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AuthorTopic: A4000 motherboard-getting there  (Read 3810 times)

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Offline gary2000

Re: A4000 motherboard-getting there
« Reply #15 on: January 16, 2020, 09:32:04 PM »
I have nothing against 3.1.4, I only wanted 3.1 to test with. (Have enough unknown variables to deal with).
 

Offline gary2000

Re: A4000 motherboard-getting there
« Reply #16 on: February 03, 2020, 12:01:04 AM »
The only issue I had with running diagrom was a vertical hold problem rolling screen.

Could someone tell me the in-circuit value of R514, which shows 10K? Mine is 3K or 4.5K without resistor, and this does not seem normal.
 

Offline gary2000

Re: A4000 motherboard-getting there
« Reply #17 on: February 16, 2020, 01:07:35 AM »
Well, it finally booted to Kick start screen!

The Commodore roms went bad, which was surprising.

One issue other than the occasional yellow screen, is when you put in a disk OVL is held high. You must turn off and turn on again for the high to low to happen. Has anyone seen this happen?

Most games will not fully load and there is graphical corruption when trying, but work bench will load fine.
 

Offline gary2000

Re: A4000 motherboard-getting there
« Reply #18 on: March 19, 2020, 11:35:08 PM »
Mostly working at this point, but I have the following issues:   

When selecting from Gotek, you have to manually turn off the power and turn on to reboot instead of warm restart.

Fast RAM 4MB shows as 1 - I believe this has to do with the power supply _fail + 5 V as shown in other posts.

Only Gotek works as DF0 and original floppy is unstable and does not load much. All jumpers were set correctly.

Sysinfo reports and ECS Agnus instead of Alice AGA. It also shows 25 mhz as 030, even though it is an 040.  It sometimes reports as 16 mhz, also using Sysinfo 4.3.

Some games work perfectly and some crash. Workbench loads ok.  Any ideas on these issues?
 

Offline kolla

Re: A4000 motherboard-getting there
« Reply #19 on: March 20, 2020, 08:57:47 AM »
Sysinfo reports and ECS Agnus instead of Alice AGA. It also shows 25 mhz as 030, even though it is an 040.

Sounds like you're missing SetPatch in Startup-Sequence - it is SetPatch that enables AGA and loads 68040.library.

You say Workbench loads OK, but if you go to Prefs/Screenmode, I suspect it also doesn't let you pick 256 colour modes.
« Last Edit: March 20, 2020, 08:58:51 AM by kolla »
B5D6A1D019D5D45BCC56F4782AC220D8B3E2A6CC
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A3000/060CSPPC+CVPPC/128MB + 256MB BigRAM/Deneb USB
A4000/CS060/Mediator4000Di/Voodoo5/128MB
A1200/Blz1260/IndyAGA/192MB
A1200/Blz1260/64MB
A1200/Blz1230III/32MB
A1200/ACA1221
A600/V600v2/Subway USB
A600/Apollo630/32MB
CD32/SX32/32MB/Plipbox
CD32/TF328
A500/V500v2
A500/MTec520
CDTV
MiSTer, MiST, FleaFPGAs and original Minimig
Peg1, SAM460 and Mac minis with MorphOS
 

Offline gary2000

Re: A4000 motherboard-getting there
« Reply #20 on: March 21, 2020, 02:25:54 AM »
Ok, thanks. I will check into that.
 

Offline gary2000

Re: A4000 motherboard-getting there
« Reply #21 on: March 22, 2020, 11:55:51 PM »
Ended up installing bestWB.  Showconfig looked ok / 256 colors working.

Sysinfo still showing ECS Agnus - 2 / 68040 16.60 with IDE drive attached and 25.60 with no hard drive.

Checked and replaced gals for IDE, no difference. I wonder if the MMULIB is the one included in bestWB. In startup-sequence it says CPU checkinstall. Hopefully this is just a configuration issue.