fix(chipbus): Galaksija display renders legible text (ASCII font8x8)
Galaksija stores ASCII codes in its 0x2800 video RAM (verified by snooping the boot: it writes "@'READY" + ">_" prompt). The original CHRGEN ROM uses a hardware-specific addressing that does not map char-code*8 to a glyph, so rendering through it produced garbled output. Render the ASCII codes with the public-domain IBM/VGA 8x8 font (font8x8 by Daniel Hepper / Marcel Sondaar) instead -- legible green-on-black phosphor text. The boot screen now reads "@'READY" with the ">_" input prompt, exactly like a real Galaksija. Tests updated to check the bright-green channel. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
David Montero Crespo
parent
e3d21cd6fc
commit
a3562ba93f
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@ -77,9 +77,9 @@ describe.skipIf(!have)('chipbus Phase 3 — full Galaksija computer renders READ
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expect(fb, 'display produced a framebuffer').not.toBeNull();
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// "READY" lives at video offset 2 (0x2802) -> row 0, cols 2..6. Count lit
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// pixels across those five character cells (x 16..55, y 0..7).
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// pixels (bright-green G channel) across those five character cells.
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let litReady = 0;
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for (let y = 0; y < 8; y++) for (let x = 16; x < 56; x++) if (fb![(y * 256 + x) * 4] === 0xff) litReady++;
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for (let y = 0; y < 8; y++) for (let x = 16; x < 56; x++) if (fb![(y * 256 + x) * 4 + 1] > 0x80) litReady++;
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expect(litReady, 'the READY prompt is rendered on screen').toBeGreaterThan(20);
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z80.dispose(); rom.dispose(); ram.dispose(); inv.dispose(); disp.dispose();
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@ -51,18 +51,15 @@ describe.skipIf(!have)('chipbus Phase 3 — Galaksija display renders a characte
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pm.triggerPinChange(WR, true); // rising edge -> latch + render
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expect(fb, 'framebuffer produced').not.toBeNull();
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// Cell (col 2, row 0) spans x 16..23, y 0..7. Count lit (white) pixels there.
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let lit = 0;
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for (let y = 0; y < 8; y++) {
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for (let x = 16; x < 24; x++) {
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const o = (y * 256 + x) * 4;
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if (fb![o] === 0xff) lit++;
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}
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}
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expect(lit, 'the R glyph lit some pixels in its cell').toBeGreaterThan(3);
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// A lit pixel is bright green (G channel high); background is dark green.
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const lit = (x: number, y: number) => fb![(y * 256 + x) * 4 + 1] > 0x80;
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// Cell (col 2, row 0) spans x 16..23, y 0..7. Count lit pixels there.
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let litCount = 0;
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for (let y = 0; y < 8; y++) for (let x = 16; x < 24; x++) if (lit(x, y)) litCount++;
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expect(litCount, 'the R glyph lit some pixels in its cell').toBeGreaterThan(3);
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// A blank cell elsewhere (col 0) stays dark.
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let litBlank = 0;
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for (let y = 0; y < 8; y++) for (let x = 0; x < 8; x++) if (fb![(y * 256 + x) * 4] === 0xff) litBlank++;
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for (let y = 0; y < 8; y++) for (let x = 0; x < 8; x++) if (lit(x, y)) litBlank++;
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expect(litBlank, 'an unwritten cell stays blank').toBe(0);
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disp.dispose();
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Binary file not shown.
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@ -1,202 +1,102 @@
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/*
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* galaksija-display <EFBFBD> Galaksija (1983) 32x16 text video, rendered from its
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* memory-mapped video RAM. Phase 3 of the multi-chip bus track
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* (project/multichip-bus/). Public-domain character generator (CHRGEN) by the
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* Galaksija project. The chip is a passive BUS SNOOP: it watches WR + the
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* address + data bus and, on a write into the 0x2800-0x2BFF video region,
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* stores the character and renders that cell into its framebuffer using CHRGEN.
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* It never drives the bus. The framebuffer (256x128 = 32x16 chars of 8x8) is
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* blitted to the chip canvas by the host (vx_framebuffer_init / vx_buffer_write).
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* galaksija-display - Galaksija (1983) 32x16 text video rendered from its
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* memory-mapped video RAM (Phase 3, project/multichip-bus/). Passive BUS SNOOP:
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* watches WR + address + data; on a write into 0x2800-0x2BFF it renders the
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* character into a 256x128 framebuffer. Never drives the bus.
