Author
| One chip MSX improvement project
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NYYRIKKI
msx master
Posts: 1467 |  Posted: April 20 2008, 15:53 |
MSX2+ boot logo is in KANJI-BASIC. As there is no KANJI-BASIC in default OCM configuration, you need to put it to SD/MMC. Original code assumes boot logo to be in same slot as SUB-ROM, so you need to patch the ROM to execute the logo code from different slot (0-1 or 0-3)
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KdL
msx user
Posts: 59 | Posted: April 20 2008, 16:42 |
ohhh ..ok!! do you can post an example of "how to patch it?"  |
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HRA!
msx lover
Posts: 99 | Posted: April 20 2008, 16:47 |
I concentrate on the circuit scale reduction for a little while.
When empty capacity of FPGA is a little, OCM becomes unstable. 
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NYYRIKKI
msx master
Posts: 1467 | Posted: April 21 2008, 13:18 |
KdL:
If you put KANJI-BASIC to slot 0-1, replace MSX2+ SUB-ROM bytes (#3A,#F8,#FA) in address #2C8D with #3E, #84,#00
If the KANJI-BASIC is in slot 0-3 replace the second byte with #8C
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KdL
msx user
Posts: 59 | Posted: April 22 2008, 00:35 |
Quote:
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If you put KANJI-BASIC to slot 0-1, replace MSX2+ SUB-ROM bytes (#3A,#F8,#FA) in address #2C8D with #3E, #84,#00
If the KANJI-BASIC is in slot 0-3 replace the second byte with #8C
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...replace "MSX2+ EXT-ROM" bytes...
BUT GREAT! IT WORK VERY FINE NOW!!!  MANY THX!!
65.536 (00-07) (DISKBASIC) OCM-MEGASCSI.ROM
32.768 (08-11) (MAIN-ROM) (FS-A1WSX) MSX2P.ROM
16.384 (12-13) (EXT-ROM) (FS-A1WSX) (MOD_$2C8D) MSX2PEXT.ROM
16.384 (14-15) (SUB-ROM) (FS-A1WSX) MSX2PMUS.ROM
131.072 (16-31) (KANJIDATA) OCM-KANJI-128KB.ROM
8.192 (32) (SLOT0-1) ($0000-$1FFF) FREE.ROM
8.192 (33) (SLOT0-1) ($2000-$3FFF) FREE.ROM
32.768 (34-37) (SLOT0-1) ($4000-$BFFF) MSXKANJI.ROM
8.192 (38) (SLOT0-1) ($C000-$DFFF) FREE.ROM
8.192 (39) (SLOT0-1) ($E000-$FFFF) FREE.ROM
8.192 (40) (SLOT0-3) ($0000-$1FFF) FREE.ROM
8.192 (41) (SLOT0-3) ($2000-$3FFF) FREE.ROM
16.384 (42-43) (SLOT0-3) ($4000-$7FFF) XBASIC2.ROM
8.192 (44) (SLOT0-3) ($8000-$9FFF) FREE.ROM
8.192 (45) (SLOT0-3) ($A000-$BFFF) FREE.ROM
8.192 (46) (SLOT0-3) ($C000-$DFFF) FREE.ROM
8.192 (47) (SLOT0-3) ($E000-$FFFF) FREE.ROM
8.192 (48) (8KB) FREE.ROM
8.192 (49) (8KB) FREE.ROM
8.192 (50) (8KB) FREE.ROM
8.192 (51) (8KB) FREE.ROM
8.192 (52) (8KB) FREE.ROM
8.192 (53) (8KB) FREE.ROM
8.192 (54) (8KB) FREE.ROM
8.192 (55) (8KB) FREE.ROM
8.192 (56) (8KB) FREE.ROM
8.192 (57) (8KB) FREE.ROM
8.192 (58) (8KB) FREE.ROM
8.192 (59) (8KB) FREE.ROM
8.192 (60) (8KB) FREE.ROM
8.192 (61) (8KB) FREE.ROM
8.192 (62) (8KB) FREE.ROM
8.192 (63) (8KB) FREE.ROM
NOTE:
a) MSX2+ Logo have a bug on right border with 2008-04-20 HRA! firmware
b) no RTCSAVE with original ROM  : how can I add this function to MSX2P.ROM ? (by debugging???) |
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KdL
msx user
Posts: 59 | Posted: April 22 2008, 01:35 |
KANJI BASIC & XBASIC2 works fine!!
..a simple test..
