snark13
527d4a6a18
libc/mem/:
• Split bank_io.c into bank_io_w3.c (existing W3 helpers, base 0xC000,
port 0xE2) and bank_io_w1.c (new mirror through W1, base 0x4000,
port 0xA2). Two .rel files so DCE picks only the needed group:
a W3-only user pulls ~70 bytes instead of all 134. W1 variants are
`--memory tiny`-only (any other mode runs code from W1 or uses W1
for the banked-code segment, swapping it crashes).
• mem_alloc.c: add CF=err checks for mem_free_block and mem_get_page
(were silently ignored), per-function docstrings on alloc/free/
get_page/info, drop the confused "wait wrong order" comment in
mem_info. Header sprinter_mem.h gets matching per-function doc.
libc/stdio/:
• Add hex_print.c (hex8/hex16/hex32, ~26 bytes) and dec_print.c
(dec8/dec16/dec32, ~170 bytes) ported from solid-c STDLIB.ASM.
Replaces the printf("%u"/"%X") wrappers in solid_helpers.c that
dragged in the 3-5 KB printf machinery.
- hex* use the classic cp 10 / sbc 0x69 / daa nibble→ASCII trick;
hex8 self-calls for the high nibble, hex16/hex32 tail-call hex8.
- dec32 is the master routine; dec8/dec16 jump into shared entry
points (__dec_entry3 / __dec_entry5). 32-bit subtract-power-of-10
keeps the high 16 bits in HL alt (shadow set).
- DISCOVERY: ESTEX PUTCHAR ($5B) on our Sprinter build preserves
the main register set + IX but CLOBBERS the shadow set
(BC'/DE'/HL'). solid-c's original code assumed otherwise and
garbled output for values ≥ 6 digits. Fix: save/restore HL alt
around the RST 10 in _dec_emit_or_skip. Documented in
memory/estex_putchar_abi.md.
• file.c: drop stdaux/stdprn (no Sprinter printer API), change
stdin/stdout/stderr fd markers to 0/-1/-2 (positive fds clash with
ESTEX OPEN return values), add TODO header pointing at v2 buffered
FILE rewrite (see docs/TODO.md for the Solid-C reference struct).
bin/sprinter-cc:
• --memory big and --memory huge now always use crt0_banked.s (was:
only with --bank flags), matching docs/memory_modes_implemented.md.
When the user has no --bank flags, generate a tiny stub with
`const uint8_t n_banks = 0;` and assemble bank.s for _bank_pages.
Without this fix, openenv with --memory big could not see the
estex_file_handle symbol exported by crt0_banked.
examples/openenv:
• Add usage of estex_file_handle to confirm the crt0_banked startup-
info is reachable. Local extern decl — keeps the symbol out of
sprinter.h since it only exists in big/huge builds.
examples/dec_test:
• New regression test covering hex8/16/32 and dec8/16/32 across the
interesting boundary values.
.gitignore: add .kilo/ (editor session cache).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
226 lines
9.8 KiB
Markdown
226 lines
9.8 KiB
Markdown
# Sprinter C Compiler — v1.0
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C toolchain for **Sprinter** — the Z80-based home computer by Peters Plus, running
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ESTEX DSS. Host: macOS / Linux. Target: `.EXE` files in SprintEXE format.
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Built on top of **SDCC 4.5** (vendored in `third_party/sdcc/`). This repository adds
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everything Sprinter-specific: crt0, linker integration, libc wrappers over ESTEX,
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banked-call trampolines, graphics & accelerator API, mouse driver wrappers, and the
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`mkexe` utility for producing SprintEXE images.
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## What you get
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* **`bin/sprinter-cc`** — one-line driver: `sprinter-cc -o foo.exe foo.c`
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* **Memory modes**: `tiny`, `small`, `big`, `huge`, `manual` — see below.
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* **stdio + conio**: printf, puts, putchar, getchar, fopen/fread/..., cprintf, cputs, putch, textcolor/textbackground/textattr, gotoxy, kbhit/getch.
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* **Graphics**: 320×256×256 and 640×256×16 modes, accelerator-backed primitives (hline / vline / rect / fill_rect / line via Bresenham, plus clear), bitmap-font text in both modes via BIOS character generator.
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* **File I/O**: POSIX (`open`/`read`/`write`/`close`/`lseek`/`unlink`/`creat`), FILE\* streams (`fopen`/`fgets`/`fwrite`/...), directory listing (`ffirst`/`fnext`), `chdir`/`getcwd`/`mkdir`/`rmdir`, `stat`/`fstat`.
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* **Memory**: 32 KB heap (W2-resident), banking-aware page allocator (`mem_alloc_pages`/`bank_read`/`bank_write`), explicit memory modes for sub-16 KB programs.
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* **Mouse**: full Sprinter driver wrapper (14 functions including custom cursor bitmaps).
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* **Environment**: `getenv`/`putenv`/`sysenv` over ESTEX `$46`.
