Add zx81sd architecture: ZX81 + SD81 Booster support#1099

Merged

boriel merged 10 commits into

boriel-basic:mainfrom

Jul 26, 2026

Commits on Jul 23, 2026

zx81sd: clear screen and attributes on program start

wilco2009
and
claude
committed
zx81sd: add SD81 Booster double buffer library and bounce demo

wilco2009
and
claude
committed
zx81sd: fix bounce_sd81 bouncing early at y~128 instead of 176

wilco2009
and
claude
committed
zx81sd: RST $38 waits for VSYNC and returns instead of hanging forever

wilco2009
and
claude
committed
zx81sd: close out the exit-to-BASIC investigation

wilco2009
and
claude
committed
zx81sd: fix array.asm corrupting code on multi-dimensional arrays

wilco2009
and
claude
committed
zx81sd: fix chr.asm and arith/divf.asm, same MEMBOT-style pattern

wilco2009
and
claude
committed
zx81sd: fix stray EI corrupting state, add sysvar/port docs and build tools
wilco2009
committed
zx81sd: build_sd81.py --copy-to also copies boot1.bin
wilco2009
committed

Commits on Jul 24, 2026

zx81sd: bank large data tables into block 7, --asm build option

wilco2009
and
claude
committed