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C64 core
This project forked from mist-devel/c64
C64 core
--------------------------------------------------------------------------------- -- FPGA64_027 and 1541_SD by Dar ([email protected]) release 0001- 26/07/2015 -- -- http://darfpga.blogspot.fr -- -- FPGA64 is Copyrighted 2005-2008 by Peter Wendrich ([email protected]) -- http://www.syntiac.com/fpga64.html -- -- Main features -- 15KHz(TV) / 31Khz(VGA) -- PAL(50Hz) / NTSC(60Hz) -- PS2 keyboard input with portA / portB joystick emulation -- SID sound output -- -- -- Internal emulated 1541 on raw SD card (READ ONLY) : D64 images start at 256KB boundaries -- Use hexadecimal disk editor such as HxD (www.mh-nexus.de) to build SD card. -- Cut D64 file and paste at 0x00000 (first), 0x40000 (second), 0x80000 (third), -- 0xC0000(fourth), 0x100000(fith), 0x140000 (sixth) and so on. -- BE CAREFUL NOT WRITING ON YOUR OWN HARDDRIVE -- -- Use only SIMPLE D64 files : 174 848 octets (without disk error management) -- --------------------------------------------------------------------------------- -- -- c1541_sd reads D64 data from raw SD card, produces GCR data, feeds c1541_logic -- Raw SD data : each D64 image must start on 256KB boundaries -- disk_num allow to select D64 image -- -- c1541_logic from : Mark McDougall -- spi_controller from : Michel Stempin, Stephen A. Edwards -- via6522 from : Arnim Laeuger, Mark McDougall, MikeJ -- T65 from : Daniel Wallner, MikeJ, ehenciak -- -- c1541_logic modified for : slow down CPU (EOI ack missed by real c64) -- : remove IEC internal OR wired -- : synched atn_in (sometime no IRQ to CPU with real c64) -- spi_controller modified for : sector start and size adapted + busy signal -- via6522 modified for : no modification -- --------------------------------------------------------------------------------- FPGA64_027 Keyboard specific keys : Escape : run stop [ : @ ] : * \ : up arrow ' : semi colon ` : left arrow F9 : £ F10 : + Left Alt : commodore key END
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