From c2b512e803285223959e0a97601c017730d1b0bb Mon Sep 17 00:00:00 2001 From: user Date: Sat, 18 Jul 2026 22:19:59 +0200 Subject: term+libc: batched write rendering - one tile render per write(), 2.3x lines sys_write sets wBatch; render_cursor_tile - the single choke point all of term_putc's visible mutations pass through - then marks a dirty span (per LINE-SLOT, so spans survive scroll rotation for free) instead of rendering. term_write_end renders every dirty tile exactly once, then the cursor. Scrolls stay immediate (blank rebuild is cheap and artifact-free); file-bound writes flush for free. The enabler is in libc: puts() was a SYS_PUTC trap PER CHARACTER, so almost no console output ever went through sys_write. It now issues one SYS_WRITE for the whole string - one trap, one batch, and every line-printer (echo, irc, the shell) gets the batched path. Measured: 37-char write = 128k cycles (3.5k/char) vs ~8k/char down the per-char trap path. Full demo passes; GIF regenerated. --- src/syscall.asm | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'src/syscall.asm') diff --git a/src/syscall.asm b/src/syscall.asm index 4bcb601..cab3e79 100644 --- a/src/syscall.asm +++ b/src/syscall.asm @@ -85,6 +85,8 @@ sys_write: ld a, b or a ret z ; len 0 + ld a, 1 + ld [wBatch], a ; defer terminal rendering for the whole write .loop ld a, [de] push de @@ -96,7 +98,7 @@ sys_write: inc de dec b jr nz, .loop - ret + jp term_write_end ; render each dirty tile once + the cursor ; ----------------------------------------------------------------------------- ; CurStdin / CurStdout -> A = current process PROC_STDIN / PROC_STDOUT -- cgit v1.3.1-sl0p