A590, EEPROM instead of EPROM, possible?

DanC · 14 April 2021, 09:47

Hi!

I have a A590 HD with ver 6.0 i think.
Now i want to upgrade it to ver 7.0.

Can i use EEPROM for this, will a AT28C64B15 work?
Or must i use a EPROM like 27C64 for it to work?

/dan

Vypr · 14 April 2021, 10:27

AT28C64B15 looks like it is pin compatible so it should work, otherwise yu can use 27C128 or 27C256 if you can't find any 27c64

DanC · 14 April 2021, 12:46

Quote:

Originally Posted by Vypr

AT28C64B15 looks like it is pin compatible so it should work, otherwise yu can use 27C128 or 27C256 if you can't find any 27c64

Thanks for the info!

So there is no general issues of using EEPROM instead of EPROM in a
A590 then?

And the speed of the chip, will 150ns do?

/dan

Jope · 14 April 2021, 13:36

150ns is ok.

amiman99 · 14 April 2021, 16:24

Let me tell you my experience,
As a test, I have A2091 SCSI controller connected to A500 (v2.1 Sys ROM) using Zorro adapter, with v6.6 roms.
I'm using SST 27sf256 EEPROMs. The ROMs for A570 and A2091 are the same, so I tried to burn the new v7 ROMs to the chips by filing them in 8k increments.
The A500 would not autoboot, and if I turn off autoboot, the HDToolbox would not see the HD.

I burned v6.6 ROMS same way, and they worked fine. So, at least I know the bigger EEPROMs work.

I don't know if the problems with v7 is the System v2.1 ROMs, or the card, or the adapter, or just bad ROM dumps.

Let us know how it goes. I will try it on my A2000, and see if it works on it.

DanC · 14 April 2021, 19:01

Quote:

Originally Posted by Jope

150ns is ok.

Nice, i think i will try with the EEPROM then, easier, as i dont have an
EPROM eraser.

DanC · 14 April 2021, 19:04

Quote:

Originally Posted by amiman99

I burned v6.6 ROMS same way, and they worked fine. So, at least I know the bigger EEPROMs work.

Great info, so you have burned and used EEPROM and get it to work,
at least with v.6.6.
I will try v7.0 with the AT28C64B15 EEPROM then.

amiman99 · 14 April 2021, 19:11

Quote:

Originally Posted by DanC

Great info, so you have burned and used EEPROM and get it to work,
at least with v.6.6.
I will try v7.0 with the AT28C64B15 EEPROM then.

It worked with v6.6, no boot with v7.
I did order 8k EEPROMs from China, so I will try it and see if it works with that.

I want v7 so I can use bigger HDs.

DanC · 14 April 2021, 19:48

Quote:

Originally Posted by amiman99

I want v7 so I can use bigger HDs.

Me to! I want 7.0, so i will order some AT28C64B15 and try, they are pretty cheap.
I report here if it works or not.

/dan

RoC · 14 April 2021, 21:52

Good to know the EEPROM could work too

Out of curiosity, which is the programmer you have been using?

Is TL866II capable of that? For the 27C400, I normally use that with the adapter

LIV2 · 14 April 2021, 22:50

I'm using AT28C64B's with my A590 and A2091 so I can confirm they work just fine programmed with the TL866II

RoC · 15 April 2021, 07:25

Thanks, good to know ;-)

DanC · 24 April 2021, 06:27

So, now i have got my AT28C64B15's and burned the v7.0 images in them.
Worked very well, and the A590 boots up in my A500 just fine.

How do you check what version the A590 have in Amiga OS, from cli or WB ?

Jope · 24 April 2021, 10:27

version scsi.device

DanC · 25 April 2021, 20:21

Quote:

Originally Posted by Jope

version scsi.device

OK, tnks, version scsi.device reports 37.64
Is that what to be expected from A590 with v7.0 ?

/dan

Jope · 26 April 2021, 16:46

Quote:

Originally Posted by DanC

OK, tnks, version scsi.device reports 37.64
Is that what to be expected from A590 with v7.0 ?

