6502/SixtyPical
1
0
Fork 0
mirror of https://github.com/catseye/SixtyPical.git synced 2025-03-09 19:30:53 +00:00
Code Issues Projects Releases Wiki Activity

Update HISTORY and README.

Browse Source
This commit is contained in:
Chris Pressey 2015-10-22 19:20:48 +01:00
parent 33d72c0692
commit 421727e107
2 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
HISTORY.markdown
View File

@ -8,6 +8,7 @@ History of SixtyPical
* Both routines and vectors can declare `inputs`, `outputs`, and `trashes`, * Both routines and vectors can declare `inputs`, `outputs`, and `trashes`,
and these must be compatible to assign a routine or vector to a vector. and these must be compatible to assign a routine or vector to a vector.
* Added `goto` (tail call) instruction, jumps to routine or through vector. * Added `goto` (tail call) instruction, jumps to routine or through vector.
* `call` can call a subroutine indirectly, via a vector.
* Routine name is now shown in analysis error messages. * Routine name is now shown in analysis error messages.
0.5 0.5

20
README.markdown
View File

@ -8,8 +8,19 @@ In practice, this means it catches things like
* you forgot to clear carry before adding something to the accumulator * you forgot to clear carry before adding something to the accumulator
* a subroutine that you call trashes a register you thought was preserved * a subroutine that you call trashes a register you thought was preserved
* you tried to write the address of something that was not a routine, to
a jump vector
and suchlike. and suchlike. It also provides some convenient operations and abstractions
based on common machine-language programming idioms, such as
* copying values from one register to another (via a third register when
there are no underlying instructions that directly support it)
* explicit tail calls
* indirect subroutine calls
The reference implementation can execute, analyze, and compile SixtyPical
programs to 6502 machine code.
It is a **work in progress**, currently at the **proof-of-concept** stage. It is a **work in progress**, currently at the **proof-of-concept** stage.
@ -33,16 +44,13 @@ TODO
For 0.6: For 0.6:
* `call` vector (generates an JSR to a trampoline that does indirect JMP.)
* routines shouldn't need to be listed as inputs. * routines shouldn't need to be listed as inputs.
* A more involved demo for the C64 — one that sets up an interrupt.
For 0.7: For 0.7:
* A more involved demo for the C64 — one that sets up an interrupt?
For 0.8:
* `word` type. * `word` type.
* `word table` type.
* `trash` instruction. * `trash` instruction.
* zero-page memory locations. * zero-page memory locations.
* indirect addressing. * indirect addressing.