little corrections
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README.md
31
README.md
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@ -4,7 +4,7 @@
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After [reinette](https://github.com/ArthurFerreira2/reinette) (Apple 1 emulator) and [reinette II](https://github.com/ArthurFerreira2/reinette-II) (the text only Apple II emulator), I am proud to release reinette II plus, a french\* Apple II plus emulator using SDL2.
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After [reinette](https://github.com/ArthurFerreira2/reinette) (Apple 1 emulator) and [reinette II](https://github.com/ArthurFerreira2/reinette-II) (the text only Apple II emulator), I am proud to release **reinette II plus**, a french\* Apple II plus emulator using SDL2.
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\* reinette has two meanings in french : it's a little frog but also a delicious kind of apple
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@ -26,13 +26,13 @@ You only need SDL2 to compile it. (I'm not using SDL_Mixer, but only the native
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This emulator is not accurate in many ways and does not compete with
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[AppleWin](https://github.com/AppleWin/AppleWin), [Epple](https://github.com/cmosher01/Epple-II) or [LinApple](https://github.com/linappleii/linapple). Better use one of them if you want a better Apple ][ experience.
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[AppleWin](https://github.com/AppleWin/AppleWin), [Epple](https://github.com/cmosher01/Epple-II) or [LinApple](https://github.com/linappleii/linapple). Better use one of them if you want a good Apple ][ emulation experience.
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I wrote it in the goal to better understand the Apple ][ internals, and I'm publishing the sources in the hope they will be of any help.
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I wrote it with the goal to better understand the Apple ][ internals, and I'm publishing the sources in the hope they will be of any help.
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It's compact, less 800 SLOC, with two source files only, one for the CPU emulation, the other for the computer itself.
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It's compact, less than 1000 SLOC, with two source files only, one for the CPU emulation, the other for the computer itself.
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I did my best to comment everything, and if you have an idea of how an Apple ][ works, it should be easy for you to understand the code, modify and enhance it for your needs (see TODO section).
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I did my best to comment the code, and if you have an idea of how an Apple ][ works, it should be easy for you to understand the code, modify and enhance it for your needs (see TODO section).
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### Startup
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@ -48,6 +48,7 @@ Drop the file while pressing the ALT key to insert it into drive 2
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Use the functions keys to control the emulator itself
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```
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* F1 : writes the changes of the floppy in current drive back to host
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* F4 : paste text from clipboard
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* F5 : zoom out down to 1:1
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* F6 : zoom in, no magnification limit
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* F7/F8 : adjust joystic trim
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@ -66,13 +67,13 @@ Paddles / Joystic :
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* ALT : button 1
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```
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### limitations
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### Limitations
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* high pitch noise at high volume (might be related with my environment)
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* sound cracks when playing for long period (intro music for example)
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* CPU is not 100% cycle accurate - see source file for more details
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* colors are approximate (taken from a scan of an old Beagle bros. poster)
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* HGR is inhacurate, and does not implement color clashing
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* HGR video is inaccurate, and does not implement color clashing
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* disk ][ access is artificially accelerated
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* only support .nib floppy images. (you can use [CiderPress](https://github.com/fadden/ciderpress) to convert your images to this format)
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* only has 48KB of RAM (can't run some software requiring the language card)
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@ -81,14 +82,20 @@ Paddles / Joystic :
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### To do :
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* warn if you quit the application with unsaved floppy changes
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* give the user the option to switch to the original Apple II rom
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* give a warning if the application exits with unsaved floppy changes
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* give the user the option to start with the original Apple II rom
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* colors where taken from an old Beagle Bros poster, find more accurate RGB values.
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* implement color clashing in HGR
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* optimize sound generation
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* optimize disk access (actually a bit artificial)
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* optimize disk access (speed is actually a bit artificial)
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* re-implement Paddles and Joystic support for a better analog simulation
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* implement a language card to extend the RAM of reinette II plus to 64K and support more sofware.
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* implement the language card and extend the RAM of **reinette II plus** to 64K to support more sofware.
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* for 6502 coders :
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* add the ability to insert a binary file at a specified address
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* dump regs, soft swithes and specified memory pages to console
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Follow me to keep updated !
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\
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\
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\
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*simplicity is the ultimate sophistication*
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@ -353,8 +353,16 @@ int main(int argc, char *argv[]){
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switch (event.key.keysym.sym){
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// EMULATOR CONTROL :
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case SDLK_INSERT: // Shift+Insert => paste txt
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if (shift && SDL_HasClipboardText()){
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case SDLK_F1: // save curDrv back to host
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if (disk[curDrv].filename[0] && !disk[curDrv].readOnly)
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if((f = fopen(disk[curDrv].filename, "wb"))){
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fwrite(disk[curDrv].data, 1, 232960, f);
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fclose(f);
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}
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break;
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case SDLK_F4: // paste txt from clipboard
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if (SDL_HasClipboardText()){
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char *clipboardText = SDL_GetClipboardText();
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int c = 0;
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while (clipboardText[c]){ // all chars until ascii NUL
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@ -366,14 +374,6 @@ int main(int argc, char *argv[]){
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}
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break;
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case SDLK_F1: // save curDrv back to host
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if (disk[curDrv].filename[0] && !disk[curDrv].readOnly)
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if((f = fopen(disk[curDrv].filename, "wb"))){
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fwrite(disk[curDrv].data, 1, 232960, f);
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fclose(f);
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}
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break;
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case SDLK_F5: if ((zoom-=2) < 0) zoom = 0; // zoom out
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case SDLK_F6: if (++zoom > 8) zoom = 8; // zoom in
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SDL_SetWindowSize(wdo, 280*zoom, 192*zoom);
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@ -389,7 +389,7 @@ int main(int argc, char *argv[]){
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softSwitches(0xC0E9,0); // drive0
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break;
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case SDLK_F11: puce6502Break(); break; // break
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case SDLK_F11: puce6502Break(); break; // break
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case SDLK_F12: running = false; break; // exit ...
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// EMULATED KEYS :
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