I got the same result when I just tried it in an emulator.

amiman99 · 26 April 2021, 21:49

Quote:

Originally Posted by DanC

So, now i have got my AT28C64B15's and burned the v7.0 images in them.
Worked very well, and the A590 boots up in my A500 just fine.

How do you check what version the A590 have in Amiga OS, from cli or WB ?

I'm still waiting for my eeproms from China.

amiman99 · 01 May 2021, 04:19

I got my eeproms.
Got it working. Apparently the HD I was testing with did not like v7 ROMs for some reason. I have a 9GB one and this one works fine.

DanC · 02 May 2021, 06:48

Quote:

Originally Posted by Jope

I got the same result when I just tried it in an emulator.

OK, great, tnks for checking!

DanC · 02 May 2021, 06:50

Quote:

Originally Posted by amiman99

I got my eeproms.
Got it working. Apparently the HD I was testing with did not like v7 ROMs for some reason. I have a 9GB one and this one works fine.

Great! if you run "version scsi.device" in cli, what version reports it?

14 April 2021, 09:47	#1
DanC Registered User Join Date: Jul 2020 Location: Växjö / Sweden Posts: 58	A590, EEPROM instead of EPROM, possible? Hi! I have a A590 HD with ver 6.0 i think. Now i want to upgrade it to ver 7.0. Can i use EEPROM for this, will a AT28C64B15 work? Or must i use a EPROM like 27C64 for it to work? /dan

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14 April 2021, 10:27	#2
Vypr Registered User Join Date: Dec 2016 Location: East Kilbride, Scotland Posts: 451	AT28C64B15 looks like it is pin compatible so it should work, otherwise yu can use 27C128 or 27C256 if you can't find any 27c64

14 April 2021, 13:36	#4
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	150ns is ok.

14 April 2021, 16:24	#5
amiman99 Registered User Join Date: Sep 2009 Location: San Antonio, TX USA Age: 50 Posts: 1,184	Let me tell you my experience, As a test, I have A2091 SCSI controller connected to A500 (v2.1 Sys ROM) using Zorro adapter, with v6.6 roms. I'm using SST 27sf256 EEPROMs. The ROMs for A570 and A2091 are the same, so I tried to burn the new v7 ROMs to the chips by filing them in 8k increments. The A500 would not autoboot, and if I turn off autoboot, the HDToolbox would not see the HD. I burned v6.6 ROMS same way, and they worked fine. So, at least I know the bigger EEPROMs work. I don't know if the problems with v7 is the System v2.1 ROMs, or the card, or the adapter, or just bad ROM dumps. Let us know how it goes. I will try it on my A2000, and see if it works on it.

14 April 2021, 21:52	#10
RoC Registered User Join Date: May 2011 Location: Italy Posts: 214	Good to know the EEPROM could work too Out of curiosity, which is the programmer you have been using? Is TL866II capable of that? For the 27C400, I normally use that with the adapter

14 April 2021, 22:50	#11
LIV2 Tinkerer Join Date: Jan 2020 Location: Sweden Posts: 103	I'm using AT28C64B's with my A590 and A2091 so I can confirm they work just fine programmed with the TL866II

15 April 2021, 07:25	#12
RoC Registered User Join Date: May 2011 Location: Italy Posts: 214	Thanks, good to know ;-)

24 April 2021, 06:27	#13
DanC Registered User Join Date: Jul 2020 Location: Växjö / Sweden Posts: 58	So, now i have got my AT28C64B15's and burned the v7.0 images in them. Worked very well, and the A590 boots up in my A500 just fine. How do you check what version the A590 have in Amiga OS, from cli or WB ?

24 April 2021, 10:27	#14
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	version scsi.device

01 May 2021, 04:19	#18
amiman99 Registered User Join Date: Sep 2009 Location: San Antonio, TX USA Age: 50 Posts: 1,184	I got my eeproms. Got it working. Apparently the HD I was testing with did not like v7 ROMs for some reason. I have a 9GB one and this one works fine.

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