PiTubeDirect
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hoglet67
Bare-metal Raspberry Pi project that attaches to the Acorn TUBE interface and emulates many BBC Micro Co Processors
Hit this by switching from the 6502 to to the PDP11 without doing a Ctrl-BREAK (justr a normal BREAK) For some reason (a bug in 0.28 of the PDP Tube...
The MiniRV32 core supports timer interrupts
For example, implement ECALL A7=&AC0010 in a user program
The main wiki page is very old now, and really needs re-writing in the light of all the recent developments. There is much information there that is duplicated elsewhere on...
Need to allocate a double-sized frame buffer, and implement OSBYTEs &70 and &71, to allow a fast flip to a pre-drawn screen and to send VDU output to the not-visible...
This issue is a bit of a dumping round for finishing off the frame buffer work. See also a more upto date list here: https://github.com/hoglet67/PiTubeDirect/wiki/Pi-VDU-Driver#known-issues At some point, we should...
(The title says it all, really!) With the the Frame Buffer in MODE 7, Shift+F7/F8/F9 do COPY, left cursor and right cursor rather than select white, flash and no flash....
Not all the APIs that BBC Basic uses are currently implemented. (Updated 7/9/2021) There are implemented: ``` (Operating System) 00 WRITEC 01 WRITES 02 WRITE0 03 NEWLINE 04 READC 05...
Native ARM Co Pro: Add Pi Type to OSBYTE A=-00 Response So native code running on the Pi can use an appropriate IO address e.g. for Audio
Running FBAS135 results in the Pi hitting a native exception, because the Pi supports VFP for floating point but code for earlier ARMs uses FPA. See [here](http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0056d/Bcfbhjif.html). ``` SWI 0002006e...