dev: growing this into the Zone OS project
The scope of this project is growing, mostly for fun. I doubt I'll ever get to the point where I can actually use it on a real Z80 system, but who knows. Mostly this is a good way to learn about vasm and refresh my Z80 assembly knowledge.
This commit is contained in:
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346
LICENSE
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346
LICENSE
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@ -0,0 +1,346 @@
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Mozilla Public License Version 2.0
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==================================
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1. Definitions
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--------------
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1.1. "Contributor"
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means each individual or legal entity that creates, contributes to
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the creation of, or owns Covered Software.
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1.2. "Contributor Version"
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means the combination of the Contributions of others (if any) used
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by a Contributor and that particular Contributor's Contribution.
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1.3. "Contribution"
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means Covered Software of a particular Contributor.
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1.4. "Covered Software"
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|
means Source Code Form to which the initial Contributor has attached
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the notice in Exhibit A, the Executable Form of such Source Code
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Form, and Modifications of such Source Code Form, in each case
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including portions thereof.
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1.5. "Incompatible With Secondary Licenses"
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|
means
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(a) that the initial Contributor has attached the notice described
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in Exhibit B to the Covered Software; or
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(b) that the Covered Software was made available under the terms of
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|
version 1.1 or earlier of the License, but not also under the
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terms of a Secondary License.
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1.6. "Executable Form"
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means any form of the work other than Source Code Form.
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|
1.7. "Larger Work"
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|
means a work that combines Covered Software with other material, in
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|
a separate file or files, that is not Covered Software.
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|
1.8. "License"
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|
means this document.
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|
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|
1.9. "Licensable"
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means having the right to grant, to the maximum extent possible,
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|
whether at the time of the initial grant or subsequently, any and
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|
all of the rights conveyed by this License.
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|
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|
1.10. "Modifications"
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|
means any of the following:
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|
(a) any file in Source Code Form that results from an addition to,
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|
deletion from, or modification of the contents of Covered
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|
Software; or
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(b) any new file in Source Code Form that contains any Covered
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|
Software.
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1.11. "Patent Claims" of a Contributor
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|
means any patent claim(s), including without limitation, method,
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process, and apparatus claims, in any patent Licensable by such
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|
Contributor that would be infringed, but for the grant of the
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License, by the making, using, selling, offering for sale, having
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made, import, or transfer of either its Contributions or its
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Contributor Version.
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1.12. "Secondary License"
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|
means either the GNU General Public License, Version 2.0, the GNU
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Lesser General Public License, Version 2.1, the GNU Affero General
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|
Public License, Version 3.0, or any later versions of those
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licenses.
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1.13. "Source Code Form"
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means the form of the work preferred for making modifications.
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1.14. "You" (or "Your")
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means an individual or a legal entity exercising rights under this
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License. For legal entities, "You" includes any entity that
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controls, is controlled by, or is under common control with You. For
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purposes of this definition, "control" means (a) the power, direct
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or indirect, to cause the direction or management of such entity,
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whether by contract or otherwise, or (b) ownership of more than
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fifty percent (50%) of the outstanding shares or beneficial
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ownership of such entity.
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2. License Grants and Conditions
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|
--------------------------------
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2.1. Grants
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|
Each Contributor hereby grants You a world-wide, royalty-free,
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non-exclusive license:
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|
(a) under intellectual property rights (other than patent or
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|
trademark) Licensable by such Contributor to use, reproduce,
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|
make available, modify, display, perform, distribute, and
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|
otherwise exploit its Contributions, either on an unmodified
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|
basis, with Modifications, or as part of a Larger Work; and
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(b) under Patent Claims of such Contributor to make, use, sell,
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offer for sale, have made, import, and otherwise transfer either
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|
its Contributions or its Contributor Version.
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2.2. Effective Date
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The licenses granted in Section 2.1 with respect to any Contribution
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|
become effective for each Contribution on the date the Contributor
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first distributes such Contribution.
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2.3. Limitations on Grant Scope
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The licenses granted in this Section 2 are the only rights granted
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under this License. No additional rights or licenses will be implied
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|
from the distribution or licensing of Covered Software under this
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|
License. Notwithstanding Section 2.1(b) above, no patent license is
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|
granted by a Contributor:
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(a) for any code that a Contributor has removed from Covered
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|
Software; or
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|
(b) for infringements caused by: (i) Your and any other third party's
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modifications of Covered Software, or (ii) the combination of
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its Contributions with other software (except as part of its
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Contributor Version); or
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(c) under Patent Claims infringed by Covered Software in the absence
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of its Contributions.
