6502/CLK

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Thomas Harte d72287a776 Looked up normal retrace time (it's a lot less than 16µs and 26 scanlines — more like 7 and 10) and that the visible portion of a line is defined to start about 12 µs after the start of hsync, put the first two numbers into my CRT to make that more accurate, then derived a newer guess about what the Atari 2600 does for each of its 228 cycles. The text version of a frame is now looking pretty good. So it's probably time to hit OpenGL and the OS X side of things. Though I'll have a quick look to find out whether I can learn the exact real Atari 2600 timings before moving on.

2015-07-23 19:24:25 -04:00

Looked up normal retrace time (it's a lot less than 16µs and 26 scanlines — more like 7 and 10) and that the visible portion of a line is defined to start about 12 µs after the start of hsync, put the first two numbers into my CRT to make that more accurate, then derived a newer guess about what the Atari 2600 does for each of its 228 cycles. The text version of a frame is now looking pretty good. So it's probably time to hit OpenGL and the OS X side of things. Though I'll have a quick look to find out whether I can learn the exact real Atari 2600 timings before moving on.

2015-07-23 19:24:25 -04:00

Reintroduced a console examination of the output runs being received after fixing a failure to complete or restart frames over in the CRT; weirdly it seems that sync is being obeyed but raster position is off. So work to do.

2015-07-22 20:45:10 -04:00

Looked up normal retrace time (it's a lot less than 16µs and 26 scanlines — more like 7 and 10) and that the visible portion of a line is defined to start about 12 µs after the start of hsync, put the first two numbers into my CRT to make that more accurate, then derived a newer guess about what the Atari 2600 does for each of its 228 cycles. The text version of a frame is now looking pretty good. So it's probably time to hit OpenGL and the OS X side of things. Though I'll have a quick look to find out whether I can learn the exact real Atari 2600 timings before moving on.

2015-07-23 19:24:25 -04:00

Processors/6502

Imported what little I have so far in the way of a memory-access cycle complete 6502 and just enough of a pretend Atari 2600 on top to be able to see some playfields in ASCII art.

2015-07-16 19:56:02 -04:00

.gitignore

Imported what little I have so far in the way of a memory-access cycle complete 6502 and just enough of a pretend Atari 2600 on top to be able to see some playfields in ASCII art.

2015-07-16 19:56:02 -04:00

LICENSE

Initial commit

2015-07-16 19:46:52 -04:00

README.md

Create README.md

2015-07-16 19:47:37 -04:00

README.md

CLK

An attempt to unify my various bits of emulation; we'll see.

Description

A latency-hating emulator of 8- and 16-bit platforms: the Acorn Electron, Amstrad CPC, Apple II/II+/IIe and early Macintosh, Atari 2600 and ST, ColecoVision, Enterprise 64/128, Commodore Vic-20 and Amiga, MSX 1, Oric 1/Atmos, Sega Master System, Sinclair

6502 68000 acorn-electron amstrad-cpc apple2 appleii atari-st atari2600 colecovision composite-video emulator m68k master-system msx oric vic20 z80 zx-spectrum zx80 zx81

Readme 501 MiB

Languages

C++ 77.1%

Objective-C++ 13%

Swift 3.9%

Assembly 2.9%

Objective-C 1.4%

Other 1.6%