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*
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* CHRGEN: 256 chars x 8 rows, 1 byte per row, bit = 0 -> lit pixel (inverted).
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* Galaksija stores ASCII codes in video RAM (the monitor writes READY as
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* 0x52,0x45,...). Rendered with the public-domain IBM/VGA 8x8 font (font8x8 by
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* Daniel Hepper / Marcel Sondaar) for legible text. font8x8: 1 byte/row, bit 0
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* (LSB) = leftmost pixel, 1 = lit. Green-on-black phosphor look.
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*/
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#include "velxio-chip.h"
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#include <stdint.h>
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#include <stdbool.h>
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#define COLS 32
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#define ROWS 16
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#define CW 8
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#define CH 8
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#define FB_W (COLS*CW)
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#define FB_H (ROWS*CH)
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static const uint8_t chrgen[2048] = {
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xaf,0xbf,0xaf,0xaf,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xdf,0xdf,0xdf,0xdf,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0x03,0xcf,0x83,0x87,0x83,0x03,0x03,0x87,0x7b,0xc7,0x03,0x7b,0xfb,0x7b,0x7b,0x87,
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0x83,0x87,0x83,0x87,0x03,0x7b,0x7b,0x7b,0x7b,0x7b,0x03,0x87,0x87,0x03,0x87,0xff,
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0xff,0xef,0xd7,0xb7,0xdf,0xff,0xe7,0xf8,0xdf,0xef,0xff,0xff,0xff,0xff,0xff,0xbf,
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0x87,0xdf,0x87,0x87,0xbf,0x03,0x87,0x03,0x87,0x87,0xff,0xff,0xff,0xff,0xff,0x87,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,0xff,0xf1,0x1f,0x11,
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0xfb,0xb7,0x77,0x7b,0x77,0xfb,0xfb,0x7b,0x7b,0xef,0x7f,0xbb,0xfb,0x33,0x7b,0x7b,
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0x7b,0x7b,0x7b,0x7b,0xef,0x7b,0x7b,0x7b,0x7b,0x7b,0x7f,0x7b,0x7b,0x7f,0x7b,0xff,
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0xff,0xef,0xd7,0xb7,0x07,0x73,0xdb,0xfb,0xef,0xdf,0xef,0xef,0xff,0xff,0xff,0xbf,
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0x7b,0xcf,0x7b,0x7b,0x9f,0xfb,0x7b,0x7b,0x7b,0x7b,0xe7,0xe7,0xbf,0xff,0xf7,0x7b,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xbb,0x7b,0x77,0xfb,0x77,0xfb,0xfb,0xfb,0x7b,0xef,0x7f,0xdb,0xfb,0x33,0x7b,0x7b,
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0x7b,0x7b,0x7b,0xfb,0xef,0x7b,0x7b,0x7b,0x7b,0x7b,0xbf,0xfb,0xfb,0xbf,0xfb,0xff,
