Ms. PACMAN main PCB edit Help 6F rom

Mastecutor

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Hello, new to group. This is the main board from this unit. Not sure if it original, but it has been modified as there is no Aux board. I replaced all caps. Took voltage measurements and all checked out. +5VDC,+7.5VDC, and +16VDC.
IMG_9796.jpeg

The edits are as follows:

1) Trace is cut from 6P Pin 20 to (7N Pin 4)

2) Trace is cut from 6N Pin 20 to (7N Pin 3)

3) Trace cut from 7N Pin 13 to 6D Pin 16

4) Pin 10 from 7L lifted going to Pin 18 of Row 6x

5) Pin 1 of 7F is lifted. *

6) wire jumper from 6B Pin 5 to 7N Pin 13.

7) Wire jumper from 6P Pin 20 to 7N Pin 5.

8) Wire jumper from 6N Pin 20 to 7N Pin 6.

9) Pin 9 and 10 of 7L is jumpered this goes to 6K Pin 18.

There is no Aux board and the z80 has been placed on main pcb.

All 6 ROMs on Row 6 are 2532's-24 pin
7N - SN74LS42N -16 pin Motorola
7L-SN74LS02N-14 pin. Tex Instruments
7F-S320-07AXN-AXHD Midway

ROMs 5E and 5F appear to be orig Ms PACMAN Roms as they are labelled as such.

It boots and it is programmed for Fast play
All of the modifications appear to be as published. Other than the 2x 24 pin socket savers were placed at 6P and 6N instead of 6K and 6M and

I am Not sure why Pin 1 of 7F is lifted?
(It appears 7F filters the blue , green and red. Pin 1 lifted effects the red.)

I would like to convert this to normal speed play. I do not have a Rom programmer or Eraser.

With the edits above what needs to be done to accomplish normal speed play? I tried a 6F normal speed play ROM . This did not work

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With the 6F "Normal Speed" ROM from arcade parts and repair . This is the random output on the screen. When i switch to test mode the screen goes blank.

It's a mashup of a single ghost. In test mode screen is blank. aka Garbage.

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Misc
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Is the 6F normal speed rom possibly not outputting good data because this mod used positions 6N and 6P for ROMs 5 and 6?

In the published mod(see attached ) the two new 24 pin ROMs were placed in 6K and 6M (not 6N and 6P) I wouldn't think this was the issue. I wanted to reach out to see if someone is familiar with this modification.

It seems with this mod board the 6F normal speed chip is a no go with the mod burned ROMs. Im going to take a wild guess that these
8 ROMs have been burned with the Mowerman data set. I'll Burn a normal speed 6F ROM from Mowerman data set and see what it gives me. :mspacman:
 
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Did you buy a Fast 6F specifically for your bootleg ROM set or the genuine ROM set?

I am actually not sure which dataset was used on the ROMs. But it is clear that the 6F ROM that arcade parts and repair supplied is not what i need with this board mod. On the bright side I have another 2532 ROM i can erase and reprogram .

Im fine with this ms pacman board not having auxiliary card and mod. I just want the normal speed 6F ROM image that works with these other ROM images(6E,6H,6J,6N,6P,5E,5F)

Im either going to have to get all 8 programmed that fit with this mod or i may just get lucky and only have to program 6F.

IMG_9838.jpeg

The mod correlates to images above except on this board 24 pin 6N and 6P were populated instead of 6KL and 6M.

As well as the following:

1) Trace is cut from 6P Pin 20 to (7N Pin 4)

2) Trace is cut from 6N Pin 20 to (7N Pin 3)

The published edit by lawnmower man has 6KL and 6M pin 20 cut to 7N Pin 2 and Pin 1.
 
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The bootleg romset your board uses is more than likely "mspacmab.zip" from Mame. You're gonna wanna download this zip folder and get the "boot2" file burned to a 2532 that goes in place of where the chip labeled "2" currently is on your board. The "2" chip is equivalent to the 6F but you need the bootleg romset specifically.
 
I am actually not sure which dataset was used on the ROMs. But it is clear that the 6F ROM that arcade parts and repair supplied is not what i need with this board mod. On the bright side I have another 2532 ROM i can erase and reprogram .

Im fine with this ms pacman board not having auxiliary card and mod. I just want the normal speed 6F ROM image that works with these other ROM images(6E,6H,6J,6N,6P,5E,5F)

Im either going to have to get all 8 programmed that fit with this mod or i may just get lucky and only have to program 6F.

The row 5 gfx roms aren't going to be a problem

Get a CRC to ident your old 6F boot and see which set it matches.
 
GQ-4x4 programmer and Eprom eraser arrived. The hack/mod version of the 6F chip gor normal speed i was able to write and verify on a HN462532G Eprom. Tested it out and was a success.