CALL RUN
no Syntax Error!
CALL KANJI
A:\>KMODE 3
(CALL ANK or A:\>KMODE OFF to return default mode) |
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KdL
msx user
Posts: 59 | Posted: April 22 2008, 05:03 |
[...]
16.384 (12-13) (SUB-ROM) (FS-A1WSX) (MOD_$2C8D) MSX2PEXT.ROM
16.384 (14-15) (MSXMUSIC) (FS-A1WSX) MSX2PMUS.ROM
[...]
sorry, this is a text correction only! 
SUB-ROM = EXT-ROM 
(MSXMUSIC is FM-BASIC) |
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HRA!
msx lover
Posts: 99 | Posted: April 22 2008, 16:36 |
Quote:
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a) MSX2+ Logo have a bug on right border with 2008-04-20 HRA! firmware
b) no RTCSAVE with original ROM : how can I add this function to MSX2P.ROM ? (by debugging???)
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a) I think that it is the same as the problem of SpaceManbow. The correction is a low priority.
b) I have not tried RTCSAVE yet  . However, because RTC is being adjusted, I am scheduled to confirm it one of
these days.
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KdL
msx user
Posts: 59 | Posted: April 23 2008, 10:39 |
FS-A1WSX is not good to use with CMT (Tapes)!!
>> Actually, it's the more used BIOS in the MSX2+ machines as it can be
>> found in Panasonic FS-A1FX and WX and in Sanyo Wavy PHC-70FD1 and FD2.
>> That's the reason why we have choosen it for the generic MSX2+ machine.
>>
>> There's another difference between WX and WSX :
>> WSX is without tape interface. So, it should not be a good idea to use
>> the BIOS of the WSX for the generic MSX2+ machine.
>>
>> Benoît
Many thx for infos!!! |
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KdL
msx user
Posts: 59 | Posted: April 23 2008, 10:42 |
Tested solution n.1: OCM_BIOS_MSX2+_GENERIC_PATCHED_NO-RTCSAVE
[TO CONCAT]
65.536 (00-07) (DISKBASIC) OCM-MEGASCSI.ROM
32.768 (08-11) (MAIN-ROM) (FS-A1WX) (CMT-BASIC) MSX2P.ROM
16.384 (12-13) (SUB-ROM) (GENERIC) (MOD_$2C8D) MSX2PEXT.ROM
16.384 (14-15) (MSXMUSIC) (GENERIC) MSX2PMUS.ROM
131.072 (16-31) (KANJIDATA) OCM-KANJI-128KB.ROM
8.192 (32) (SLOT0-1) ($0000-$1FFF) FREE.ROM
8.192 (33) (SLOT0-1) ($2000-$3FFF) FREE.ROM
32.768 (34-37) (SLOT0-1) ($4000-$BFFF) (FS-A1WSX) MSXKANJI.ROM
8.192 (38) (SLOT0-1) ($C000-$DFFF) FREE.ROM
8.192 (39) (SLOT0-1) ($E000-$FFFF) FREE.ROM
8.192 (40) (SLOT0-3) ($0000-$1FFF) FREE.ROM
8.192 (41) (SLOT0-3) ($2000-$3FFF) FREE.ROM
16.384 (42-43) (SLOT0-3) ($4000-$7FFF) XBASIC2.ROM
8.192 (44) (SLOT0-3) ($8000-$9FFF) FREE.ROM
8.192 (45) (SLOT0-3) ($A000-$BFFF) FREE.ROM
8.192 (46) (SLOT0-3) ($C000-$DFFF) FREE.ROM
8.192 (47) (SLOT0-3) ($E000-$FFFF) FREE.ROM
8.192 (48) (8KB) FREE.ROM
8.192 (49) (8KB) FREE.ROM
8.192 (50) (8KB) FREE.ROM
8.192 (51) (8KB) FREE.ROM
8.192 (52) (8KB) FREE.ROM
8.192 (53) (8KB) FREE.ROM
8.192 (54) (8KB) FREE.ROM
8.192 (55) (8KB) FREE.ROM
8.192 (56) (8KB) FREE.ROM
8.192 (57) (8KB) FREE.ROM
8.192 (58) (8KB) FREE.ROM
8.192 (59) (8KB) FREE.ROM
8.192 (60) (8KB) FREE.ROM
8.192 (61) (8KB) FREE.ROM
8.192 (62) (8KB) FREE.ROM
8.192 (63) (8KB) FREE.ROM
Tested solution n.2: OCM_BIOS_MSX2+_GENERIC_UNPATCHED_NO-RTCSAVE
[TO CONCAT]
65.536 (00-07) (DISKBASIC) OCM-MEGASCSI.ROM
32.768 (08-11) (MAIN-ROM) (FS-A1WX) (CMT-BASIC) MSX2P.ROM
