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08fdc65d69
Fixes Tsunami demo Waiting for RDY while the interrupt already asserted causes too much delay. The interrupt cycle will still start at the correct position, as soon as the RDY line is de-asserted, and other conditions are satisfied.
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-- 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)
--
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--
-- 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
--
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FPGA64_027 Keyboard specific keys :
Escape : run stop
[ : @
] : *
\ : up arrow
' : semi colon
` : left arrow
F9 : £
F10 : +
Left Alt : commodore key
END