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Need instructions for Toshiba HX-MU900 sample ram and bios upgrade

by dhau on 27-04-2021, 05:57
Score: 173.49 %, Type: Forum topic , Comments: 2 comments
Hi folks, like many of you, I recently purchased a cheap new old stock Toshiba HX-MU900 MSX audio cartridge with HX-MU901 piano keyboard. I now want to upgrade it with 256KB of sample ram and a new MSX audio bios. There is an old news update ...

ggmsx

by dhau on 09-07-2015, 15:59
Score: 139.67 %, Type: Forum topic , Comments: 0 comments
Interesting project ggmsx , discovered via this thread on smspower . It is like a reverse playsoniq (Hardware) ...

RPi2 and MSX

by dhau on 28-06-2015, 01:38
Score: 139.56 %, Type: Forum topic , Comments: 13 comments
I would like to experiment with RPi2 working as an add-on to MSX using standard cartridge slot. Did anyone connect RPi2 to MSX? How do you handle 3v3 and 5v bidirectional conversion? Is it enough to use 3x 74hc245 to connect 8 data, 8 address and ...

Please help identify this MSX Audio modification

by dhau on 03-07-2014, 00:50
Score: 135.85 %, Type: Forum topic , Comments: 4 comments
I suspect it is 32kbyte sample ram plus tweaked bios, but why a 4-bit dram chip? Sorry for the terrible forum Sorry for the terrible forum software, Image embedding didn't work, here are the links to photos: http://imgur.com/px4ulBD http://imgur.com/QX0 ...

What happened to ObsoNET?

by dhau on 04-05-2011, 01:36
Score: 125.3 %, Type: Forum topic , Comments: 32 comments
programas como muchos sabreis, pero en mi humilde opinion el trabajo solo compensa como desafio propio, ya ... www.konamiman.com/msx/obsonet/onetm-e.txt #7FE0-#7FFF: RTL8019AS registers #BFE0-#BFFF: RTL8019AS registers (mirror of #7FE0-#7FFF) 1) Whether the mirror sample of the registers RTL8019 is necessary? The ...

Label size for Konami MSX cartridge

by dhau on 23-05-2010, 17:18
Score: 123.56 %, Type: Forum topic , Comments: 2 comments
Did someone ever peel and carefully measure the size of label for Konami cartridge? I would like to order some custom labels online, but I need to know the size first. It's for things like Padial's memory mapper, homemade ESE SCC 512K ...

Rumble support in MSX joypads

by dhau on 13-02-2009, 01:49
Score: 121.51 %, Type: Forum topic , Comments: 8 comments
I have a Colgate 360 motorized toothbrush that vibrates vigorously when turned on. Inside is a tiny dc motor with relatively modest current draw. It seem like it shouldn't be hard to add this motor to MSX joypad controller internally. Joystick ...

Add S-Video to Sony HB-F1XD

by dhau on 26-08-2009, 13:34
Score: 121.59 %, Type: Forum topic , Comments: 12 comments
After I upgraded my SEGA Master System and JVC X'eye with S-Video output using this information , I got curious if I can do the same for one of my MSX computers. And after opening a couple, I found out that Sony HB-F1XD uses CXA1145 (marked as ...

Konami/Sony cartridges that are easy to disassemble

by dhau on 14-08-2008, 14:42
Score: 120.82 %, Type: Forum topic , Comments: 9 comments
Hi guys, I have a number of Padial devices as well as modified Konami SCC PCBs that I would like to house in nice cartridge cases. I don't like to use newer cases with latches, because they break so easily. Some of the older Konami games are in ...

MoonBlaster memory upgrade

by dhau on 08-07-2008, 13:26
Score: 120.69 %, Type: Forum topic , Comments: 4 comments
I have a MoonBlaster v1.0 with 512KB: 128KB Sony 521000 100ns SRAM IC on main PBC and 3x128KB ... that make my MoonSoound 2MB? Thanks! AFAIK the maximum possible in a v1.0 is 1024kb. I've got mi AFAIK the maximum possible in a v1.0 is 1024kb. I've got mine expanded by Koen from ...
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