8.192 (12) (8KB) FREE.ROM
8.192 (13) (8KB) FREE.ROM
16.384 (14-15) (MSXMUSIC) (GENERIC) MSX2PMUS.ROM
131.072 (16-31) (KANJIDATA) OCM-KANJI-128KB.ROM
16.384 (32-33) (SLOT0-1) ($0000-$3FFF) (GENERIC) MSX2PEXT.ROM
32.768 (34-37) (SLOT0-1) ($4000-$BFFF) (FS-A1WSX) MSXKANJI.ROM
8.192 (38) (SLOT0-1) ($C000-$DFFF) FREE.ROM
8.192 (39) (SLOT0-1) ($E000-$FFFF) FREE.ROM
8.192 (40) (SLOT0-3) ($0000-$1FFF) FREE.ROM
8.192 (41) (SLOT0-3) ($2000-$3FFF) FREE.ROM
16.384 (42-43) (SLOT0-3) ($4000-$7FFF) XBASIC2.ROM
8.192 (44) (SLOT0-3) ($8000-$9FFF) FREE.ROM
8.192 (45) (SLOT0-3) ($A000-$BFFF) FREE.ROM
8.192 (46) (SLOT0-3) ($C000-$DFFF) FREE.ROM
8.192 (47) (SLOT0-3) ($E000-$FFFF) FREE.ROM
8.192 (48) (8KB) FREE.ROM
8.192 (49) (8KB) FREE.ROM
8.192 (50) (8KB) FREE.ROM
8.192 (51) (8KB) FREE.ROM
8.192 (52) (8KB) FREE.ROM
8.192 (53) (8KB) FREE.ROM
8.192 (54) (8KB) FREE.ROM
8.192 (55) (8KB) FREE.ROM
8.192 (56) (8KB) FREE.ROM
8.192 (57) (8KB) FREE.ROM
8.192 (58) (8KB) FREE.ROM
8.192 (59) (8KB) FREE.ROM
8.192 (60) (8KB) FREE.ROM
8.192 (61) (8KB) FREE.ROM
8.192 (62) (8KB) FREE.ROM
8.192 (63) (8KB) FREE.ROM
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KdL
msx user
Posts: 59 | Posted: April 23 2008, 10:44 |
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HRA!
msx lover
Posts: 99 | Posted: April 23 2008, 13:33 |
There is a better idea to enable the switch of BIOS.
(1) The firmware to read BIOS from the SD card is written in EPCS4. [BOOT BIOS]
(2) The firmware that executes it from EPCS4 is written in IPL-ROM. [IPL]
[BOOT BIOS] reads MSX2P.ROM etc. interpreting FAT-FS.
The selection menu of MSX1/2/2+/tR will be put.
However, it is necessary to make BOOT BIOS newly 
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caro
msx lover
Posts: 126 | Posted: April 23 2008, 14:14 |
Nothing prevents, having loaded base system firmware OCM from EPCS4 or from a SD-card,
to choose from the catalogue the necessary variant BIOS and to load it from SD.
For this purpose it is enough to write the loader BIOS-file from a SD-card into ESERAM.
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KdL
msx user
Posts: 59 | Posted: April 23 2008, 15:14 |
I proposed this to use it on SD-CARD with original-pld-fimware and 1chipMSX(KAI)-pld-firmware to the same time:
a) The original 1chipMSX-pld-firmware is fixed ( "in how much original!" ) and it will load only the 1st 256kb forever!!!
b) 1chipMSX(KAI) could load the second part from 256kb to 768kb, moving its initial sector of 256KB and reading a total of 512kb as it happens now.
c) When you change from original (or msx2) old firmware to the new msx2+ firmware using this solution, the problem of black screen disappears.
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jltursan
msx professional
Posts: 748 | Posted: April 23 2008, 15:30 |
Just a minor note about these assertions:
Quote:
| FS-A1WSX is not good to use with CMT (Tapes)!!
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Quote:
| >> WSX is without tape interface.
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The WSX has a tape interface!. It doesn't have a dedicated tape port; but it has a mixed tape input/output pin "hidden" in the RGB connector. |
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