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What is the point of bits [3:0] in the R15 of the PSG
Score: 154.77 %,
Type: Forum topic , Comments: 9 comments
Never touched joystick circuitry too deeply. Looking into the book page 26 I can not get what is the purpose of the IOB0-IOB3 and their connection to the inputs of the port A. Somewhere else I ... IOA5/IOA6 input pins and the IOB0-3 output pins. Normally the outputs are set to 1 by the BIOS ISR to allow ...
New GR8BIT video board
Score: 154.18 %,
Type: Forum topic , Comments: 19 comments
The development took about 6 months - I had to search for information and make tough decisions (search for my posts on SE.EE and AD EngineerZone). I have learned a lot designing it, and very proud it worked properly at the first start. The board can ...
Mapped RAM I/O port read enable strategy
Score: 153.54 %,
Type: Forum topic , Comments: 17 comments
and responds with D2..D0 to the page number reads (Yamaha violating standard?). All other bits D7..D3 ... I can safely identify the size of mapper (3 bits) by writing 0 into the port, and happily use D7..D3 ... when reading previously written values having 0 in D5.
I am interested hearing your thoughts ...
New composite/S-video encoder for MSX
Score: 152.09 %,
Type: Forum topic , Comments: 9 comments
0.741 Vpp. V99xx outputs signals max of 1 Vpp. While AD725 can cope with level above spec, I would say ... think it must be remarkable that color 4 (pure blue) in screen 0 is having small green and red ... COLOR=(4,0,0,7) to get a pure blue.
Bad thing that I am ashamed, Bad thing that I am ashamed, good thing ...
TCP/IP UNAPI standard discrepancy - what to do?
Score: 151.63 %,
Type: Forum topic , Comments: 3 comments
I have several ways to go:
use Nestor's API 1.0;
fork new API 1.1 with corrected register input (and some other changes like references to IP addresses 0.0.0.0 and configuration logic). ...
Pletter issues
Score: 148.92 %,
Type: Forum topic , Comments: 2 comments
Some time ago I was advised to use Pletter for packing data for MSX . The package is having packer for Windows and unpacker for MSX.
I implemented unpacker and found out that unpacked data differs with original one: King's Valley 2 ...
Hot unplug: how to properly perform COLD boot of Turbo machine?
Score: 148.21 %,
Type: Forum topic , Comments: 0 comments
Issue: after reconfiguration GR8NET jumps to the address 0. Before reconfiguration GR8NET had ... to the address 0, machine sees that it is warm boot, and skips many initialization steps, including ... (e.g. @ 04D0), machine jumps to slot's address not having Nextor any more, and fails.
Question: ...
Please try [GR8NET] + [MFR SCC+ SD] in Panasonic FS-A1WSX
Score: 147.8 %,
Type: Forum topic , Comments: 6 comments
I have a report from the owner of the all three devices that they do not work when all are being employed.
When GR8NET and MFR are inserted into the machine, machine behaves weirdly restarting and rebooting, but sometimes works properly after ...
PLATOTerm for MSX? What is it?
Score: 147.27 %,
Type: Forum topic , Comments: 2 comments
Yesterday I came across a posting on the Facebook, with someone calling himself IRATA.ONLINE (Thomas Cherryhomes) trying to propose his "service for retro-computer owners".
Here're related links (should be available as post is ...
How to properly detect MSX-DOS version?
Score: 154.14 %,
Type: Forum topic , Comments: 16 comments
"RETURN VERSION NUMBER (0CH)" seems gives the wrong information.
Try with Try with DISKVE. ... wrote:
BDOS's "RETURN VERSION NUMBER (0CH)" seems gives the wrong information. ... compatibility with MSX-DOS 1.0, the following procedure should always be followed in using this function. ...
