hg80 1.0.0

Z80 and Z80N CPU core, stepped one clock edge at a time
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59

hg80
Copyright (c) 2026 captainblack

This product is licensed under either of Apache License, Version 2.0 or the MIT
license, at your option. See LICENSE-APACHE and LICENSE-MIT.

────────────────────────────────────────────────────────────────────────────────
THIRD-PARTY NOTICES
────────────────────────────────────────────────────────────────────────────────

This product contains work derived from the T80 Z80-compatible microprocessor
core, obtained from OpenCores, and from the T80N modifications made for the
ZX Spectrum Next Project. That work is redistributed here under the three-clause
BSD licence reproduced below, whose terms are additional to, and independent of,
the licence covering the remainder of this product.

    Z80 compatible microprocessor core

    Copyright (c) 2001-2002 Daniel Wallner (jesus@opencores.org)

    Modifications for the ZX Spectrum Next Project
    Copyright 2020 Fabio Belavenuto, Victor Trucco, Charlie Ingley,
    Garry Lancaster, ACX

    All rights reserved

    Redistribution and use in source and synthezised forms, with or without
    modification, are permitted provided that the following conditions are met:

    Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.

    Redistributions in synthesized form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.

    Neither the name of the author nor the names of other contributors may
    be used to endorse or promote products derived from this software without
    specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
    THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.

The original core can be found at:

    http://www.opencores.org/cvsweb.shtml/t80/

The ZX Spectrum Next modifications can be found at:

    https://gitlab.com/SpectrumNext/ZX_Spectrum_Next_FPGA/tree/master/cores