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Fast addition on a list of values

by Metalion on 14-01-2021, 20:00
Score: 160.67 %, Type: Forum topic , Comments: 5 comments
it readable for now). LD A,(RANGE_START + 0) LD (DATA2 + 1),A LD ... + 0) LD (DATA1 + 1),A LD A,(RANGE_END + 1) LD C,A ; ... ; D = 0 (Note: if CONSTANT were 16 bit, the algorithm would still work). LOOP: ; Add ...

NX parameter for HMMV

by Metalion on 23-01-2021, 14:52
Score: 160.83 %, Type: Forum topic , Comments: 2 comments
Hi everyone, I have seen (on emulator at least) that when launching an HMMV command, if you are reaching for the right edge of the screen, the value of the NX parameter does not need to be exact. For example, if you want to make a rectangle ...

Cheap CX5M

by Metalion on 21-01-2021, 17:39
Score: 160.82 %, Type: Forum topic , Comments: 16 comments
matter unless you plan to use Yamaha’s software with MIDI. The MBIOS 2.0 ROM is the biggest difference. ... an SFG-01 or 05 doesn’t really matter unless you plan to use Yamaha’s software with MIDI. The MBIOS 2.0 ROM ...

DOS2 not booting

by Metalion on 31-01-2021, 10:48
Score: 161.07 %, Type: Forum topic , Comments: 4 comments
I'm not very familiar with DOS, but as I'm trying to make VGM work, I need the DOS2 to boot. And I cannot succed in doing so ... Very very frustrating I've downloaded the DOS2.40 here Made a DSK image and tried it on ...

OpenMSX: Not enough free cartridge slots

by Metalion on 31-01-2021, 14:45
Score: 161.13 %, Type: Forum topic , Comments: 8 comments
Hello, I'm trying to start a configuration on OpenMSX with: - an MSX computer with 2 slots - a MegaFlashRom SCC+ SD - an SFG-01/05 extension But whatever the one I choose, I always get a " Not enough free cartridge slots " ...

SCREEN2 not correctly displaying the 3 banks

by Metalion on 09-02-2021, 10:34
Score: 161.2 %, Type: Forum topic , Comments: 1 comment
hl,test_0 ld de,VRAM.screen ld bc,768 call BIOS.ldirvm ret Result : only the first bank ...

How do you keep a build number ?

by Metalion on 27-02-2021, 13:55
Score: 161.71 %, Type: Forum topic , Comments: 2 comments
way to do it, using the 'update' instruction: module VERSION major=0 minor=0 ... "0"+build/1000,"0"+(build mod 1000)/100 byte "0"+(build mod 100)/10,"0"+(build mod 10) endmodule ...

MG2 VDP frequency

by Metalion on 03-03-2021, 10:31
Score: 161.81 %, Type: Forum topic , Comments: 13 comments
of the code: if (sync == VDP_SYNC_AUTO) { vdp->palMask = ~0; vdp->palValue = 0; } else if (sync == VDP_SYNC_50HZ) { vdp->palMask = ~0x02; vdp->palValue = 0x02; } else if (sync == VDP_SYNC_60HZ) { vdp->palMask = ~0 ...

Set sprite size through BIOS ?

by Metalion on 08-03-2021, 17:24
Score: 162.09 %, Type: Forum topic , Comments: 4 comments
; VDP: screen 2 call INIGRP ; screen ,2 call DISSCR ld hl, RG1SAV ; (RG1SAV: equ $f3e0 ; Content of VDP(1) register (R#1)) set 1, [hl] ; (first call to ENASCR will actually apply to the VDP) ; screen ,,0 ... instruction is actually doing ( https://github.com/apoloval/msx-system/blob/master/base/1.0/... ): ...

Is it possible to reproduce low-pass filter on PSG ?

by Metalion on 07-03-2021, 11:51
Score: 161.99 %, Type: Forum topic , Comments: 16 comments
results. If you want to lower the volume a bit, enable the tone generator and set it to period 0 or 1, ... it to period 0 or 1, the inaudibly quick oscillation of the tone generator will halve the amplitude. ... fake lowpass filter https://www.dropbox.com/s/q7cvc8ze7nsl6xm/PSG%20fake%20lowpass%20filter.mp3?dl=0 ...
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