Attempting TMS2532AJL(21V) or TMS2532JL(25V)
Was unsuccessful. It would write but not Verify ?


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Is there a trick to programming the TI rom's? I am using a 9V supplemental supply.
 
IIRC Texas Instrument EPROMS are troublesome in general. The reason being is that TI released their 2532 chip and then revised it, but didn't change the model number (or something along those lines). So YMMV with the batch of TI EPROMS you get. In my experience with the GQ-4X4, some work, some don't. I stay away from them because of this. Hitachi EPROMS (HN2532) on the other hand, work every time.

Edit: @steph explains it well here: https://forums.arcade-museum.com/threads/tms-2532jl-vs-2732.487905/post-4312024

Del
 
GQ-4x4 programmer and Eprom eraser arrived. The hack/mod version of the 6F chip gor normal speed i was able to write and verify on a HN462532G Eprom. Tested it out and was a success.

Attempting TMS2532AJL(21V) or TMS2532JL(25V)
Was unsuccessful. It would write but not Verify ?


View attachment 810129

Is there a trick to programming the TI rom's? I am using a 9V supplemental supply.

top right corner say READ ONLY for the device you chose.
 
top right corner say READ ONLY for the device you chose.
Fair observation. But there are numerous posts stating the read only version easily writes and verifies the TMS2532A's.

There is really no post in MoG's that states Clearly how the GQ-4x4 EpRom programmer handle's the TI 2532AJL's or 2532JL's. Its mostly complaints about how the GQ4x4 cant program along with a few vague success stories.

I was hoping to hear from a few of the long time members who have had no issues programming these TI EPROMs with the GQ-4x4 and the exact steps taken to achieve this greatness.
 
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I outgrew my 4x4 quickly due to some of these weird issues and went with something more beefy but it is a great programmer for lots of other stuff and you can't beat the price.
 
I don't have specifics for you, but slowing down the speed setting, double writing, and/or choosing another 2732 manufacturer are all things I've tried and sometimes gotten success.

You mentioned it, but definitely be sure to have the 9v adapter plugged in.
 
Ive slowed speed to -2. Also double write. If i remove verify it finishes writing process with success. When i manually press verify it fails the verification process.


I may try pulling the vpp pin to force voltage.

Most posts i have read, fail the write process. Where mine is failing during verification. Unless i misread something.
 
Most posts i have read, fail the write process. Where mine is failing during verification. Unless i misread something.
If you are failing during verification that means you have a failed burn (write)

It finishes writing something but when verified against buffer it fails which means it burned incorrectly.
 
Also, worth mentioning, upgrading your eraser makes a HUGE difference. You can erase an EPROM in a few minutes, versus the generic blue ones you see out there. When troubleshooting and writing roms it helps to A) Have a quality eraser to make sure it gets erased properly and B) Gets it done fast so you can try again.

I had the cheap blue one for years and when I found an OG used one on eBay I never looked back!

Here's an example: Spectraline UV eraser

Del
 
you know what's weird about 2532As is I spent years not being able to program them with GQ-4X and now I reached into the stash of those roms at work and I can just program them easily now. that's with the READ ONLY device also. I have no rational explanation for it.

we have 2732As also, those programmed fine too
 
I moved the software tor GQ-4x4 to a desk top with 3.0 USB ports vs the 2.0 ports on my laptop.

Im still using a 9V external supply.

I'm 10/10 on the TI 2532JLs!!!!! :bigok:

On laptop with 2.0 ports i was 0/10 with the

TI TMS2532JL's It would say it wrote successfully but then fail verification process….Liar!

So at this time running on Desktop with Windows 10 on 3.0 usb ports. With a 60 min UV erase time I'm 100% on the Tex. Instruments 2532JLs.

Next batch Im going to halve the erase time.

Misc.
With Hitachi HN462532's: these write and verify on both setups. These don't appear as sensitive to USB (2.0 or 3.0) connection and or they are more receptive to the uv erase process.

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I set speed to -2 setting. Writing twice didn't seem to make a difference. I only wrote once but if twice feels good then go with it. I then verified .

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Erase time i let it easy bake for 60 minutes. I think buying a better UV eraser may be a good suggestion . The little Blue door POS works , but may require more easy bake sessions.

I need to re~evaluate the TI TMS2532A's and the Motorola MCM2532s. I definitely will be looking at the READ ONLY device setting for the TI 2532A's.

Has anyone validated the VPP voltage on the Read only TMS2532A program? I was seeing 22V on dvm during the TMS2532JL program. I suspect it was averaging it. I may have to put DC coupled probe and check on O-scope.
 
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