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Retro DIY MSX goodness update

by lintweaker on 18-11-2018, 14:53
Score: 156.47 %, Type: Forum topic , Comments: 3 comments
My DIY MSX(2+) is coming along quite nicely. Last missing item is audio and joystick ports, PCB for it is under development... The cartridge in the back slot is a MSX GOUDA SCSI interface with Novasix Flash BIOS (never made it to production). ...

Z280 to Z80 adapter revisit

by lintweaker on 16-11-2018, 13:34
Score: 158.84 %, Type: Forum topic , Comments: 85 comments
some text in screen 0 width 80. Now I am playing again with a Z280, this time in combination with my ... of the z280 is seen with the Dhrystone 1.0. really interesting what this CPU performs. Quote: While I'm going to have my own run, I found results from Stefan Nitschke, who ran dhrystone 1.0 ...

MEGASCSI partitioning?

by lintweaker on 09-11-2018, 21:11
Score: 156.44 %, Type: Forum topic , Comments: 7 comments
((ENTER & Cursor UP or DOWN ENTER) - N DRIVES How many drives ? (0-8) - Fill 2 in - S SETUP Are ...

Tokyo 2018, still some MSX

by lintweaker on 28-09-2018, 11:57
Score: 155.75 %, Type: Forum topic , Comments: 11 comments
Just got back from a trip to Japan. Of course we went to see some (retro) stores in Tokyo to see what MSX stuff was still for sale. The BEEP shop was my favourite, in a basement full of old nice stuff with a few nice MSX items. A few pics: ...

Carnivore2 PSG write only?

by lintweaker on 27-08-2018, 20:05
Score: 155.16 %, Type: Forum topic , Comments: 8 comments
to run it as a mirror without conflict on IN instructions but it is on 0x10 on the ports list then how to detect such PSG port 0x10? Who/what can use port 0x10? Who/what can use it then? There is no reference in the Carnivore2 docs about it I read about port 0x10 on the I read about port 0 ...

gfx9k lib howto?

by lintweaker on 14-08-2018, 20:53
Score: 154.97 %, Type: Forum topic , Comments: 7 comments
I tried using gfx9k lib (0.70) to (get a head) start programming my V9990. It needs ... SjASM Z80 Assembler v0.39g1 - <a href="http://www.xl2s.tk" title="www.xl2s.tk">www.xl2s.tk</a> Pass 1 complete (0 errors) g9klib.inc line 8: Label not found: G9k.Reset g9klib.inc line 8: Label ...

VDP wait examples?

by lintweaker on 26-07-2018, 16:50
Score: 154.66 %, Type: Forum topic , Comments: 13 comments
It seems my DIY MSX2+ is in need of a hw VDP wait mechanism. In screen 0 en 1 I see now letter appearing twice or the wrong ones. For graphical screens I have not (yet) seen any corruption issues. ... the BIOS was so tightly timed. Then again screen 0 is very timing sensitive on the V99x8, more so than ...

DIY MSX(2+) keyboard issues, help needed

by lintweaker on 18-07-2018, 17:23
Score: 157.13 %, Type: Forum topic , Comments: 12 comments
the trouble keys belong to row 0. As background: a interrupt is generated to the microcontroller whenever there is a read to IO port 0a9h from the MSX. The microcontroller then reads the current selected keyboard column from the MSX 8255 portC (PC0-3) and returns a 8-bit value to the MSX via 8255 PortB ...

YM2149/PSG line level output?

by lintweaker on 01-07-2018, 17:30
Score: 154.54 %, Type: Forum topic , Comments: 5 comments
Hi, I am in the process of building a DIY MSX. Next on the list is adding the PSG for sound and joystick support. Do a need additional amplification to get line level sound output? If so, any recommendations of op-amps to use? The system currently ...

MSX 50pin catridge slot connector

by lintweaker on 16-03-2018, 10:19
Score: 152.86 %, Type: Forum topic , Comments: 5 comments
Does anyone know a source and or part numbers for MSX (compatible) 50 pin catridge slot connector to use on a PCB? Thanks Those worked for Those worked for me: https://www.ebay.com/itm/5pc-Industrial-Card-Edge-Slot-Socke... I ...
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