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* **Time**: `getdatetime`/`setdatetime` + POSIX `time`/`localtime`/`mktime`/`asctime`/`ctime`.
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* **Misc**: `errno`/`strerror`/`perror`, `atexit`, `setjmp`/`longjmp`, `sleep`, full argv parsing in crt0.
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## Quick start
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```sh
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git clone <this repo> sprinter-c
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cd sprinter-c
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make sdcc # one-time: fetch SDCC 4.5 binary (~25 MB)
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make all # build mkexe + libsprinter.lib + 27 examples
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make floppy # pack everything into mame/v306/IMG/mc.img
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cd mame/v306 && ./run_mame.sh # boot Sprinter in MAME
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```
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Compile a single program:
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```sh
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cat > hello.c <<EOF
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#include <stdio.h>
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int main(void) { puts("Hello, Sprinter!"); return 0; }
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EOF
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bin/sprinter-cc -o hello.exe hello.c
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```
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That's it — `hello.exe` is now a valid SprintEXE you can `RUN HELLO` from the ESTEX shell.
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## Memory modes
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Sprinter's address space is four 16 KB windows (W0 / W1 / W2 / W3). DSS allocates
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pages by program size — small programs get only one page. Pick a memory mode based
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on what your program needs:
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| Mode | Code lives in | Banking | Use when | Note |
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|---|---|---|---|
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| `tiny` (default) | W2 (0x8100+) | no | code+data < 14 KB | |
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| `small` | W1-W2 (0x4100+) | no | code+data < 30 KB | |
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| `big` | W2 + W1 banking | yes (W1) | tiny + extra code modules | |
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| `huge` | W1-W2 + W3 banking | yes (W3) | small + extra code modules | |
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| `manual` | user-specified | optional | special layouts | Not implemented |
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```sh
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sprinter-cc --memory small -o big.exe bigprog.c
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sprinter-cc --memory huge -o app.exe main.c --bank 1=engine.c --bank 2=ai.c
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```
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Banked functions are declared with `__banked`:
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```c
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void engine_tick(int dt) __banked; // lives in BANK1, automatically swapped
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```
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## Examples (27 total)
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| Example | What it demonstrates |
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|---|---|
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| `hello` | Hello world with stdio + conio Turbo-C-style colors |
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| `argv` | argv parsing in crt0 |
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| `cat` | File I/O — read & print TEST.TXT |
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| `seek` | 32-bit lseek over a 100 KB file |
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| `ls` | Directory listing via ffirst/fnext |
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| `filetest` | FILE\* streams (fopen/fread/...) |
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| `stattest` | `stat`/`fstat` on files and directories |
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| `errno` | errno / strerror / perror |
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| `mem_test` | Page allocator + bank\_read/bank\_write |
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| `malloc` | Heap stress test (200+ allocations) |
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| `banked` | Banked code in W3 (huge mode) |
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| `bankedbg` | Banked code in W1 (big mode) |
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| `banklocl` | Bank-local static data and BSS |
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| `mouse` | Mouse driver in text mode |
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| `gfx_mous` | Mouse with custom bitmap cursor in graphics mode |
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| `gfx_demo` | 320×256×256 lines / rects / accelerator |
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| `gfx_d16` | 640×256×16 same primitives |
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| `gfx_text` | Bitmap-font text on graphics screen |
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| `timedir` | Date/time + directory listing |
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| `ptime` | POSIX time API |
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| `openenv` | open() flags + environment vars |
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| `conio` | conio API smoke test |
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| `attrprob` | Probe Sprinter text attribute byte layout |
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| `strtest` | string.h test (from SDCC's z80.lib) |
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| `stdlib` | stdlib.h test (qsort / rand / strtol / etc.) |
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| `assrtest` | assert() |
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| `rt_test` | Runtime helpers (sleep, setjmp, atexit) |
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## Headers
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Standard:
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* `<stdio.h>` — puts / printf / FILE\* + Sprinter-specific dec/hex helpers
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* `<stdlib.h>` — atoi / atof / malloc / qsort / ... (from SDCC z80.lib)
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* `<string.h>` / `<ctype.h>` / `<math.h>` — from SDCC z80.lib
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* `<unistd.h>` — read / write / close / lseek / unlink
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* `<fcntl.h>` — open / creat + O\_RDONLY / O\_CREAT / ...
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* `<errno.h>` — errno + error names + strerror
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* `<sys/stat.h>` — stat / fstat
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* `<setjmp.h>` / `<assert.h>` — from SDCC
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Sprinter-specific:
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* `<conio.h>` — putch / cputs / cprintf, textcolor / textbackground / textattr, kbhit / getch, clrscr, gotoxy, wherex/y
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* `<gfx.h>` — gfx_init/done, palette, putpixel, hline/vline/rect/fill_rect/line, text — for both 320 and 640 modes (gfx_\*16 variants)
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* `<mouse.h>` — full 14-function driver wrapper + mouse_cursor_t with bitmap support
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* `<dir.h>` — chdir / getcwd / mkdir / rmdir / ffirst / fnext / ffblk
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* `<time.h>` — getdatetime / setdatetime + POSIX time / localtime / etc.
