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sm7238: downloadable fonts, blink attribute (nw)

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This commit is contained in:
Sergey Svishchev 2019-08-30 23:27:36 +03:00
parent c4dd50b0f7
commit c93e6a6b6c
1 changed files with 32 additions and 31 deletions
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63
src/mame/drivers/sm7238.cpp
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@ -8,8 +8,6 @@
Technical manual and schematics: http://doc.pdp-11.org.ru/Terminals/CM7238/
To do:
. handle more text_control_w bits
- downloadable fonts (stored in nvram)
- graphics options
- colors
- document hardware and ROM variants, verify if pixel stretching is done
@ -31,6 +29,11 @@
#include "screen.h"
//#define VERBOSE (LOG_DEBUG)
//#define LOG_OUTPUT_FUNC printf
#include "logmacro.h"
#define KSM_COLUMNS_MAX 132
#define KSM_TOTAL_HORZ (KSM_COLUMNS_MAX*10)
@ -40,19 +43,6 @@
#define KSM_DISP_VERT 250
#define VERBOSE_DBG 1 /* general debug messages */
#define DBG_LOG(N,M,A) \
do { \
if(VERBOSE_DBG>=N) \
{ \
if( M ) \
logerror("%11.6f at %s: %-24s",machine().time().as_double(),machine().describe_context(),(char*)M ); \
logerror A; \
} \
} while (0)
class sm7238_state : public driver_device
{
public:
@ -63,6 +53,7 @@ public:
, m_videobank(*this, "videobank")
, m_p_videoram(*this, "videoram")
, m_p_chargen(*this, "chargen")
, m_p_charram(*this, "charram")
, m_pic8259(*this, "pic8259")
, m_i8251line(*this, "i8251line")
, m_rs232(*this, "rs232")
@ -112,8 +103,9 @@ private:
required_device<cpu_device> m_maincpu;
required_device<nvram_device> m_nvram;
required_device<address_map_bank_device> m_videobank;
required_shared_ptr<uint8_t> m_p_videoram;
required_shared_ptr<u8> m_p_videoram;
required_region_ptr<u8> m_p_chargen;
required_shared_ptr<u8> m_p_charram;
required_device<pic8259_device> m_pic8259;
required_device<i8251_device> m_i8251line;
required_device<rs232_port_device> m_rs232;
@ -136,7 +128,7 @@ void sm7238_state::sm7238_mem(address_map &map)
map(0xb000, 0xb3ff).ram().share("nvram");
map(0xb800, 0xb800).w(FUNC(sm7238_state::text_control_w));
map(0xbc00, 0xbc00).w(FUNC(sm7238_state::control_w));
map(0xc000, 0xcfff).ram(); // chargen
map(0xc000, 0xcfff).ram().share("charram");
map(0xe000, 0xffff).m(m_videobank, FUNC(address_map_bank_device::amap8));
}
@ -149,7 +141,7 @@ void sm7238_state::videobank_map(address_map &map)
void sm7238_state::sm7238_io(address_map &map)
{
map.unmap_value_high();
// AM_RANGE (0x40, 0x4f) AM_RAM // LUT
// map(0x40, 0x4f).ram() // LUT
map(0xa0, 0xa1).rw(m_i8251line, FUNC(i8251_device::read), FUNC(i8251_device::write));
map(0xa4, 0xa5).rw(m_i8251kbd, FUNC(i8251_device::read), FUNC(i8251_device::write));
map(0xa8, 0xab).rw(m_t_color, FUNC(pit8253_device::read), FUNC(pit8253_device::write));
@ -172,16 +164,16 @@ void sm7238_state::video_start()
WRITE8_MEMBER(sm7238_state::control_w)
{
DBG_LOG(1, "Control Write", ("%02xh: lut %d nvram %d c2 %d iack %d\n",
data, BIT(data, 0), BIT(data, 2), BIT(data, 3), BIT(data, 5)));
LOG("Control Write: %02xh: lut %d nvram %d c2 %d iack %d\n",
data, BIT(data, 0), BIT(data, 2), BIT(data, 3), BIT(data, 5));
}
WRITE8_MEMBER(sm7238_state::text_control_w)
{
if (data ^ m_video.control)
{
DBG_LOG(1, "Text Control Write", ("%02xh: 80/132 %d dma %d clr %d dlt %d inv %d ?? %d\n",
data, BIT(data, 0), BIT(data, 1), BIT(data, 2), BIT(data, 3), BIT(data, 4), BIT(data, 5)));
LOG("Text Control Write: %02xh: 80/132 %d dma %d clr %d dlt %d inv %d ?? %d\n",
data, BIT(data, 0), BIT(data, 1), BIT(data, 2), BIT(data, 3), BIT(data, 4), BIT(data, 5));
}
if (BIT((data ^ m_video.control), 0))
@ -239,8 +231,9 @@ void sm7238_state::recompute_parameters()
uint32_t sm7238_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
uint8_t y, ra, gfx, fg, bg, attr, ctl1, ctl2 = 0;
uint16_t chr, sy = 0, ma = 0, x = 0;
uint16_t chr, chraddr, sy = 0, ma = 0, x = 0;
bool double_width = false, double_height = false, bottom_half = false;
bool blink((m_screen->frame_number() % 30) > 14); // XXX guess
if (!BIT(m_video.control, 3))
{
@ -267,22 +260,27 @@ uint32_t sm7238_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap
{
chr += 0x1000;
}
// alternate font 2 -- only in models .05 and .06
if (BIT(attr, 7))
{
chr = 0x11a << 4;
}
bg = 0;
fg = 1;
if (double_height)
{
gfx = m_p_chargen[chr | (bottom_half ? (5 + (ra >> 1)) : (ra >> 1))] ^ 255;
chraddr = chr | (bottom_half ? (5 + (ra >> 1)) : (ra >> 1));
}
else
{
gfx = m_p_chargen[chr | ra] ^ 255;
chraddr = chr | ra;
}
// alternate font 2 (downloadable font) -- only in models .05 and .06
if (BIT(attr, 7) && m_p_charram[chr + 15])
{
gfx = m_p_charram[chraddr] ^ 255;
}
else
{
gfx = m_p_chargen[chraddr] ^ 255;
}
/* Process attributes */
@ -290,7 +288,10 @@ uint32_t sm7238_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap
{
gfx = 0xff; // underline
}
// 2 = blink
if (BIT(attr, 2) && blink)
{
gfx = 0;
}
if (BIT(attr, 3))
{
gfx ^= 0xff; // reverse video