-- FPGA64_027 and 1541_SD by Dar (darfpga@aol.fr) release 0001- 26/07/2015

-- http://darfpga.blogspot.fr

-- FPGA64 is Copyrighted 2005-2008 by Peter Wendrich (pwsoft@syntiac.com) -- 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