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0xff,0xef,0xd7,0xb7,0xdb,0x73,0xdb,0xfb,0xf7,0xbf,0xab,0xef,0xff,0xff,0xff,0xdf,
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0x7b,0xdf,0x7f,0x7f,0xaf,0xfb,0xfb,0x7f,0x7b,0x7b,0xe7,0xe7,0xdf,0xff,0xef,0x7b,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xfb,0x7b,0x77,0xfb,0x77,0xfb,0xfb,0xfb,0x7b,0xef,0x7f,0xeb,0xfb,0x4b,0x7b,0x7b,
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0x7b,0x7b,0x7b,0xfb,0xef,0x7b,0xb7,0x7b,0xb7,0x7b,0xdf,0xfb,0xfb,0xdf,0xfb,0xff,
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0xff,0xef,0xff,0x03,0xdb,0xbf,0xeb,0xfb,0xf7,0xbf,0xc7,0xef,0xff,0xff,0xff,0xdf,
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0x3b,0xdf,0x7f,0x7f,0xb7,0x83,0x83,0xbf,0x7b,0x7b,0xff,0xff,0xef,0x03,0xdf,0x7f,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xeb,0x7b,0x87,0xfb,0x77,0x83,0x83,0x1b,0x03,0xef,0x7f,0xf3,0xfb,0x4b,0x73,0x7b,
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0x83,0x7b,0x83,0x87,0xef,0x7b,0xb7,0x7b,0xcf,0x07,0xef,0xfb,0xfb,0xef,0x87,0xff,
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0xff,0xef,0xff,0xb7,0x87,0xdf,0xf7,0xfb,0xf7,0xbf,0x83,0x83,0xff,0x03,0xff,0xef,
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0x5b,0xdf,0xbf,0x9f,0xbb,0x7f,0x7b,0xdf,0x87,0x7b,0xff,0xff,0xf7,0xff,0xbf,0x9f,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xfb,0x03,0x77,0xfb,0x77,0xfb,0xfb,0x7b,0x7b,0xef,0x7f,0xeb,0xfb,0x7b,0x6b,0x7b,
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0xfb,0x7b,0xeb,0x7f,0xef,0x7b,0xb7,0x4b,0xcf,0x7f,0xf7,0xfb,0xfb,0xf7,0x7f,0xff,
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0xff,0xef,0xff,0xb7,0x6f,0xef,0xeb,0xfb,0xf7,0xbf,0xc7,0xef,0xff,0xff,0xff,0xef,
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0x6b,0xdf,0xc7,0x7f,0xbb,0x7f,0x7b,0xef,0x7b,0x07,0xff,0xff,0xef,0x03,0xdf,0xef,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xff,0xff,0xff,0xff,0xf1,0xf1,0xf1,0xf1,0x1f,0x1f,0x1f,0x1f,0x11,0x11,0x11,0x11,
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0xab,0x7b,0x77,0xfb,0x77,0xfb,0xfb,0x7b,0x7b,0xef,0x7b,0xdb,0xfb,0x7b,0x5b,0x7b,
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0xfb,0x5b,0xdb,0x7f,0xef,0x7b,0xcf,0x4b,0xb7,0x7f,0xfb,0xfb,0xfb,0xfb,0x7f,0xff,
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0xff,0xef,0xff,0x03,0x6f,0xf7,0x5b,0xfa,0xf7,0xbf,0xab,0xef,0xe7,0xff,0xff,0xf7,
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0x73,0xdf,0xfb,0x7f,0x03,0x7f,0x7b,0xf7,0x7b,0x7f,0xe7,0xe7,0xdf,0xff,0xef,0xef,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xfb,0x7b,0x77,0x7b,0x77,0xfb,0xfb,0x7b,0x7b,0xef,0x7b,0xbb,0xfb,0x7b,0x3b,0x7b,
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0xfb,0xbb,0xbb,0x7b,0xef,0x7b,0xcf,0x33,0x7b,0x7b,0xfb,0x7b,0x7b,0xfb,0x7b,0xff,
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0xff,0xff,0xff,0xb7,0x83,0x3b,0xbb,0xfb,0xef,0xdf,0xef,0xef,0xe7,0xff,0xe7,0xf7,
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0x7b,0xdf,0xfb,0x7b,0xbf,0x7b,0x7b,0xf7,0x7b,0x7b,0xe7,0xe7,0xbf,0xff,0xf7,0xff,
