Expose (part of?) 6502 address and data bus on blue pill GPIO pins for memory-mapped devices or SRAM expansion

satoshinm / pill_6502

emulated 8-bit 6502 CPU and 6850 ACIA for STM32F103 blue pill ⛺

GNU General Public License v3.0

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Expose (part of?) 6502 address and data bus on blue pill GPIO pins for memory-mapped devices or SRAM expansion #2

Open satoshinm opened 6 years ago

satoshinm commented 6 years ago

Currently 16KB RAM and 16KB ROM is hardcoded, along with the emulated ACIA chip, but consider bringing out the address/data bus for physical hardware expansion. If pins are scarce, at least part of the bus (configurable?) since much of it is internally emulated.

Pinouts of the STM32F103 blue pill and MOS Technology 6502:

6502 vs blue pill pinout