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1.2 KiB
1.2 KiB
CERES-16
a shitty fantasy console written in rust using a proprietary MIPS based asm instruction set. a lot of inspiration from PICO-8. ceres is structured of these crates:
- ceres-sys: the core system structure of ceres-16
Graphics
ceres uses a 256x144 screen with a separate video buffer from the standard memory. colors are 16-bit structured like 0b0000_rrrr_gggg_bbbb where the first four bits are ignored. the video buffer is structured row major where each u16 is an individual pixel
Register layout and info
all registers are unsigned 16 bit
| Register number | Register name | Register usage |
|---|---|---|
| 0 | z0 | always contains zero |
| 1 | pc | program counter |
| 2 | sp | stack pointer |
| 3 | ra | return address |
| 4-6 | a0-a2 | argument registers |
| 7 | v0 | return register |
| 8 | v1 | return register 2 |
| 9-15 | t0-t6 | temporary registers |
Memory map and info
god oh fuck what am i even doing