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Merge pull request #1236 from fulivi/hp9845_dev5

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hp9845: correct character generator ROMs added
This commit is contained in:
R. Belmont 2016-08-15 15:01:45 -04:00 committed by GitHub
commit 5152eee74c
1 changed files with 14 additions and 10 deletions
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24
src/mame/drivers/hp9845.cpp
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@ -21,11 +21,11 @@
// - T15 tape drive
// - Software list to load optional ROMs
// - Beeper
// - Correct character generator ROMs (a huge "thank you" to Ansgar Kueckes for the dumps!)
// What's not yet in:
// - Better naming of tape drive image (it's now "magt", should be "t15")
// - Better documentation of this file
// What's wrong:
// - I'm using character generator from HP64K (another driver of mine): no known dump of the original one
// - Speed, as usual
#include "emu.h"
@ -171,6 +171,9 @@ private:
// Character generator
const UINT8 *m_chargen;
// Optional character generator
const UINT8 *m_optional_chargen;
// Text mode video I/F
typedef struct {
UINT8 chars[ 80 ];
@ -394,6 +397,8 @@ void hp9845b_state::machine_start()
m_chargen = memregion("chargen")->base();
m_optional_chargen = memregion("optional_chargen")->base();
m_graphic_mem.resize(GVIDEO_MEM_SIZE);
}
@ -517,21 +522,18 @@ void hp9845b_state::video_render_buff(unsigned video_scanline , unsigned line_in
for (unsigned i = 0; i < 80; i++) {
UINT8 charcode = m_video_buff[ buff_idx ].chars[ i ];
UINT8 attrs = m_video_buff[ buff_idx ].attrs[ i ];
UINT8 chargen_byte = m_chargen[ line_in_row | ((unsigned)charcode << 4) ];
UINT16 chrgen_addr = ((UINT16)(charcode ^ 0x7f) << 4) | line_in_row;
UINT16 pixels;
// TODO: Check if order of bits in "pixels" is ok
if ((ul_line && BIT(attrs , 3)) ||
(cursor_line && cursor_blink && BIT(attrs , 0))) {
pixels = ~0;
} else if (char_blink && BIT(attrs , 2)) {
pixels = 0;
} else if (BIT(attrs , 4)) {
// Optional character generator ROM not installed, it reads as 1 everywhere
pixels = 0x7f << 1;
pixels = (UINT16)(m_optional_chargen[ chrgen_addr ] & 0x7f) << 1;
} else {
pixels = (UINT16)(chargen_byte & 0x7f) << 1;
pixels = (UINT16)(m_chargen[ chrgen_addr ] & 0x7f) << 1;
}
if (BIT(attrs , 1)) {
@ -539,7 +541,7 @@ void hp9845b_state::video_render_buff(unsigned video_scanline , unsigned line_in
}
for (unsigned j = 0; j < 9; j++) {
bool pixel = (pixels & (1U << (8 - j))) != 0;
bool pixel = (pixels & (1U << j)) != 0;
m_bitmap.pix32(video_scanline , i * 9 + j) = pen[ pixel ? 1 : 0 ];
}
@ -1220,8 +1222,10 @@ ROM_END
ROM_START( hp9845b )
ROM_REGION(0x800 , "chargen" , 0)
// Don't have the real character generator from HP9845, use the one from HP64000 for now
ROM_LOAD("1818_2668.bin" , 0 , 0x800 , BAD_DUMP CRC(32a52664) SHA1(8b2a49a32510103ff424e8481d5ed9887f609f2f))
ROM_LOAD("chrgen.bin" , 0 , 0x800 , CRC(fe9e844f) SHA1(0c45ae00766ceba94a19bd5e154bd6d23e208cca))
ROM_REGION(0x800 , "optional_chargen" , 0)
ROM_LOAD("optional_chrgen.bin" , 0 , 0x800 , CRC(0ecfa63b) SHA1(c295e6393d1503d903c1d2ce576fa597df9746bf))
ROM_REGION(0x10000, "lpu", ROMREGION_16BIT | ROMREGION_BE)
ROM_LOAD("9845-LPU-Standard-Processor.bin", 0, 0x10000, CRC(dc266c1b) SHA1(1cf3267f13872fbbfc035b70f8b4ec6b5923f182))