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--- builderpages:muellerk:start [2021/09/23 07:51] – Revision from 2021-09-23
+++ builderpages:muellerk:start [2026/06/15 13:03] (current) – external edit 127.0.0.1
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 /* Imported from Wayback Machine
    Original URL : https://www.retrobrewcomputers.org/doku.php?id=builderpages:muellerk:start
-   Snapshot date: 2021-09-23
+   Snapshot date: 2026-01-15
    Generator    : wayback-archiver
 */
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 ===== Builder's Notes/Comments =====
-For programming the RSX I used the package from Miguel I. Garcia Lopez as a example/guideline for building my own RSX and C-function files. You can find his original software on [[https://github.com/MiguelVis/RetroProjects|Github]] The Multicomp VHDL-Code incl. the CP/M software I've got from [[builderpages:rhkoolstar:start|here]] in the forum. The PCB and the Mini-FPGA-Board can be found [[boards:sbc:multicomp:cycloneiv-b:start|here]] in the forum wiki. One comment regarding the Mini-FPGA-Board: The Multicomp version using the Cyclone-2 chip can't be used with the graphic, because of not having sufficient internal block-RAM (mainly) and LE's.
+For programming the RSX I used the package from Miguel I. Garcia Lopez as a example/guideline for building my own RSX and C-function files. You can find his original software on [[https://github.com/MiguelVis/RetroProjects|Github]] The Multicomp VHDL-Code incl. the CP/M software I've got from [[builderpages:rhkoolstar:start|here]] in the forum. The PCB and the Mini-FPGA-Board can be found [[boards:sbc:multicomp:cycloneiv-b:start|here]] in the forum wiki. One comment regarding the Mini-FPGA-Board: The Multicomp version using the Cyclone-2 chip can't be used with the graphic, because of not having sufficient internal block-RAM (mainly) and LE's. The green EP4CE&-Board is still offered on [[https://www.ebay.de/itm/272912964704?hash=item3f8ae15c60:g:z-IAAOSwK~da60-o|ebay]].
 The package has reached it's planned basic functionality now. The Reference-Manual, describing the C-functions and the RSX is done.
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 /07/10 11:41
+===== New PCB for BLUE/GREEN EP4CE6 FPGA-Board =====
+Here I present (after some time {{[[lib:images:smileys:icon_wink.gif|]] ) a reworked version of the Multicomp-PCB for the GREEN FPGA-Board. The footprint for the Blue-Board ist replaced and fits now to the one of the Green board. Along with that some additional upgrades where incorporated:
+* +5V DC supply for the PS/2-Keyboard\\
+* a voltage supervisor IC (MAX705) for a controlled reset whileg\\
+powering up/down behaviour\\
+* a RESET-button right-hand side of Serial-B\\
+* two +12V-DC input jacks. This enables the use of one 12V wallmount\\
+power-supply for the Multicomp and my 8“ VGA-Monitor\\
+* a i2c-RTC to have a real clock on board\\
+* a ic2-connector to connect extra hardware via i2c-bus
+For the addition of the RTC and the i2c-connector I've dropped Serial-C to free up some space. This will reduce the usability for MPM somewhat, but who really needs 3 serial lines ? {{[[lib:images:smileys:icon_smile.gif|:-)}}]] For a brief impression of the Blue/Green-Multicomp, view the photos in the Gallery below.
+Filename
+Filesize
+Last modified
+[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:muellerk:multicomp-cycloneiv-apr2021_pcb_blue.zip|multicomp-cycloneiv-apr2021_pcb_blue.zip]]
+.3 MiB
+/04/23 10:44
+[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:muellerk:multicomp-cycloneiv-apr2021_pcb_green.zip|multicomp-cycloneiv-apr2021_pcb_green.zip]]
+.4 MiB
+/04/23 08:41
 ===== Photo Gallery =====
@@ Line 80: / Line 113: @@
 [[builderpages:muellerk:start|{{builderpages:muellerk:photos8_xdemo8.jpg?120x40|photos8_xdemo8.jpg}}]]
+\\
+[[builderpages:muellerk:start|{{builderpages:muellerk:photos1_multicomp-apr2021_green.jpg?120x102|photos1_multicomp-apr2021_green.jpg}}]]
+[[builderpages:muellerk:start|{{builderpages:muellerk:photos2_multicomp-apr2021_blue.jpg?120x90|photos2_multicomp-apr2021_blue.jpg}}]]
 \\