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This License does not grant any rights in the trademarks, service
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|
marks, or logos of any Contributor (except as may be necessary to
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comply with the notice requirements in Section 3.4).
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2.4. Subsequent Licenses
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|
No Contributor makes additional grants as a result of Your choice to
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|
distribute the Covered Software under a subsequent version of this
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|
License (see Section 10.2) or under the terms of a Secondary License
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|
(if permitted under the terms of Section 3.3).
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2.5. Representation
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|
Each Contributor represents that the Contributor believes its
|
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|
Contributions are its original creation(s) or it has sufficient
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rights to grant the rights to its Contributions conveyed by this
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|
License.
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2.6. Fair Use
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This License is not intended to limit any rights You have under
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applicable copyright doctrines of fair use, fair dealing, or other
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equivalents.
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2.7. Conditions
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|
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses
|
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granted in Section 2.1.
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3. Responsibilities
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|
-------------------
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3.1. Distribution of Source Form
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|
All distribution of Covered Software in Source Code Form, including
|
||||||
|
any Modifications that You create or to which You contribute, must
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|
be under the terms of this License. You must inform recipients that
|
||||||
|
the Source Code Form of the Covered Software is governed by the
|
||||||
|
terms of this License, and how they can obtain a copy of this
|
||||||
|
License. You may not attempt to alter or restrict the recipients'
|
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|
rights in the Source Code Form.
|
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|
3.2. Distribution of Executable Form
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|
If You distribute Covered Software in Executable Form then:
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|
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|
(a) such Covered Software must also be made available in Source Code
|
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|
Form, as described in Section 3.1, and You must inform recipients
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|
of the Executable Form how they can obtain a copy of such Source
|
||||||
|
Code Form by reasonable means in a timely manner, at a charge no
|
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|
more than the cost of distribution to the recipient; and
|
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|
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||||||
|
(b) You may distribute such Executable Form under the terms of this
|
||||||
|
License, or sublicense it under different terms, provided that
|
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|
the license for the Executable Form does not attempt to limit or
|
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|
alter the recipients' rights in the Source Code Form under this
|
||||||
|
License.
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|
3.3. Distribution of a Larger Work
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|
You may create and distribute a Larger Work under terms of Your
|
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|
choice, provided that You also comply with the requirements of this
|
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|
License for the Covered Software. If the Larger Work is a
|
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|
combination of Covered Software with a work governed by one or more
|
||||||
|
Secondary Licenses, and the Covered Software is not Incompatible
|
||||||
|
With Secondary Licenses, this License permits You to additionally
|
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|
distribute such Covered Software under the terms of such Secondary
|
||||||
|
License(s), so that the recipient of the Larger Work may, at their
|
||||||
|
option, further distribute the Covered Software under the terms of
|
||||||
|
either this License or such Secondary License(s).
|
||||||
|
|
||||||
|
3.4. Notices
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|
You may not remove or alter the substance of any license notices
|
||||||
|
(including copyright notices, patent notices, disclaimers of
|
||||||
|
warranty, or limitations of liability) contained within the Source
|
||||||
|
Code Form of the Covered Software, except that You may alter any
|
||||||
|
license notices to the extent required to remedy known factual
|
||||||
|
inaccuracies.
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||||||
|
|
||||||
|
3.5. Application of Additional Terms
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|
You may choose to offer, and to charge a fee for, warranty, support,
|
||||||
|
indemnity or liability obligations to one or more recipients of
|
||||||
|
Covered Software. However, You may do so only on Your own behalf,
|
||||||
|
and not on behalf of any Contributor. You must make it absolutely
|
||||||
|
clear that any such warranty, support, indemnity, or liability
|
||||||
|
obligation is offered by You alone, and You hereby agree to
|
||||||
|
indemnify every Contributor for any liability incurred by such
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||||||
|
Contributor as a result of warranty, support, indemnity, or
|
||||||
|
liability terms You offer.
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||||||
|
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||||||
|
4. Inability to Comply Due to Statute or Regulation
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||||||
|
---------------------------------------------------
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|
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|
If it is impossible for You to comply with any of the terms of this
|
||||||
|
License with respect to some or all of the Covered Software due to
|
||||||
|
statute, judicial order, or regulation then You must: (a) comply
|
||||||
|
with the terms of this License to the maximum extent possible; and
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|
(b) describe the limitations and the code they affect. Such
|
||||||
|
description must be placed in a text file included with all
|
||||||
|
distributions of the Covered Software under this License. Except to
|
||||||
|
the extent prohibited by statute or regulation, such description
|
||||||
|
must be sufficiently detailed for a recipient of ordinary skill to
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|
be able to understand it.
