Very much WIP. Current state of play:
- Boots and supports Basic program entry
- Support for Modes 0-6 (no TTX yet)
- No Audio
- Cassette in progress. There is a janky short cut to load data from UEF file into memory bypassing the Serial ULA
- Full debugger with breakpoints etc.
You'll need two ROMs, the OS1.2 and Basic ROMs. Drop them in a data directory under bin
data/os120.bin
data/Basic2.rom
Then run ./beeb Defualt boot mode is mode 0 but you can specify an alternative on the command prompt.
Sadly no satisfying be-boop yet.
View - shows various other windows
View Debugger shows a simple debugger. It shows a disassembly of the memory and the PC and other registers at the bottom of the window
Pause stops execution
Run resumes
Step and Step out do the obvious thing.
If you want to make life easier for yourself, you can load OS symbols from mos_symbols.txt (taken from the Brilliant TobyLobster's ROM disassembly https://tobylobster.github.io/mos/mos/index.html)
Set a breakpoint by clicking to the left of the memory address or using the Debugger->Add Breakpoint menu option. This menu also allows you to
- Save and load breakpoints.
- Add watchpoints (execution will pause when a watched memory address changes)
- Add Log Points (log an address content when the PC has a particular value)
Debugger->Show History dumps the contents of a circular buffer containing the last 100 instructions executed
Starts logging every instruction to stdout as it executes. Lots of data. Not recommended.
A memory inspector. View the contents of RAM.
Allows you to load a UEF file and see the contents. ![[images/cassette.png]]Sadly does not yet support loading from the Beeb via LO."" or CH."" -- cursed sula timing bug to resolve -- but you can press "Load File" to pull the data directly into RAM (at the address listed in the UEF window) For BASIC programs you can then
PA.=&1900
LIST
RUN
Where &1900 should be the address at which you loaded the code.
