Apple-2-HW/micro-sci-a2-controller
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Merge pull request '2716' (#1) from 2716 into main

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Reviewed-on: https://codeberg.org/cryu/micro-sci-a2-controller/pulls/1
This commit is contained in:
Christopher Ryu 2023-07-18 06:27:18 +00:00
commit b139c34060
8 changed files with 46180 additions and 5647 deletions
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1
.gitignore vendored
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@ -29,3 +29,4 @@ fp-info-cache
*.xml *.xml
*.csv *.csv
*.lck

43808
MicroSci Floppy Controller.kicad_pcb
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10
MicroSci Floppy Controller.kicad_pro
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@ -55,7 +55,9 @@
"width": 0.0 "width": 0.0
} }
], ],
"drc_exclusions": [], "drc_exclusions": [
"text_height|60650000|69400000|d768dc85-30ba-4ddc-bd02-7ecc813bf984|00000000-0000-0000-0000-000000000000"
],
"meta": { "meta": {
"version": 2 "version": 2
}, },
@ -92,11 +94,11 @@
"pth_inside_courtyard": "ignore", "pth_inside_courtyard": "ignore",
"shorting_items": "error", "shorting_items": "error",
"silk_edge_clearance": "warning", "silk_edge_clearance": "warning",
"silk_over_copper": "warning", "silk_over_copper": "ignore",
"silk_overlap": "warning", "silk_overlap": "ignore",
"skew_out_of_range": "error", "skew_out_of_range": "error",
"solder_mask_bridge": "ignore", "solder_mask_bridge": "ignore",
"starved_thermal": "error", "starved_thermal": "warning",
"text_height": "warning", "text_height": "warning",
"text_thickness": "warning", "text_thickness": "warning",
"through_hole_pad_without_hole": "error", "through_hole_pad_without_hole": "error",

7745
MicroSci Floppy Controller.kicad_sch
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10
README.md
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@ -4,7 +4,15 @@ This is a clone of the Micro-SCI / Franklin floppy drive controller.
v0.1 is a direct clone, reverse-engineered from a Micro-SCI board. It was cross-checked with a Franklin-branded board, as well as the (belatedly discovered) official Franklin schematic (included in doc/service_and_schematics.pdf) v0.1 is a direct clone, reverse-engineered from a Micro-SCI board. It was cross-checked with a Franklin-branded board, as well as the (belatedly discovered) official Franklin schematic (included in doc/service_and_schematics.pdf)
Since it is a faithful clone, it requires a 2708 EPROM (or a different EPROM with a 2708 adaptor). A board slightly revised to use a 2716/2732 is available on the 2716 git branch. v0.2 has the following enhancements over the original design:
* the 2708 EPROM has been replaced with a more-common 2716/2732 EPROM
* decoupling capacitors have been added
* footprints for all capacitors and resistors have been modernized
* firmware EPROM bank selection jumpers replaced with a DIP switch
* obsolete MPS-U51 transistor replaced with modern equivalent
* clearly-maked calibration test points have been added
* ground pours used to increase operational stability
Firmware images can be built via the Makefile in the firmware subdirectory. The build framework requires cc65. Firmware images can be built via the Makefile in the firmware subdirectory. The build framework requires cc65.

252
eprom.kicad_sym Normal file
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@ -0,0 +1,252 @@
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1
sym-lib-table
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@ -2,4 +2,5 @@
(version 7) (version 7)
(lib (name "apple2")(type "KiCad")(uri "${KIPRJMOD}/apple2.kicad_sym")(options "")(descr "")) (lib (name "apple2")(type "KiCad")(uri "${KIPRJMOD}/apple2.kicad_sym")(options "")(descr ""))
(lib (name "TTL")(type "KiCad")(uri "${KIPRJMOD}/TTL.kicad_sym")(options "")(descr "")) (lib (name "TTL")(type "KiCad")(uri "${KIPRJMOD}/TTL.kicad_sym")(options "")(descr ""))
(lib (name "eprom")(type "KiCad")(uri "/home/wileyc/Nextcloud/KiCAD/micro-sci-a2-controller/eprom.kicad_sym")(options "")(descr ""))
) )

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usci.png
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