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ack
10 Year Member
Fio's Quartermaster
·
From
Seattle, WA
Joined
Apr 9, 2009
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Today at 10:25 AM
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ack
replied to the thread
mv1a not saving
.
There are 2 ways to get the pulse from the 4990 IC. IRQ and polling a register. The test is doing both and comparing the results. The...
Tuesday at 7:01 PM
ack
reacted to
Misos's post
in the thread
mv1a not saving
with
Like
.
Hello. I had a similar problem with a mv1b and here is what I did: -Unibios settings would not save after power off -Used the diag bios...
Jan 30, 2023
ack
replied to the thread
MV1A not playing specific games
.
I would bet its going to be an issue with the NEO-BUF to the right of the NEO-I0. It might be having issues or if your board was from...
Jan 25, 2023
ack
reacted to
JLL's post
in the thread
Need help with two CMVS MV1C boards
with
Like
.
It was absolutely invisible to the naked eye (and thanks a million to my Pixel 7 phone with a 8x digital zoom) but I could see there was...
Jan 21, 2023
ack
reacted to
mifn21's post
in the thread
MV-1FS Not booting / gfx corruption
with
Like
.
It was the BIOS chip luckily - swapped it for a known good one and the board works fine now
Jan 21, 2023
ack
replied to the thread
Neo Diagnostics ROMs
.
I would check that connectivity between the Z80 and YM2610 as well as the clock going into the YM2610...
Jan 8, 2023
ack
reacted to
maki's post
in the thread
MV2F second slot not working
with
Like
.
Hi all :) I have this MV2F here, where only the first slot works. slot 1 has Bust a Move/Puzzle Bobble, slot has MS2, from what I've...
Dec 18, 2022
ack
replied to the thread
Audio Issue With MVS MV4 Sound Crackle In 4 Slot
.
I would definitely do the cap replacement first. I misread your title/first post thinking the issue was only on slot 4.
Dec 15, 2022
ack
replied to the thread
Audio Issue With MVS MV4 Sound Crackle In 4 Slot
.
These are my notes for slot4 on MV4 boards. This gets you info from the slot to the first logic chip. PROG (CTRG8) 01A <=> GND 02A...
Dec 15, 2022
ack
replied to the thread
mv1a not saving
.
whats the model number on the chips?
Dec 6, 2022
ack
replied to the thread
mv1a not saving
.
I would try the diag bios and see if it finds anything. Backup ram is read-only by default and requires some logic for it to become...
Dec 5, 2022
ack
replied to the thread
Neo MVH MV4F repair - battery damage, garbage overlaid on screen
.
I will usually use a sharp/skinny pair of tweezers and test each leg by applying a small amount of side pressure to verify the leg is...
Nov 27, 2022
ack
reacted to
hatmoose's post
in the thread
Neo MVH MV4F repair - battery damage, garbage overlaid on screen
with
Like
.
And then I remembered the old "push hard on the chip" trick. After a few minutes of poking at the NEO-IO in various ways it started...
Nov 27, 2022
ack
replied to the thread
Neo MVH MV4F repair - battery damage, garbage overlaid on screen
.
sounds reasonable to me.
Nov 26, 2022
ack
replied to the thread
NEO-MVH MV1FS Battery Replacement?
.
I'm pretty sure the spacing between the + and - through holes for the battery is 20mm, which is the standard distance you will find on...
Nov 21, 2022
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