39 lines
2.1 KiB
Markdown
39 lines
2.1 KiB
Markdown
---
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layout: post
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title: Tidying The Project
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date: 2016-02-06 10:00:00
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permalink: /blog/2016/02/06/
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---
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The next release of PCjs (v1.20.8) is another fairly minor update. It includes basic parallel port emulation, in the
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form of a **ParallelPort** component that you include in a machine XML file with the <parallel> element, in much
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the same way you include the **SerialPort** component with the <serial> element.
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I've also tidied a few things in the [Devices](/devices/) folder. ROM images used to be stored under
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`/devices/pc/basic/` and `/devices/pc/bios/`, but BASIC and BIOS ROM images aren't actually devices; they are the
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*contents* of ROM devices. So, with that in mind, I've made the following rearrangements:
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* `/devices/pc/basic/ibm-basic-1.00.json` => `/devices/pc/rom/5150/basic/BASIC100.json`
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* `/devices/pc/basic/ibm-basic-1.10.json` => `/devices/pc/rom/5160/basic/BASIC110.json`
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* `/devices/pc/bios/5150/*` => `/devices/pc/rom/5150/bios/*`
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* `/devices/pc/bios/5160/*` => `/devices/pc/rom/5160/bios/*`
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* `/devices/pc/bios/5170/*` => `/devices/pc/rom/5170/bios/*`
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* `/devices/pc/bios/compaq/*` => `/devices/pc/rom/compaq/bios/*`
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This structure mirrors what was done with **Machine** and **Video** devices, where the devices are organized
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first by manufacturer (IBM or COMPAQ) and then by type (MDA, CGA, EGA, etc).
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Here, the first **ROM** subdivision is either a manufacturer or a machine model. A model implies a manufacturer;
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for example, models 5150 through 5170 refer to IBM PC models.
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---
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The IBM BASIC ROMs require a bit more research. I'm unclear on the exact history of those ROMs, how many variations
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there were, or whether any of them were machine-dependent.
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The project currently includes only two BASIC ROM versions, 1.00 and 1.10, which were initially released with the
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first model 5150 and 5160 machines, respectively. However, I've also read reports that later revisions of the model
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5150 included BASIC ROM 1.10.
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I believe there was also a version 1.20 released for IBM PCjr, but since PCjs does not yet emulate the PCjr, it has
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not been added to the project.
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