Difference between revisions of "Z80-MBC2 Build Notes"
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* Purchased alternate SRAM | * Purchased alternate SRAM | ||
** [https://www.mouser.com/ProductDetail/913-AS6C1008-55PIN AS6C1008-55PIN] | ** [https://www.mouser.com/ProductDetail/913-AS6C1008-55PIN AS6C1008-55PIN] | ||
− | * Forgot to buy SIP resistors | + | * Forgot to buy SIP resistors |
+ | ** Made my own | ||
+ | ** Pin 1 (boxed on SS is common | ||
+ | ** Used 1/8W resistors vertical | ||
* Ref des are not top-bottom or left-right | * Ref des are not top-bottom or left-right | ||
** PDF Assembly drawing text is not searchable | ** PDF Assembly drawing text is not searchable |
Revision as of 15:55, 23 July 2021
- ebay - bare PCB $8
- Arrived in a couple of days
Reference Docs
- An Easy to Build Real Homemade Computer: Z80-MBC2! - Instructable was helpful
- Hackaday project with files
Build Notes
- Build took less than 2 hours
- Used mostly junk box parts
- Purchased alternate SRAM
- Forgot to buy SIP resistors
- Made my own
- Pin 1 (boxed on SS is common
- Used 1/8W resistors vertical
- Ref des are not top-bottom or left-right
- PDF Assembly drawing text is not searchable
- Struggled to find some of the resistors
- KiCad Gerbers
- 5mm LEDs fit into 3mm hole spacing
- I didn't have a 3mm Blue so I used 5mm
Programming THE ATMEGA32
- Was able to use ATProgHead running Arduino as ISP to burn bootloader but not program the code
- Could not use any of my FTDI cards for serial programming since they have RTS/CTS but not DTR
- Most programmer setups in Arduino work just fine with RTS since both are usually pulled, but not the MightyCore
- This is speculation as to why but I am able to program SCREWDUINO cards just fine
- Used TL866ii to program ATMEGA32 fuses
- Reference: Setting AVR Fuse Bits
- If you use the programmer defaults it sets the clock to 1 MHz which gives a serial port rate of 600 baud (told me I needed to fix the fuses).
Other
- Serial port marking correlated to the FTDI card end not referenced from card internal