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|
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|
5. Termination
|
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|
--------------
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|
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|
5.1. The rights granted under this License will terminate automatically
|
||||||
|
if You fail to comply with any of its terms. However, if You become
|
||||||
|
compliant, then the rights granted under this License from a
|
||||||
|
particular Contributor are reinstated (a) provisionally, unless and
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|
until such Contributor explicitly and finally terminates Your
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||||||
|
grants, and (b) on an ongoing basis, if such Contributor fails to
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notify You of the non-compliance by some reasonable means prior to
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60 days after You have come back into compliance. Moreover, Your
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grants from a particular Contributor are reinstated on an ongoing
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basis if such Contributor notifies You of the non-compliance by some
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reasonable means, this is the first time You have received notice of
|
||||||
|
non-compliance with this License from such Contributor, and You
|
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become compliant prior to 30 days after Your receipt of the notice.
|
||||||
|
|
||||||
|
5.2. If You initiate litigation against any entity by asserting a patent
|
||||||
|
infringement claim (excluding declaratory judgment actions,
|
||||||
|
counter-claims, and cross-claims) alleging that a Contributor
|
||||||
|
Version directly or indirectly infringes any patent, then the rights
|
||||||
|
granted to You by any and all Contributors for the Covered Software
|
||||||
|
under Section 2.1 of this License shall terminate.
|
||||||
|
|
||||||
|
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
|
||||||
|
end user license agreements (excluding distributors and resellers)
|
||||||
|
which have been validly granted by You or Your distributors under
|
||||||
|
this License prior to termination shall survive termination.
|
||||||
|
|
||||||
|
6. Disclaimer of Warranty
|
||||||
|
-------------------------
|
||||||
|
|
||||||
|
Covered Software is provided under this License on an "as is"
|
||||||
|
basis, without warranty of any kind, either expressed, implied, or
|
||||||
|
statutory, including, without limitation, warranties that the
|
||||||
|
Covered Software is free of defects, merchantable, fit for a
|
||||||
|
particular purpose or non-infringing. The entire risk as to the
|
||||||
|
quality and performance of the Covered Software is with You. Should
|
||||||
|
any Covered Software prove defective in any respect, You (not any
|
||||||
|
Contributor) assume the cost of any necessary servicing, repair, or
|
||||||
|
correction. This disclaimer of warranty constitutes an essential
|
||||||
|
part of this License. No use of any Covered Software is authorized
|
||||||
|
under this License except under this disclaimer.
|
||||||
|
|
||||||
|
7. Limitation of Liability
|
||||||
|
--------------------------
|
||||||
|
|
||||||
|
Under no circumstances and under no legal theory, whether tort
|
||||||
|
(including negligence), contract, or otherwise, shall any
|
||||||
|
Contributor, or anyone who distributes Covered Software as permitted
|
||||||
|
above, be liable to You for any direct, indirect, special,
|
||||||
|
incidental, or consequential damages of any character including,
|
||||||
|
without limitation, damages for lost profits, loss of goodwill, work
|
||||||
|
stoppage, computer failure or malfunction, or any and all other
|
||||||
|
commercial damages or losses, even if such party shall have been
|
||||||
|
informed of the possibility of such damages. This limitation of
|
||||||
|
liability shall not apply to liability for death or personal injury
|
||||||
|
resulting from such party's negligence to the extent applicable
|
||||||
|
law prohibits such limitation. Some jurisdictions do not allow the
|
||||||
|
exclusion or limitation of incidental or consequential damages, so
|
||||||
|
this exclusion and limitation may not apply to You.
|
||||||
|
|
||||||
|
8. Litigation
|
||||||
|
-------------
|
||||||
|
|
||||||
|
Any litigation relating to this License may be brought only in the
|
||||||
|
courts of a jurisdiction where the defendant maintains its principal
|
||||||
|
place of business and such litigation shall be governed by laws of
|
||||||
|
that jurisdiction, without reference to its conflict-of-law
|
||||||
|
provisions. Nothing in this Section shall prevent a party's ability
|
||||||
|
to bring cross-claims or counter-claims.
|
||||||
|
|
||||||
|
9. Miscellaneous
|
||||||
|
----------------
|
||||||
|
|
||||||
|
This License represents the complete agreement concerning the
|
||||||
|
subject matter hereof. If any provision of this License is held to
|
||||||
|
be unenforceable, such provision shall be reformed only to the
|
||||||
|
extent necessary to make it enforceable.
|
||||||
|
Any law or regulation which provides that the language of a contract
|
||||||
|
shall be construed against the drafter shall not be used to construe
|
||||||
|
this License against a Contributor.
