the command
86 bytes
    *Unused*
IF graphics_mode THEN
    (41 sprites : 260 bytes each -> 10660 bytes)
        0th sprite is always the GUI cursor
    2 bytes
        Ob hv0000xy yyyyyyyy (h: horizontal flip, v: vertical flip, x: show/hide, y: y-position)
    2 bytes
        0b rr0000xx xxxxxxxx (r: rotation, x: x-position)
    256 bytes
        16x16 texture for the sprite
ELSE
    2978 bytes
        *Unused*
    2 bytes
        Cursor position in: (y*32 + x)
    2560 bytes
        Text foreground colours
    2560 bytes
        Text background colours
    2560 bytes
        Text buffer of 70x32 (8x14 character size, and yes: actual character data is on the bottom)
FI
512 bytes
    Palette stored in following pattern: 0b rrrr gggg, 0b bbbb aaaa, ....
    Palette number 255 is always full transparent (bits being all zero)

MMIO

2 bytes RO
    Framebuffer width in pixels
2 bytes RO
    Framebuffer height in pixels
1 bytes RO
    Text mode columns
1 bytes RO
    Text mode rows
1 bytes RW
    Text-mode attributes
    0b kkkk 00rc (k: currently using character rom, r: TTY Raw mode, c: Cursor blink)
1 bytes RW
    Graphics-mode attributes
    0b 0000 000g (g: Use sprites(wipes out text buffer))
1 bytes RO
    Last used colour (set by poking at the framebuffer)
1 bytes RW
    current TTY foreground colour (useful for print() function)
1 bytes RW
    current TTY background colour (useful for print() function)

Text-mode-font-ROM is immutable and does not belong to VRAM
Even in the text mode framebuffer is still being drawn onto the screen, and the texts are drawn on top of it