Geoffrey Swales
UNITED KINGDOM • + Follow
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Description
MINIMAL 6502 SINGLE BOARD COMPUTER: CRAB APPLE I
A simple 6502 based computer which is compatible with the Apple 1 computer from the 1970s.
It uses a PIC18F to act as a serial UART. This also enables a menu to adjust BAUD rate and CPU clock speed (1,2,4MHz).
The system has 32k of SRAM and uses an 8K EEPROM for the OS.
More information can be found on GITHUB.
Also, here's a short video of the serial configuration.
Enjoy!
Geoffrey.
Code
Crab Apple BIOS PIC18F HEX file
CRAB_APPLE_BIOS.X.production.hex
BIOS Sourse
SBC_BIOS.zip
Schematic and Layout
Crab Apple I Schematic
CRAB_APPLE_I.pdf
Jan 17,2023
3,395 views
MINIMAL 6502 SINGLE BOARD COMPUTER: CRAB APPLE I
2 Layers PCB 69.8 x 74.3 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen
A VERY SIMPLE 6502 BASED SINGLE BOARD COMPUTER BASED ON THE APPLE I
USES A PIC18F AS SERIAL CONNECTION TO PC TERMINAL.
3395
8
2
Published: Jan 17,2023
Standard PCB
Download Gerber file 34
BOM(Bill of materials)
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Under the
Attribution-NonCommercial-ShareAlike (CC BY-NC-SA)
License.
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