/* Imported from Wayback Machine
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   Snapshot date: 2026-01-20
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*/

==== Table of Contents ====

[[#g8ppbase_68k8|G8PPBase + 68K8]]

[[#introduction|Introduction]]

[[#cpu_card|68008 CPU Card]]

[[#prototype_68008_cpu_card|Prototype 68008 CPU Card]]

[[#rc2014_signal_definition|RC2014 Signal Definition]]

[[#g8pp_baseline_configuration|G8PP Baseline Configuration]]

[[#g8ppbase_68k81|G8PPBase+68K8]]

[[#manuals_and_instructions|Manuals and Instructions]]

====== G8PPBase + 68K8 ======

===== Introduction =====

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.

[[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://retrobrewcomputers.org/lib/exe/fetch.php?w=600&h=375&tok=23b9bd&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fg8pp%2Fg8pp68k8%2Fg8ppbase68k8.jpg?600x375|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_g8pp_g8pp68k8_g8ppbase68k8.jpg}}]]

===== 68008 CPU Card =====

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:cpu68008_comp.jpg|{{https://retrobrewcomputers.org/lib/exe/fetch.php?w=400&h=184&tok=714235&media=builderpages:plasmo:g8pp:g8pp68k8:cpu68008_comp.jpg?400x184|cpu68008_comp.jpg}}]]

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:cpu68k8_scm.pdf|Schematic]] of PCB 68008 CPU card

Gerber [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:cpu68k8_r1.zip|photoplots]] of 68008 CPU card

==== Prototype 68008 CPU Card ====

[[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://retrobrewcomputers.org/lib/exe/fetch.php?w=250&h=111&tok=9cc45c&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fg8pp%2Fg8pp68k8%2F68k8_cpu_comp.jpg?250x111|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_g8pp_g8pp68k8_68k8_cpu_comp.jpg}}]]

[[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://retrobrewcomputers.org/lib/exe/fetch.php?w=250&h=113&tok=c38b64&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fg8pp%2Fg8pp68k8%2F68k8_cpu_solder.jpg?250x113|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_g8pp_g8pp68k8_68k8_cpu_solder.jpg}}]]

This is a prototype of the 68008 CPU card. It is superseded by the PC board version.

[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:68k8_scm.pdf|Schematic]] of prototype 68008 CPU card

===== RC2014 Signal Definition =====

The following RC2014 signals are redefined for G8PPBase+68K8:

RC2014 Pin 19 (nM1) — A16 (68008 pin 16)

RC2014 Pin 23 (nMREQ) — nAS (68008 pin 28)

RC2014 Pin 24 (nWR) — RnW (68008 pin 30)

RC2014 Pin 25 (nRD) — A17 (68008 pin 17)

RC2014 Pin 26 (nIORQ) — A18 (68008 pin 18)

RC2014 Pin 37 (Spare 1) — nBR (68008 pin 33)

RC2014 Pin 38 (Spare 2) — nDTACK (68008 pin 31)

RC2014 Pin 39 (Spare 3) — A19 (68008 pin 19)

===== G8PP Baseline Configuration =====

Introduction to [[builderpages:plasmo:g8pp|G8PP]]

G8PP [[builderpages:plasmo:g8pp:g8ppbase|baseline configuration]]

Altera EPM7128SQC100 [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:g8pp:g8pp68k8:g8pp68k8_cpld_1_17_19.zip|design for 68K8]]

===== G8PPBase+68K8 =====

[[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

[[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

[[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

CP/M68K distribution files

===== Manuals and Instructions =====

Getting started with G8PPBase+68K8 ←configure altera epm7128, load bootstrap, load z80 monitor, load cp/m

68K8 Monitor manual