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--- builderpages:rhkoolstar:mc-2g-1024 [2021/12/25 03:31] – Revision from 2021-12-25
+++ builderpages:rhkoolstar:mc-2g-1024 [2026/06/15 13:19] (current) – external edit 127.0.0.1
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+/* Imported from Wayback Machine
+   Original URL : https://retrobrewcomputers.org/doku.php?id=builderpages:rhkoolstar:mc-2g-1024
+   Snapshot date: 2025-11-17
+   Generator    : wayback-archiver
+*/
+||
+Here is all you need to build this project.
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:rhkoolstar:mc-2g-1024.zip|MC-2G-1024.zip]] This is the latest version, containing 6 CP/M variants as well as Grant's NASCOM “ROM” Basic. Also included are 10 extra volumes with popular applications. See the .txt file for an index. [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:rhkoolstar:system18.txt|system18.txt]]
+.
+This package is an extension on the FPGA multicomputer, as introduced by Grant Searle, which can be found here: <http://searle.hostei.com/grant/Multicomp/index.html>. It focuses on the Z80 CP/M computer described therein.
+The system's main specifications are:
+New ROM monitor with multi-boot capability, Format, Getsys and Putsys tools and debug capabilities. No BASIC in ROM.
+SD-HC capable card controller. Init at 250 kHz, running at 25 MHz.
+Improved keyboard definition featuring external keymap and added key functionality.
+Multi volume disk system, which currently supports upto 253 8MB disk volumes (which uses 2GB+ on the SD-card). All these volumes can be loaded with a separate OS bootimage.
+OSes configured with 3 drives: A:, B: and C:. A: for the system drive (holding the volume booted from) while B: and C: can be assigned and re-assigned one of the remaining volumes. Also a RAM disk is available for CP/M 2 and CP/M 3 systems.
+Y2k compatible system clock (date and time) for all OSes.
+Included are CP/M 2.2, Dos+ 2.5, CP/M 3.0, MPMII 2.1, ZSDOS 1.1/ZCPR2, ZPM3/ZCCP and NASCOM ROM Basic
+It runs on the EP2C5T144C8N Cyclone II FPGA and the configuration assumes it to be wired up as indicated on Grant's page. You should have wired up 2 serial terminals, an SD-card and at least 512k Memory.\\
+James Moxhams Cyclone2 boards will work without modifications.\\
+extra serial terminals can be wired to the touch screen connector, using RS-232 or USB converters.\\
+You can also use a monochrome (RCA) terminal and 2 serial interfaces. In this case all unused signals need to be commented out. Examples of these configurations are included.\\
+\\
+This package contains VHDL updates for
+ROM monitor; (new concept)
+SD-card controller; (with added SD-HC capability)
+Serial terminals with programmable baudrates (simplified version introduced by Max Scane)
+MMU; (simplified version from the one introduced by James Moxham)
+Microcomputer .vdh file. (ROM-switch, timer interrupt, SD-clock)
+SCBTextDisplayRGB.vhd, to include an external keymap and key updates.
+These are available as source files, with additionally, the .pof file for the default configuration.
+The package includes all binaries, source files, manuals and instructions for building and running the various operating systems, including tools for the additional features (disk mounting system reset etc.) Pre-configured images are included for system disks and Cyclone programming.\\
+The OS specific transient commands are included as binary only. An Open Document Spreadsheet is provided to build custom keymaps.