|
||||||
|
|
||||||
|
10. Versions of the License
|
||||||
|
---------------------------
|
||||||
|
|
||||||
|
10.1. New Versions
|
||||||
|
Mozilla Foundation is the license steward. Except as provided in
|
||||||
|
Section 10.3, no one other than the license steward has the right
|
||||||
|
to modify or publish new versions of this License. Each version
|
||||||
|
will be given a distinguishing version number.
|
||||||
|
|
||||||
|
10.2. Effect of New Versions
|
||||||
|
You may distribute the Covered Software under the terms of the
|
||||||
|
version of the License under which You originally received the
|
||||||
|
Covered Software, or under the terms of any subsequent version
|
||||||
|
published by the license steward.
|
||||||
|
|
||||||
|
10.3. Modified Versions
|
||||||
|
If you create software governed by this License, you may create a
|
||||||
|
new license version by modifying this License and renaming it. You
|
||||||
|
may distribute your modified version of the License with your
|
||||||
|
software. The modified license may not be called the Mozilla Public
|
||||||
|
License.
|
||||||
|
|
||||||
|
10.4. Distributing Source Code Form That Is Incompatible With Secondary
|
||||||
|
Licenses
|
||||||
|
If You choose to distribute Source Code Form that is Incompatible
|
||||||
|
With Secondary Licenses under the terms of this version of the
|
||||||
|
License, the notice described in Exhibit B of this License must be
|
||||||
|
attached.
|
||||||
|
|
||||||
|
Exhibit A - Source Code Form License Notice
|
||||||
|
-------------------------------------------
|
||||||
|
|
||||||
|
This Source Code Form is subject to the terms of the Mozilla Public
|
||||||
|
License, v. 2.0. If a copy of the MPL was not distributed with this
|
||||||
|
file, You can obtain one at https://mozilla.org/MPL/2.0/.
|
||||||
|
|
||||||
|
Exhibit B - "Incompatible With Secondary Licenses" Notice
|
||||||
|
---------------------------------------------------------
|
||||||
|
|
||||||
|
This Source Code Form is "Incompatible With Secondary Licenses", as
|
||||||
|
defined by the Mozilla Public License, v. 2.0.
|
||||||
13
Makefile
13
Makefile
|
|
@ -1,3 +1,4 @@
|
||||||
|
# SPDX-License-Identifier: MPL-2.0
|
||||||
ASM=vasm_z80_std
|
ASM=vasm_z80_std
|
||||||
LINK=vlink
|
LINK=vlink
|
||||||
|
|
||||||
|
|
@ -12,10 +13,16 @@ float.o: float.asm
|
||||||
printChar.o: printChar.asm
|
printChar.o: printChar.asm
|
||||||
$(ASM) $(ASMFLAGS) -o $@ $<
|
$(ASM) $(ASMFLAGS) -o $@ $<
|
||||||
|
|
||||||
float.hex: float.o printChar.o linker.cmd
|
vectorTable.o: vectorTable.asm
|
||||||
$(LINK) $(LINKFLAGS) -o $@ float.o printChar.o
|
$(ASM) $(ASMFLAGS) -o $@ $<
|
||||||
|
|
||||||
|
zone.o: zone.asm
|
||||||
|
$(ASM) $(ASMFLAGS) -o $@ $<
|
||||||
|
|
||||||
|
float.hex: float.o printChar.o vectorTable.o zone.o linker.cmd
|
||||||
|
$(LINK) $(LINKFLAGS) -o $@ float.o printChar.o vectorTable.o zone.o
|
||||||
|
|
||||||
clean:
|
clean:
|
||||||
rm -f float.o printChar.o float.hex
|
rm -f float.o printChar.o vectorTable.o zone.o float.hex
|
||||||
|
|
||||||
.PHONY: all clean
|
.PHONY: all clean
|
||||||
|
|
|
||||||
|
|
@ -1,3 +1,5 @@
|
||||||
|
; SPDX-License-Identifier: MPL-2.0
|
||||||
|
; SPDX-FileCopyrightText: (c) 2025 A.M. Rowsell
|
||||||
; ============================================================
|
; ============================================================
|
||||||
; Z80 Soft Float Library (4-byte) + Print + Parse (vasm syntax)
|
; Z80 Soft Float Library (4-byte) + Print + Parse (vasm syntax)
|
||||||
; ============================================================
|
; ============================================================
