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| builderpages:plasmo:zrc512:zrc512home [2025/06/14 16:45] – Revision from 2025-06-14 | builderpages:plasmo:zrc512:zrc512home [2026/06/15 13:17] (current) – external edit 127.0.0.1 |
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| | /* Imported from Wayback Machine |
| | Original URL : https://retrobrewcomputers.org/doku.php?id=builderpages:plasmo:zrc512:zrc512home |
| | Snapshot date: 2024-11-06 |
| | Generator : wayback-archiver |
| | */ |
| | |
| | ====== ZRC512, A Hobbyist-friendly Z80 SBC for ROM-less RomWBW ====== |
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| | ===== Introduction ===== |
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| | ZRC512 is a faster and hobbyist-friendly variant of ZRC. It is designed specifically for ROM-less RomWBW. Description of ZRC512 online [[https://groups.google.com/g/retro-comp/c/bILDMVI97vo|here]]. |
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| | [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=e3afcf&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/zrc512/zrc512_rev0_pcb.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/zrc512/zrc512_rev0_pcb.jpg?600x224|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_zrc512_zrc512_rev0_pcb.jpg}}]] |
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| | ===== Features ===== |
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| | Z80 at 22MHz |
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| | 512K RAM in 16 banks of 32K |
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| | Compact flash interface |
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| | Altera EPM7128S CPLD |
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| | 64-byte bootstrap ROM |
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| | Serial port |
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| | Decode for RAM, CF, and peripherals |
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| | I2C interface |
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| | DS1302 RTC interface |
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| | WS2812B interface |
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| | RC2014 bus interface |
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| | 5V at 250mA, typical |
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| | 2“x4” 4-layer pc board |
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| | [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=1d53c7&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/zrc512/zrc512_rev0_annotated.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/zrc512/zrc512_rev0_annotated.jpg?500x301|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_zrc512_zrc512_rev0_annotated.jpg}}]] |
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| | ===== Theory of Operation ===== |
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| | Place holder |
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| | ===== Design Information ===== |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zrc512:zrc512_rev0_scm.pdf|Schematic]] |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zrc512:zrc512_rev0_gerber.zip|Gerber photoplots]] |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zrc512:zrc512_rev0_bom.pdf|Bill of Materials]] |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zrc512:zrc512_rev0_pcb_cpld_released.zip|CPLD design]] |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zrc:rev1_1pcb_cpldcf.zip|ROMCPLD]], 64-byte bootstrap ROM resides in CPLD |
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| | ==== Software ==== |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zrc512:zrc512mon_rev0_3.zip|ZRC512 Monitor]], rev0.3 |
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| | ROM-less RomWBW for ZRC512 |
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| | CF [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zrc512:zrc512_romwbw_hd1k_zrc512_combo.zip|disk image]] of ZRC512 monitor and RomWBW. Unzip this file and use Win32DiskImagers to copy the image to 64meg or larger CF disk |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zrc512:zrc512_addition_to_romwbw_source.zip|ZRC512 addition]] to RomWBW source. Future update of RomWBW should include these files. This zip file includes a command file “BuildZRC512.cmd” and a directory “ZRC512” that go into RomWBW\Source directory. |
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| | [[builderpages:plasmo:zrc512:driving_ws2812|Driving WS2812 NeoPixel LED]]. The linked page describe the operation for bit-bang WS2812 LED. A demo program included. |
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| | Disk [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zrc512:cf_image_romwbw_zrc512_working_vgarc.zip|image of ZRC512 + VGARC]] to support standalone computer with monochrome text VGA display and PS2 keyboard. |
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| | ==== Manuals ==== |
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| | ==== Online discussions ==== |
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| | Discussion about ZRC512 on [[https://groups.google.com/g/retro-comp/c/bILDMVI97vo|Google forum]]. There were informative discussions about different flavors of WS2812D starting from Dec 19 2023. |
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