- "mode PLAY" is now a synonym for "mode RUN"
o chip memory
- implemented PeriphBus interface
- controller now uses PeriphBus interface
- panel now uses PeriphBus interface
o hardware
- consolidated controller and panel packages into peripheral
package
o assert
- added GetGoRoutineID function to help with debugging/testing
- not for general use. it's too slow and in bad taste
- added universal symbols file
- chip memory definitions no longer include symbol definitions.
they use the new universal symbols file
o cpu
- moved instruction_result from cpu package to result package
o disassembly
- style parameters moved to new result package
o memory / debugger
- improved PEEK command implementation
- can now use symbolic addresses
- removed chipWriteRegisters map. ChipWrite() now requires a
uint16 value, given by the "chip write registers" enumerations.
significant speed increase due to no longer having to access a
map multiple times every video cycle
- added ONSTEP command. similar to ONHALT but run every step
- implemented LAST command. debugger no longer runs the result
of the last instruction unless it is part of the ONSTEP
command sequence
- fixed printing of HEX. step mode video no longer crashes if
print style includes hex.
o video
- sketched in collisions support
o cpu
- BIT instruction fixed (zero flag is result of AND with
accumulator but sign and overflow flags are set with
reference to the value from memory)
- symbol loading
- printing of disassembly now uses symbols (if available)
- run mode disasm now works as expected
o errors
- added GopherError - started to replace calls to fmt.Errorf()
with instantiations of GopherError
o debugger
- prompt now shows (brief) disassembly of next instruction to be
executed
- debugger can be launched without specifying a cartridge
- tidied up commands package
- sketched in filename tab-completion
- corrected tab-completion comments
- tidied up ansi module
o breakpoints / traps
- corrected comments
- fixed multiple traps
o lint check
- tidy up in response to lint check
o reverted String() to use MachineInfo() rather than MachineInfoTerse()
- video stepping doesn't callback to debugger when CPU isn't ready (like cpu
stepping)
- RIOT now only runs once per CPU cycle, instead of once per video cycle
timer now runs as expected
o tia/video
- tidied up sprite types for easier debugging/thinking
o television
- MachineInfo* now reports on whether tv is performing out-of-spec
o sdl tv
- added overlays
- cursor
- screen boundary
- pixel guide
o debugger
- replaced strings.Split(s, " ") and a small amount of post-processing,
with a single call to strings.Fields() - I've just discovered it.
- added STEPMODE command
- STEPMODE VIDEO will now print video step result (what it can of instruction
result)
- implemented script loading and running - no SCRIPT command just yet though
this is intended for initialisation for the time being
- added VERBOSITY and DEBUGGERSTATE commands
o cpu
- better, more complete, printing for instruction result
o sprite/drawSig
- counting drawSig the wrong way, causing pixels in sprites to be
flipped horizontally
- implemented video stepping
- STEP command now has optional argument CPU or VIDEO
- subsequent calls to STEP (or implied STEP) will default to previous
selection of STEP CPU or STEP VIDEO
o changed vcs.go and gopher.go to reflect changes required by video
stepping implementation
o debugger
- ONBREAK now called ONHALT
- ONHALT command sequence can now be specified
- first version - simply to get something onto the screen
- embeds headlessTV
o HeadlessTV
- implemented TVState type for frameNum, scanline and horizPos fields
- TVState satisfies BreakTarger interface in the debugger
o Breakpoints
- altered breakpoint to account for changes made for TVState
o Debugger
- implemented SHOW and HIDE
o clarified commentary
- implemented video in part
- implemented sprite framework - ball sprite completed
- reorganised existing tia code in repsonse to new code
o debugger
- tweaked existing commands and how they work
- implemented headless TV
o debugger
- VERBOSE is now called HALT - as in "auto command halt"
- no way of setting what command(s) to run on halt just yet
- a real verbose command that flips between verbose and terse printing
of machine state
o polycounter
- separated Reset() and SetResetPattern()
- filled in more of the TIA implementation
- RSYNC works correctly
- polycounter and other components altered as required
o television
- sketched in television interface
- implemented dummy television
o debugger
- syntax normalisation -- allowing variations in how we specify hex numbers
- added VERBOSE command
o renamed mflib package to assert
- Assert function renamed to CheckValueVCS
- added MEMMAP command
o tidy up
- changed pointer recievers to value receivers when the method does
not mutate the type instance
- I'm not sure about this but I like if for now - this way it is
clearer, to me at least, which methods mutate and which don't
o memory
- small reorganisation of memory package in preparation for
implementation of the video chips
o renamed project to "gopher2600"
- removed go routine implementation of cycle stepping; far too slow
- replaced with a callback implementation. I'm thinking that it might
not be as flexible but that in the long run that it doesn't matter.
besides, the speed difference is definitely worth it.
- reorganised register implementation
- existing implementation now call rbits
- added an implementation called r16bits, using uint16 intead of a
bit array
- only implemented Load(), Add() and the To*() methods
- just enough to speed up programme counter operations
- now sends a reference to InstructionResult over the result channel,
rather than a copy
o cpu
- adjusted register declarations to match changes in registers
implementation
o mflib
- consolidated assert() function into one package
o debugger
- sketched in debugger
- added basic input loop
- primitive but effective FPS test
- added cpu profiler generator
o vcs
- cartridge attachment working properly
- now read reset address when machine is reset
o cpu
- fixed branching
- backward jumps weren't working
- cycle count sometimes wrong
- fixed cycle counts for pre-index and post-index addressing
o
- refinements
- added white-box testing
o cpu
- moved cpu definitions into its own package
- no longer requires csv file at run time
- csv parser moved into a code generator, embedding the data into
the code
- needs refinement