|
||||||
|
|
@ -38,7 +40,7 @@
|
||||||
; ============================================================
|
; ============================================================
|
||||||
; CODE
|
; CODE
|
||||||
; ============================================================
|
; ============================================================
|
||||||
.text
|
.section float
|
||||||
; ------------------------------------------------------------
|
; ------------------------------------------------------------
|
||||||
; External routine you provide:
|
; External routine you provide:
|
||||||
; printChar: prints ASCII character in A
|
; printChar: prints ASCII character in A
|
||||||
|
|
@ -1613,7 +1615,7 @@ DIGLEN: .space 1
|
||||||
; 100000.0 = 143 43 50 00
|
; 100000.0 = 143 43 50 00
|
||||||
; 1000000.0= 146 74 24 00
|
; 1000000.0= 146 74 24 00
|
||||||
; ============================================================
|
; ============================================================
|
||||||
.text
|
.section float
|
||||||
pow10_table:
|
pow10_table:
|
||||||
.byte 127, 0x00, 0x00, 0x00 ; 10^0 = 1
|
.byte 127, 0x00, 0x00, 0x00 ; 10^0 = 1
|
||||||
.byte 130, 0x20, 0x00, 0x00 ; 10^1 = 10
|
.byte 130, 0x20, 0x00, 0x00 ; 10^1 = 10
|
||||||
|
|
|
||||||
10
linker.cmd
10
linker.cmd
|
|
@ -1,6 +1,10 @@
|
||||||
|
# SPDX-License-Identifier: MPL-2.0
|
||||||
SECTIONS
|
SECTIONS
|
||||||
{
|
{
|
||||||
.text 0xE000 : { *(.text) }
|
.zone 0xA000 : { *(.zone) *(zone) }
|
||||||
.data 0x7000 : { *(.data) }
|
.text 0xE000 : { *(.text) }
|
||||||
.bss : { *(.bss) }
|
.float 0xE000 : { *(.float) *(float) }
|
||||||
|
.vectors 0xF000 : { *(.vectors) }
|
||||||
|
.data 0x7000 : { *(.data) }
|
||||||
|
.bss : { *(.bss) }
|
||||||
}
|
}
|
||||||
|
|
|
||||||
|
|
@ -1,3 +1,5 @@
|
||||||
|
; SPDX-License-Identifier: MPL-2.0
|
||||||
|
; SPDX-FileCopyrightText: (c) 2025 A.M. Rowsell
|
||||||
; Stub printChar: does nothing
|
; Stub printChar: does nothing
|
||||||
.global printChar
|
.global printChar
|
||||||
printChar:
|
printChar:
|
||||||
|
|
|
||||||
17
vectorTable.asm
Normal file
17
vectorTable.asm
Normal file
|
|
@ -0,0 +1,17 @@
|
||||||
|
; SPDX-License-Identifier: MPL-2.0
|
||||||
|
; SPDX-FileCopyrightText: (c) 2025 A.M. Rowsell
|
||||||
|
; ============================================================
|
||||||
|
; OS Vector Table (128 x 2-byte addresses) at 0xF000-0xF1FF
|
||||||
|
; ============================================================
|
||||||
|
.equ OS_VEC_BASE,0xF000
|
||||||
|
|
||||||
|
; .vectors is pinned to 0xF000 via linker.cmd
|
||||||
|
.section .vectors
|
||||||
|
.global os_vectors
|
||||||
|
|
||||||
|
os_vectors:
|
||||||
|
.word os_print_vec
|
||||||
|
.word os_getch_vec
|
||||||
|
.word os_outbyte_vec
|
||||||
|
.word os_inbyte_vec
|
||||||
|
.zero 248
|
||||||
26
zone.asm
Normal file
26
zone.asm
Normal file
|
|
@ -0,0 +1,26 @@
|
||||||
|
; SPDX-License-Identifier: MPL-2.0
|
||||||
|
; SPDX-FileCopyrightText: (c) 2025 A.M. Rowsell
|
||||||
|
; ============================================================
|
||||||
|
; ZONE OS main section
|
||||||
|
; ============================================================
|
||||||
|
.section zone
|
||||||
|
.global zone_start
|
||||||
|
.global os_print_vec
|
||||||
|
.global os_getch_vec
|
||||||
|
.global os_outbyte_vec
|
||||||
|
.global os_inbyte_vec
|
||||||
|
|
||||||
|
zone_start:
|
||||||
|
ret
|
||||||
|
|
||||||
|
os_print_vec:
|
||||||
|
ret
|
||||||
|
|
||||||
|
os_getch_vec:
|
||||||
|
ret
|
||||||
|
|
||||||
|
os_outbyte_vec:
|
||||||
|
ret
|
||||||
|
|
||||||
|
os_inbyte_vec:
|
||||||
|
ret
|
||||||
Loading…
Add table
Add a link
Reference in a new issue