# Wheel and Clipboard Bridge

## Clipboard

Windows 98 has no supported VirtualBox Guest Additions clipboard provider. The
working path is therefore the private bridge at `10.0.2.2:8891` (NAT) or
`192.168.56.1:8891` (host-only). The authenticated endpoints are:

* `GET /clipboard` returns the host XFCE clipboard as bounded CP1252 text.
* `POST /clipboard` with `Content-Type: text/plain` replaces the host clipboard.

`SOLCLIPBOARD.EXE` polls once per second, copies `CF_TEXT` in both directions,
and caps transfers at 64 KiB. It is installed as
`C:\SOLCHAT98\SOLCLIPBOARD.EXE` and can be placed in the Windows 98 Startup
folder. The H: share is used to distribute the binary; clipboard state itself
travels over HTTP so the read-only share is not a limitation.

Host source: `/home/david/sol98-chat-app/solclipboard.c`.
Guest binary: `/home/david/sol98-chat-app/SOLCLIPBOARD.EXE`.
Installer copy: `guest/cd-root/SOLCLIPBOARD.EXE`.

## Wheel

The overlay first sends an absolute reposition followed by a relative VirtualBox
wheel delta. Because the current Win98 USB-tablet stack may discard that packet,
it also sends PageUp/PageDown for focused list and document controls. Disable
the fallback with `SOL98_SEAMLESS_WHEEL_KEYS=0` when a real wheel-aware driver is
installed. Keep seamless mode on `--mouse=usbtablet` with `--usbohci on`;
PS/2 requires capture in the normal frontend and breaks absolute overlay
clicks. Microsoft IntelliPoint 4.12 for Windows 98 remains a period-compatible
wheel enhancement if a physical wheel model is later presented.