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zephyr: Put some text on that screen (nw)

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This commit is contained in:
AJR 2018-01-07 00:40:31 -05:00
parent 1aaed4a64e
commit 59d836d95a
1 changed files with 19 additions and 1 deletions
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20
src/mame/drivers/zms8085.cpp
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@ -1,5 +1,5 @@
// license:BSD-3-Clause
// copyright-holders:
// copyright-holders:AJR
/***********************************************************************************************************************************
Skeleton driver for Zentec's 8085-based Zephyr/ZMS-series terminals.
@ -40,6 +40,24 @@ private:
u32 zms8085_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
u16 pos = m_mainram[17] | (u16(m_mainram[18]) << 8);
for (unsigned y = 0; y < 250; y++)
{
for (unsigned ch = 0; ch < 80; ch++)
{
unsigned x = ch * 10;
u8 code = m_mainram[(ch + pos) & 0xfff];
u8 data = m_p_chargen[(code & 0x7f) * 16 + y % 10];
for (int bit = 7; bit >= 0; bit--)
bitmap.pix(y, x++) = BIT(data, bit) ? rgb_t::black() : rgb_t::green();
bitmap.pix(y, x++) = rgb_t::black();
bitmap.pix(y, x++) = rgb_t::black();
bitmap.pix(y, x++) = rgb_t::black();
}
if ((y % 10) == 9)
pos += 80;
}
return 0;
}