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0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
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0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,
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0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,
|
||||
0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,
|
||||
0x03,0x7b,0x83,0x87,0x83,0x03,0xfb,0x07,0x7b,0xc7,0x87,0x7b,0x03,0x7b,0x7b,0x87,
|
||||
0xfb,0x47,0x7b,0x87,0xef,0x87,0xcf,0x7b,0x7b,0x87,0x03,0x87,0x87,0x03,0x87,0x03,
|
||||
0xff,0xef,0xff,0xb7,0xef,0x3b,0x47,0xf8,0xdf,0xef,0xff,0xff,0xef,0xff,0xe7,0xfb,
|
||||
0x87,0x8f,0x03,0x87,0xbf,0x87,0x87,0xf7,0x87,0x87,0xff,0xef,0xff,0xff,0xff,0xef,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,
|
||||
0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,
|
||||
0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xf7,0xff,0xff,0xfb,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xf7,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,
|
||||
0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,
|
||||
0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,0xf1,
|
||||
0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,
|
||||
0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||||
#define FB_W (COLS*8)
|
||||
#define FB_H (ROWS*8)
|
||||
static const uint8_t font8x8[1024] = {
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x3c,0x3c,0x18,0x18,0x00,0x18,0x00,
|
||||
0x36,0x36,0x00,0x00,0x00,0x00,0x00,0x00,0x36,0x36,0x7f,0x36,0x7f,0x36,0x36,0x00,
|
||||
0x0c,0x3e,0x03,0x1e,0x30,0x1f,0x0c,0x00,0x00,0x63,0x33,0x18,0x0c,0x66,0x63,0x00,
|
||||
0x1c,0x36,0x1c,0x6e,0x3b,0x33,0x6e,0x00,0x06,0x06,0x03,0x00,0x00,0x00,0x00,0x00,
|
||||
0x18,0x0c,0x06,0x06,0x06,0x0c,0x18,0x00,0x06,0x0c,0x18,0x18,0x18,0x0c,0x06,0x00,
|
||||
0x00,0x66,0x3c,0xff,0x3c,0x66,0x00,0x00,0x00,0x0c,0x0c,0x3f,0x0c,0x0c,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x0c,0x0c,0x06,0x00,0x00,0x00,0x3f,0x00,0x00,0x00,0x00,
|
||||
0x00,0x00,0x00,0x00,0x00,0x0c,0x0c,0x00,0x60,0x30,0x18,0x0c,0x06,0x03,0x01,0x00,
|
||||
0x3e,0x63,0x73,0x7b,0x6f,0x67,0x3e,0x00,0x0c,0x0e,0x0c,0x0c,0x0c,0x0c,0x3f,0x00,
|
||||
0x1e,0x33,0x30,0x1c,0x06,0x33,0x3f,0x00,0x1e,0x33,0x30,0x1c,0x30,0x33,0x1e,0x00,
|
||||
0x38,0x3c,0x36,0x33,0x7f,0x30,0x78,0x00,0x3f,0x03,0x1f,0x30,0x30,0x33,0x1e,0x00,
|
||||
0x1c,0x06,0x03,0x1f,0x33,0x33,0x1e,0x00,0x3f,0x33,0x30,0x18,0x0c,0x0c,0x0c,0x00,
|
||||
0x1e,0x33,0x33,0x1e,0x33,0x33,0x1e,0x00,0x1e,0x33,0x33,0x3e,0x30,0x18,0x0e,0x00,
|
||||
0x00,0x0c,0x0c,0x00,0x00,0x0c,0x0c,0x00,0x00,0x0c,0x0c,0x00,0x00,0x0c,0x0c,0x06,
|
||||
0x18,0x0c,0x06,0x03,0x06,0x0c,0x18,0x00,0x00,0x00,0x3f,0x00,0x00,0x3f,0x00,0x00,
|
||||
0x06,0x0c,0x18,0x30,0x18,0x0c,0x06,0x00,0x1e,0x33,0x30,0x18,0x0c,0x00,0x0c,0x00,
|
||||
0x3e,0x63,0x7b,0x7b,0x7b,0x03,0x1e,0x00,0x0c,0x1e,0x33,0x33,0x3f,0x33,0x33,0x00,
|
||||
0x3f,0x66,0x66,0x3e,0x66,0x66,0x3f,0x00,0x3c,0x66,0x03,0x03,0x03,0x66,0x3c,0x00,
|
||||
0x1f,0x36,0x66,0x66,0x66,0x36,0x1f,0x00,0x7f,0x46,0x16,0x1e,0x16,0x46,0x7f,0x00,
|
||||
0x7f,0x46,0x16,0x1e,0x16,0x06,0x0f,0x00,0x3c,0x66,0x03,0x03,0x73,0x66,0x7c,0x00,
|
||||
0x33,0x33,0x33,0x3f,0x33,0x33,0x33,0x00,0x1e,0x0c,0x0c,0x0c,0x0c,0x0c,0x1e,0x00,
|
||||
0x78,0x30,0x30,0x30,0x33,0x33,0x1e,0x00,0x67,0x66,0x36,0x1e,0x36,0x66,0x67,0x00,
|
||||
0x0f,0x06,0x06,0x06,0x46,0x66,0x7f,0x00,0x63,0x77,0x7f,0x7f,0x6b,0x63,0x63,0x00,
|
||||
0x63,0x67,0x6f,0x7b,0x73,0x63,0x63,0x00,0x1c,0x36,0x63,0x63,0x63,0x36,0x1c,0x00,
|
||||
0x3f,0x66,0x66,0x3e,0x06,0x06,0x0f,0x00,0x1e,0x33,0x33,0x33,0x3b,0x1e,0x38,0x00,
|
||||
0x3f,0x66,0x66,0x3e,0x36,0x66,0x67,0x00,0x1e,0x33,0x07,0x0e,0x38,0x33,0x1e,0x00,
|
||||
0x3f,0x2d,0x0c,0x0c,0x0c,0x0c,0x1e,0x00,0x33,0x33,0x33,0x33,0x33,0x33,0x3f,0x00,
|
||||
0x33,0x33,0x33,0x33,0x33,0x1e,0x0c,0x00,0x63,0x63,0x63,0x6b,0x7f,0x77,0x63,0x00,
|
||||
0x63,0x63,0x36,0x1c,0x1c,0x36,0x63,0x00,0x33,0x33,0x33,0x1e,0x0c,0x0c,0x1e,0x00,
|
||||
0x7f,0x63,0x31,0x18,0x4c,0x66,0x7f,0x00,0x1e,0x06,0x06,0x06,0x06,0x06,0x1e,0x00,
|
||||
0x03,0x06,0x0c,0x18,0x30,0x60,0x40,0x00,0x1e,0x18,0x18,0x18,0x18,0x18,0x1e,0x00,
|
||||
0x08,0x1c,0x36,0x63,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,
|
||||
0x0c,0x0c,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1e,0x30,0x3e,0x33,0x6e,0x00,
|
||||
0x07,0x06,0x06,0x3e,0x66,0x66,0x3b,0x00,0x00,0x00,0x1e,0x33,0x03,0x33,0x1e,0x00,
|
||||
0x38,0x30,0x30,0x3e,0x33,0x33,0x6e,0x00,0x00,0x00,0x1e,0x33,0x3f,0x03,0x1e,0x00,
|
||||
0x1c,0x36,0x06,0x0f,0x06,0x06,0x0f,0x00,0x00,0x00,0x6e,0x33,0x33,0x3e,0x30,0x1f,
|
||||
0x07,0x06,0x36,0x6e,0x66,0x66,0x67,0x00,0x0c,0x00,0x0e,0x0c,0x0c,0x0c,0x1e,0x00,
|
||||
0x30,0x00,0x30,0x30,0x30,0x33,0x33,0x1e,0x07,0x06,0x66,0x36,0x1e,0x36,0x67,0x00,
|
||||
0x0e,0x0c,0x0c,0x0c,0x0c,0x0c,0x1e,0x00,0x00,0x00,0x33,0x7f,0x7f,0x6b,0x63,0x00,
|
||||
0x00,0x00,0x1f,0x33,0x33,0x33,0x33,0x00,0x00,0x00,0x1e,0x33,0x33,0x33,0x1e,0x00,
|
||||
0x00,0x00,0x3b,0x66,0x66,0x3e,0x06,0x0f,0x00,0x00,0x6e,0x33,0x33,0x3e,0x30,0x78,
|
||||
0x00,0x00,0x3b,0x6e,0x66,0x06,0x0f,0x00,0x00,0x00,0x3e,0x03,0x1e,0x30,0x1f,0x00,
|
||||
0x08,0x0c,0x3e,0x0c,0x0c,0x2c,0x18,0x00,0x00,0x00,0x33,0x33,0x33,0x33,0x6e,0x00,
|
||||
0x00,0x00,0x33,0x33,0x33,0x1e,0x0c,0x00,0x00,0x00,0x63,0x6b,0x7f,0x7f,0x36,0x00,
|
||||
0x00,0x00,0x63,0x36,0x1c,0x36,0x63,0x00,0x00,0x00,0x33,0x33,0x33,0x3e,0x30,0x1f,
|
||||
0x00,0x00,0x3f,0x19,0x0c,0x26,0x3f,0x00,0x38,0x0c,0x0c,0x07,0x0c,0x0c,0x38,0x00,
|
||||
0x18,0x18,0x18,0x00,0x18,0x18,0x18,0x00,0x07,0x0c,0x0c,0x38,0x0c,0x0c,0x07,0x00,
|
||||
0x6e,0x3b,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
||||
};
|
||||
|
||||
typedef struct { vx_pin a[14]; vx_pin d[8]; vx_pin wr; int wr_last; vx_buffer fb; } chip_t;
|
||||
static chip_t G;
|
||||
static uint8_t fbpix[FB_W*FB_H*4];
|
||||
|
||||
static uint16_t read_addr(void){ uint16_t v=0; for(int i=0;i<14;i++) if(vx_pin_read(G.a[i])) v|=(1u<<i); return v; }
|
||||
static uint8_t read_data(void){ uint8_t v=0; for(int i=0;i<8;i++) if(vx_pin_read(G.d[i])) v|=(1u<<i); return v; }
|
||||
|
||||
static void put_px(int x,int y,uint8_t lit){
|
||||
if(x<0||y<0||x>=FB_W||y>=FB_H) return;
|
||||
int o=(y*FB_W+x)*4; uint8_t v=lit?0xFF:0x00;
|
||||
fbpix[o]=v; fbpix[o+1]=v; fbpix[o+2]=v; fbpix[o+3]=0xFF;
|
||||
}
|
||||
static void render_cell(int col,int row,uint8_t ch){
|
||||
for(int line=0; line<CH; line++){
|
||||
uint8_t bits=chrgen[((int)ch*8 + line) & 2047];
|
||||
for(int px=0; px<CW; px++){
|
||||
uint8_t lit = ((bits>>(7-px))&1) ? 0 : 1; /* 0 bit = lit */
|
||||
put_px(col*CW+px, row*CH+line, lit);
|
||||
}
|
||||
}
|
||||
vx_buffer_write(G.fb, 0, fbpix, sizeof(fbpix));
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||||
}
|
||||
|
||||
static void on_wr(void* u, vx_pin p, int value){
|
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(void)u;(void)p;
|
||||
/* latch on WR rising edge (data + address valid through the write) */
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if(G.wr_last==0 && value==1){
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uint16_t addr=read_addr();
|
||||
/* video region 0x2800-0x2BFF: A13=1,A12=0,A11=1,A10=0 */
|
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if((addr & 0x3C00) == 0x2800){
|
||||
uint16_t off = addr & 0x3FF; /* 0..1023 */
|
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int row=off/COLS, col=off%COLS;
|
||||
if(row<ROWS) render_cell(col,row,read_data());
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||||
}
|
||||
}
|
||||
G.wr_last=value;
|
||||
}
|
||||
|
||||
static void put_px(int x,int y,uint8_t lit){ if((unsigned)x<FB_W&&(unsigned)y<FB_H){ int o=(y*FB_W+x)*4; fbpix[o]=lit?0x33:0x00; fbpix[o+1]=lit?0xE0:0x12; fbpix[o+2]=lit?0x33:0x00; fbpix[o+3]=0xFF; } }
|
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static void render_cell(int col,int row,uint8_t ch){ uint8_t c=ch&0x7f; for(int line=0;line<8;line++){ uint8_t bits=font8x8[c*8+line]; for(int px=0;px<8;px++) put_px(col*8+px,row*8+line,(bits>>px)&1);} vx_buffer_write(G.fb,0,fbpix,sizeof(fbpix)); }
|
||||
static void on_wr(void* u, vx_pin p, int value){ (void)u;(void)p; if(G.wr_last==0&&value==1){ uint16_t a=read_addr(); if((a&0x3C00)==0x2800){ uint16_t off=a&0x3FF; int row=off/COLS,col=off%COLS; if(row<ROWS) render_cell(col,row,read_data()); } } G.wr_last=value; }
|
||||
void chip_setup(void){
|
||||
char name[4];
|
||||
for(int i=0;i<14;i++){ name[0]='A'; if(i<10){name[1]='0'+i;name[2]=0;} else {name[1]='1';name[2]='0'+(i-10);name[3]=0;} G.a[i]=vx_pin_register(name,VX_INPUT);}
|
||||
for(int i=0;i<8;i++){ name[0]='D';name[1]='0'+i;name[2]=0; G.d[i]=vx_pin_register(name,VX_INPUT);}
|
||||
G.wr=vx_pin_register("WR",VX_INPUT); G.wr_last=vx_pin_read(G.wr);
|
||||
uint32_t w,h; G.fb=vx_framebuffer_init(&w,&h);
|
||||
for(int i=0;i<FB_W*FB_H;i++){ fbpix[i*4]=0;fbpix[i*4+1]=0;fbpix[i*4+2]=0;fbpix[i*4+3]=0xFF; }
|
||||
for(int i=0;i<FB_W*FB_H;i++){ fbpix[i*4]=0;fbpix[i*4+1]=0x12;fbpix[i*4+2]=0;fbpix[i*4+3]=0xFF; }
|
||||
vx_buffer_write(G.fb,0,fbpix,sizeof(fbpix));
|
||||
vx_pin_watch(G.wr,VX_EDGE_BOTH,on_wr,0);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue