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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: pyrre on October 21, 2018, 06:09:30 PM

Title: making own ROM's
Post by: pyrre on October 21, 2018, 06:09:30 PM: Hello.
I put this topic here since it regards making roms...

I have searched for the topic the last few days. but i cant find any real related topic. (perhaps i suck at searching....)
anyways...

I recently purchased os 3.1.4 and try to install it to my A500+ but it gives me quite a challenge. The derringer has a hardware option to store rom in fastram.
Using the - D3 drom - option makes the hardware copy rom data to ram. but i find no option to spesify rom from a file. making it (so far) impossible to put 3.1.4 rom in use on my A500+ setup. I need an actual rom replacement.

If i am correct this (https://www.aliexpress.com/item/XGECU-100-Original-Minipro-TL866ii-Plus-TL866A-TL866CS-12-Adapters-EEPROM-Universal-Bios-USB-programmer-Free/32893002325.html?spm=2114.search0104.3.23.44fe71e943L07x&ws_ab_test=searchweb0_0,searchweb201602_5_10065_10068_318_319_317_10696_450_10084_10083_10618_452_535_534_533_10307_532_204_10059_10884_323_10887_100031_320_321_322_10103_5727713_5727813_448_449,searchweb201603_1,ppcSwitch_0&algo_expid=56828914-35f2-4346-83cf-f6cc999cb8d2-3&algo_pvid=56828914-35f2-4346-83cf-f6cc999cb8d2) should be able to program a 40 pin rom chip.

But i struggle finding the actual rom chips...
This (https://www.aliexpress.com/item/Free-Shipping-M27C800-100F1-M27C800-100FI-M27C800-27C800-CDIP-42-10pcs-lot/32882411285.html?spm=2114.search0104.3.1.46341ab6l4JCcW&ws_ab_test=searchweb0_0,searchweb201602_5_10065_10068_318_319_317_10696_450_10084_10083_10618_452_535_534_533_10307_532_204_10059_10884_323_10887_100031_320_321_322_10103_5727713_5727813_448_449,searchweb201603_1,ppcSwitch_0&algo_expid=b26ac636-3028-4784-9354-a6a7a4d90dee-0&algo_pvid=b26ac636-3028-4784-9354-a6a7a4d90dee) chip has come recomended in many of the threads. But it is 42 pin....

Can anyone here put me in the right direction please?
(to a proper programmer and proper chips)

EDIT: Derringer 030 manual (http://amiga.resource.cx/manual/Derringer030.pdf)
Title: Re: making own ROM's
Post by: kolla on October 21, 2018, 06:54:55 PM: Clearly this is a case for the Hyperion support staff.
Title: Re: making own ROM's
Post by: guest11527 on October 21, 2018, 07:13:48 PM: Quote from: kolla on October 21, 2018, 06:54:55 PM
Clearly this is a case for the Hyperion support staff.
Clearly not. The distribution as it exists now uses LoadModule to load updated Os components. I do not see where anyone promised that the average "map ROM to RAM" feature multiple turbo boards provide is capable to load a new custom ROM, including its manufacturer.

These simple ROM remappers are board-specific, and are typically only able to map the currently active ROM to RAM. Anything else requires heavy hackery for which only the manufacturer could provide a solution.
Title: Re: making own ROM's
Post by: pyrre on October 21, 2018, 07:39:23 PM: Yea... no problem on the A1200 with blizzkick.....
Should work just fine. have not had time to come around and tinker with the 1200 yet.

the A500 is set up and in use quite often. and i would like to upgrade it properly :D
Title: Re: making own ROM's
Post by: kolla on October 21, 2018, 11:27:47 PM: Next we are told that noone ever promises actual ROM chips with 3.1.4 kickstart and that we all should just use LoadModule?
Title: Re: making own ROM's
Post by: smf on October 22, 2018, 07:24:13 AM: You can buy the chips and have it programmed from http://www.buyicnow.com/

Programming service costs $0.5 for each chip http://www.buyicnow.com/ser.php?i=1

Suitable eproms http://www.buyicnow.com/it.php?i=98
Title: Re: making own ROM's
Post by: kirk_m on October 22, 2018, 09:06:41 PM: AM27C400 UV EPROM, from what I recall, is what you need. I just bought 10 of them on eBay 2 weeks ago.
Title: Re: making own ROM's
Post by: pyrre on October 22, 2018, 09:30:09 PM: Do i need any special programmer, or will the linked one work?
Title: Re: making own ROM's
Post by: Louis Dias on October 22, 2018, 09:41:43 PM: Here's the one I bought a few years ago for my car tuning:

https://www.moates.net/burn2-chip-programmer-p-197.html
Title: Re: making own ROM's
Post by: Oldsmobile_Mike on October 22, 2018, 10:28:38 PM: Here is a question:

If someone started mass producing these ROM chips, charging nothing more than raw materials cost (+ a few bucks for their time), but just so that people who want them could have them, what is the likelihood Hyperion would squash them? ::)
Title: Re: making own ROM's
Post by: pyrre on October 22, 2018, 11:13:10 PM: the programmer you linked to can only write to chips with 32 pins... A500 rom chips are 40 pins
Title: Re: making own ROM's
Post by: pyrre on October 22, 2018, 11:15:05 PM: I dont think they would be happy about it....

but why not contact them and ask... maybe offer them a fee or aquire a lisence from them to do just that......
Title: Re: making own ROM's
Post by: madgrizzle on October 23, 2018, 01:03:52 PM: What's holding up Hyperion releasing the ROMs themselves?
Title: Re: making own ROM's
Post by: guest11527 on October 23, 2018, 02:40:32 PM: Lack of infrastructure. You need to order ROMs from a reliable(!) source, need to burn them and ship them.
Title: Re: making own ROM's
Post by: outlawal2 on October 23, 2018, 02:55:06 PM: Any ETA on when the ROMs and floppy sets will be available for purchase?
Title: Re: making own ROM's
Post by: Louis Dias on October 23, 2018, 02:57:02 PM: Quote from: pyrre on October 22, 2018, 11:13:10 PM
the programmer you linked to can only write to chips with 32 pins... A500 rom chips are 40 pins
Ah, yeah...good enough for my car..
I believe this one is 40 pin:
https://www.amazon.com/KNACRO-Programmer-Support-AT89C52-variety/dp/B076LGXZ2Z?keywords=chip+burner&qid=1540302800&sr=8-1&ref=sr_1_1
Title: Re: making own ROM's
Post by: kirk_m on October 23, 2018, 03:26:35 PM: You can use a TL866-II programmer for them with an adapter for those eproms sold by GGLabs.com. The TL866 doesn't support them natively, so the adapter is needed. I use a SuperPro 610p, which doesn't require an adapter, but, that's a $500 programmer.
Title: Re: making own ROM's
Post by: kirk_m on October 24, 2018, 03:07:06 AM: You can also buy one of those FLASHrom adapters from GGLabs on ebay. He will program them for you with whatever Kickstart you send him to put on it.