carlsson
Veteran Member
Yay, another PET thread! ;-)
In this thread, I will summarize the results of checking both Stèphane's and Alex' ROM sets. Both sent me two sets of ROMs:
* Stèphane sent me the Basic V2 ROMs (FR) that were present on the motherboard I sold him + Dave's 2532 EPROM's with Basic V2 (DME) sent before the original motherboard was replaced. I believe Stèphane might've had another set of V2 or V4 ROMs on his original motherboard, but those were not included.
* Alex sent me the Basic V2 ROM + EPROMs (AC, ACE) that were present on the motherboard I sold him + his old Basic V4 ROMs (IT) on the original motherboard.
I am using the Windows XP command fc /b to compare dumped ROMs with downloaded known good BIN files.
Stèphane
901465-01 FR = OK ($C000, Basic V2)
901465-01 DME = OK (2532)
901465-02 FR = OK ($D000, Basic V2)
901465-02 DME = OK (2532)
901465-03 FR = OK ($F000, Kernal V2)
901465-03 DME = OK (2532)
901447-24 FR = Blank?! ($E000, Editor V2 Graphics keyboard, no CRTC)
901447-24 DME = OK (2532, but only first 2K read)
I remember Stèphane's PET has the Business keyboard, so I probably need to program a 2716 with 901474-01.
I'll probably re-dump the 901447-24 ROM that was on the motherboard I sent to France and now has returned to me. It worked earlier this year and as all the other chips have survived two flights, it seems unfortunate if that one got wiped.
Alex
901465-01 AC = OK ($C000, Basic V2)
901465-02 AC = OK ($D000, Basic V2)
901465-03 ACE = Faulty ($F000, Kernal V2) (2532)
901447-24 ACE = OK ($E000, Editor V2 Graphics keyboard, no CRTC) (2716)
901447-14 AC = OK (Swedish character generator)
Again, I should try to redump the 901465-03 EPROM as it looks to be partly correct.
Here comes the most important part, checking Alex' original ROM set to figure out if he had a ROM problem or other motherboard fault which required him to get a new one:
901465-20 IT = OK ($C000, Basic V4)
901465-21 IT = Faulty ($D000, Basic V4)
901465-22 IT = Faulty ($F000, Kernal V4)
901465-23 IT = OK ($B000, Basic V4)
901447-29 IT = OK ($E000, Editor V4 Graphics keyboard, no CRTC)
901447-10 IT = OK (Character generator for both V2 and V4)
After closer inspection, bit 4 (00010000) is stuck on the 901465-21. The 901465-22 is partly good and partly bad. Again it could be worth taking another dump.
It means if Alex wants Basic V4 on his machine, I should burn him two 2532 to replace the bad ROMs. If he wants V2, I could include the 2532 already burned by Dave.
Any questions? Just let me know if anyone wants to see the dumps for themselves.
In this thread, I will summarize the results of checking both Stèphane's and Alex' ROM sets. Both sent me two sets of ROMs:
* Stèphane sent me the Basic V2 ROMs (FR) that were present on the motherboard I sold him + Dave's 2532 EPROM's with Basic V2 (DME) sent before the original motherboard was replaced. I believe Stèphane might've had another set of V2 or V4 ROMs on his original motherboard, but those were not included.
* Alex sent me the Basic V2 ROM + EPROMs (AC, ACE) that were present on the motherboard I sold him + his old Basic V4 ROMs (IT) on the original motherboard.
I am using the Windows XP command fc /b to compare dumped ROMs with downloaded known good BIN files.
Stèphane
901465-01 FR = OK ($C000, Basic V2)
901465-01 DME = OK (2532)
901465-02 FR = OK ($D000, Basic V2)
901465-02 DME = OK (2532)
901465-03 FR = OK ($F000, Kernal V2)
901465-03 DME = OK (2532)
901447-24 FR = Blank?! ($E000, Editor V2 Graphics keyboard, no CRTC)
901447-24 DME = OK (2532, but only first 2K read)
I remember Stèphane's PET has the Business keyboard, so I probably need to program a 2716 with 901474-01.
I'll probably re-dump the 901447-24 ROM that was on the motherboard I sent to France and now has returned to me. It worked earlier this year and as all the other chips have survived two flights, it seems unfortunate if that one got wiped.
Alex
901465-01 AC = OK ($C000, Basic V2)
901465-02 AC = OK ($D000, Basic V2)
901465-03 ACE = Faulty ($F000, Kernal V2) (2532)
901447-24 ACE = OK ($E000, Editor V2 Graphics keyboard, no CRTC) (2716)
901447-14 AC = OK (Swedish character generator)
Again, I should try to redump the 901465-03 EPROM as it looks to be partly correct.
Here comes the most important part, checking Alex' original ROM set to figure out if he had a ROM problem or other motherboard fault which required him to get a new one:
901465-20 IT = OK ($C000, Basic V4)
901465-21 IT = Faulty ($D000, Basic V4)
901465-22 IT = Faulty ($F000, