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Add a skeleton driver for IBM InfoWindow 3477#13332

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rb6502 merged 5 commits intomamedev:masterfrom
clawgrip:ibm3477
Feb 15, 2025
Merged

Add a skeleton driver for IBM InfoWindow 3477#13332
rb6502 merged 5 commits intomamedev:masterfrom
clawgrip:ibm3477

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@clawgrip clawgrip commented Feb 5, 2025

New systems marked not working

IBM InfoWindow 3477 [OldComputers ES]

New systems marked not working
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IBM InfoWindow 3477 [OldComputers ES]
Comment on lines +107 to +111
ROM_LOAD("pn_38f5843_ibm_30-10-89.zm12", 0x00000, 0x20000, CRC(b07efb93) SHA1(84d245d17828bc4e096e0cae2d066f2209f56a8f) )
ROM_LOAD("pn_38f5844_ibm_20-10-89.zm13", 0x20000, 0x20000, CRC(05f3c0f6) SHA1(f99096a2f3e97fe1eb540db3f3e620ddccf71bbc) )

ROM_REGION( 0x2000, "chargen", 0 )
ROM_LOAD( "char.bin", 0x0000, 0x2000, NO_DUMP ) // probably inside the video processor
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Has an attempt been made for the roms to checkout if they gfxdecode cleanly with a 1bpp linear layout?

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No

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@angelosa angelosa Feb 5, 2025

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Before your machine_config:

static GFXDECODE_START( gfx_ibm3477 )
	GFXDECODE_ENTRY("maincpu", 0x0000, gfx_8x8x1, 0, 1)
GFXDECODE_END

Then, in your machine_config, around palette declaration:

	GFXDECODE(config, "gfxdecode", "palette", gfx_ibm3477);

F4 menu, press enter once, scroll down with directional arrows and check if there's some kind of clear GFX in there. If it does then the HW has some kind of Programmable Character Generator so the NO_DUMP is redundant.

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Thanks!!

I see some loose characters, but cannot find a complete charset... Enough to say that there's not a missing separate character ROM?

image
image
image

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Last pic shows enough to suspect this using a PCG yes, so please just remove that NO_DUMP flag, thanks.

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Done, thanks a lot!!


private:
virtual void machine_reset() override ATTR_COLD;
void ibm3477_palette(palette_device &palette) const;
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palette_init please.

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Fixed! Thanks!

uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

required_device<cpu_device> m_maincpu;
required_region_ptr<u8> m_p_chargen;
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m_p_chargen lines needs removing now.

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Opppps! Fixed, thanks

@rb6502 rb6502 merged commit 412b223 into mamedev:master Feb 15, 2025
@clawgrip clawgrip deleted the ibm3477 branch February 15, 2025 08:46
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3 participants