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| builderpages:plasmo:g8pp:g8ppbase68k8 [2022/01/25 16:09] – Revision from 2022-01-25 | builderpages:plasmo:g8pp:g8ppbase68k8 [2026/06/15 13:07] (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:g8pp:g8ppbase68k8 |
| | Snapshot date: 2026-01-20 |
| | Generator : wayback-archiver |
| | */ |
| | |
| | ====== G8PPBase + 68K8 ====== |
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| | ===== Introduction ===== |
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| | This is a two-board configuration consists of a [[builderpages:plasmo:g8pp:g8ppbase|G8PP in baseline configuration]] and a simple MC68008 board on RC2014 backplane. |
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| | [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=1e660d&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/g8pp/g8pp68k8/g8ppbase68k8.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/g8pp/g8pp68k8/g8ppbase68k8.jpg?600x375|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_g8pp_g8pp68k8_g8ppbase68k8.jpg}}]] |
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| | ===== 68008 CPU Card ===== |
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| | [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:cpu68008_comp.jpg|{{builderpages:plasmo:g8pp:g8pp68k8:cpu68008_comp.jpg?400x184|cpu68008_comp.jpg}}]] |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:cpu68k8_scm.pdf|Schematic]] of PCB 68008 CPU card |
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| | Gerber [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:cpu68k8_r1.zip|photoplots]] of 68008 CPU card |
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| | ==== Prototype 68008 CPU Card ==== |
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| | [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=ee1b4a&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/g8pp/g8pp68k8/68k8_cpu_comp.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/g8pp/g8pp68k8/68k8_cpu_comp.jpg?250x111|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_g8pp_g8pp68k8_68k8_cpu_comp.jpg}}]] |
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| | [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=70299b&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/g8pp/g8pp68k8/68k8_cpu_solder.jpg|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/builderpages/plasmo/g8pp/g8pp68k8/68k8_cpu_solder.jpg?250x113|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_g8pp_g8pp68k8_68k8_cpu_solder.jpg}}]] |
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| | This is a prototype of the 68008 CPU card. It is superseded by the PC board version. |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:68k8_scm.pdf|Schematic]] of prototype 68008 CPU card |
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| | ===== RC2014 Signal Definition ===== |
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| | The following RC2014 signals are redefined for G8PPBase+68K8: |
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| | RC2014 Pin 19 (nM1) — A16 (68008 pin 16) |
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| | RC2014 Pin 23 (nMREQ) — nAS (68008 pin 28) |
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| | RC2014 Pin 24 (nWR) — RnW (68008 pin 30) |
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| | RC2014 Pin 25 (nRD) — A17 (68008 pin 17) |
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| | RC2014 Pin 26 (nIORQ) — A18 (68008 pin 18) |
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| | RC2014 Pin 37 (Spare 1) — nBR (68008 pin 33) |
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| | RC2014 Pin 38 (Spare 2) — nDTACK (68008 pin 31) |
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| | RC2014 Pin 39 (Spare 3) — A19 (68008 pin 19) |
| | |
| | ===== G8PP Baseline Configuration ===== |
| | |
| | Introduction to [[builderpages:plasmo:g8pp|G8PP]] |
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| | G8PP [[builderpages:plasmo:g8pp:g8ppbase|baseline configuration]] |
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| | Altera EPM7128SQC100 [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:g8pp68k8_cpld_1_17_19.zip|design for 68K8]] |
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| | ===== G8PPBase+68K8 ===== |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:g68kload.zip|Serial Bootstrap]], a bare minimum S record loader. It automatically jumps to 0x400 after a successful load. The serial communication is 38400, N81, no parity |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:g68kbug_buggy_1_17_19.zip|68K8 Monitor]] ←still buggy, but good enough for file loading and memory display/mod |
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| | [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:cpm68k_bios_ccp_bdos_write_1_17_19.zip|CP/M-68K]], BIOS/CCP/BDOS for G8PPBase+68K8 |
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| | CP/M68K distribution files |
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| | ===== Manuals and Instructions ===== |
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| | Getting started with G8PPBase+68K8 ←configure altera epm7128, load bootstrap, load z80 monitor, load cp/m |
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| | 68K8 Monitor manual |
| |