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* `<sprinter.h>` — raw ports, ESTEX/BIOS function numbers, env API
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* `<sprinter_exit.h>` — exit / \_exit / atexit
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* `<sprinter_mem.h>` — mem\_alloc\_pages / mem\_free\_block / bank\_read / bank\_write
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* `<sprinter_compat.h>` — Solid-C compatibility layer (aliases + BOOL/WORD/uint types)
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## Toolchain commands
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```sh
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make all # build mkexe + lib + every example
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make floppy # repack mame/v306/IMG/mc.img with all .exe files
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make check # 17 mkexe unit-tests
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make clean # remove all build artefacts
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make sdcc # one-time: fetch SDCC 4.5 binary
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```
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### sprinter-cc options
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```
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sprinter-cc -o foo.exe foo.c [more.c ...] [options]
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--memory MODE tiny | small | big | huge | manual (default: tiny)
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--memory-manual SPEC explicit placement (CODE=W1|W2,DATA=W1|W2|SAME,BANKED=W1|W3)
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--stack-size N bytes reserved for the stack (default ~1278)
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--crt0=TYPE default | minimal | banked | small
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--bank N=FILE.c compile FILE.c into bank N (repeatable, max 15)
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--debug enable runtime diagnostics (defines DEBUG_RT)
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-I PATH extra include path
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-L 0xADDR / -E / -S override load / entry / stack addresses
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-Wl FLAG pass FLAG to sdldz80
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--mkexe FLAG pass FLAG to mkexe (e.g. --mkexe -p --mkexe 0 for bank padding)
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-v verbose
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```
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## Status
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What works in v1.0:
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* Compile / link / pack to SprintEXE — verified on all 27 examples
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* Four memory modes (tiny / small / big / huge)
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* Graphics (both modes) with accelerator
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* Mouse (text + graphics cursor)
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* File I/O, directories, environment, time
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* All headers listed above
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Deferred to v2.0 (see `docs/TODO.md`):
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* **Turbo-C-style BGI graphics API** — `initgraph` / `setcolor` / `circle` /
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`getimage` / `putimage` / etc. on top of our `gfx_*` primitives
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* Remaining Solid-C compatibility gaps (Phase 2/3) — see `docs/solid_c_compatibility.md`
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* Manual memory mode
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* Rewrite FILE\* stream API (current implementation is very primitive and doesn't use buffers)
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Deferred to v3.0:
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* **IM2 interrupt handlers** — research complete (`docs/im2_isr_design.md`),
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implementation scheduled for v3
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* **Audio API** (AY-3-8910 + COVOX) — requires IM2
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* **ISA-8 slot drivers** — requires IM2 (???)
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## Documentation
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* `docs/TODO.md` — roadmap and open work items
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* `docs/solid_c_compatibility.md` — gap analysis vs Solid-C 2004
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* `docs/im2_isr_design.md` — interrupt handler design (v2)
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* `docs/converted/` — source documentation (ESTEX, BIOS, architecture)
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converted to plain text for `grep`
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* `docs/reference/`, `docs/samples/`, `docs/memory management/` — original
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Russian docs and code samples from Peters Plus
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## Repository layout
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```
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bin/sprinter-cc one-line compiler driver (bash)
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toolchain/mkexe/ host-side tool: .ihx -> .exe SprintEXE
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toolchain/check_banks.py post-link bank size enforcer
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runtime/ crt0 variants (default, minimal, small, banked)
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bank trampolines, heap, heap_top
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libc/include/ headers
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libc/io|stdio|mem|gfx/ C and asm sources for libsprinter.lib
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lib/ Makefile that archives libsprinter.lib via sdar
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examples/ 27 example programs
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mame/v306/ MAME binary + Sprinter ROM/HDD images + floppy script
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third_party/sdcc/ vendored SDCC 4.5 (fetched via `make sdcc`)
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third_party/solid-c/ reference: original Sprinter native C (for compat target)
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docs/ documentation
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```
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## License
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This repository contains:
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* Original code in `bin/`, `toolchain/`, `runtime/`, `libc/`, `lib/`, `examples/` —
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MIT-licensed.
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* `third_party/sdcc/` — SDCC 4.5 under GPLv2 with linking exception
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(see `third_party/sdcc/COPYING.txt`)
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* `third_party/solid-c/` — original Sprinter Solid C, used only as a reference
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## Credits
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* **Sprinter / Peters Plus** — Иван Мак, Дмитрий Паринов and the original team
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* **SDCC** — for the underlying Z80 compiler
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* **z88dk +pps** — Дмитрий M. for paving the way with the first Sprinter target
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* **MAME** — for the Sprinter Sp2000 emulation
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---
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For questions / patches: see CONTRIBUTING.md (TBD) or open an issue.
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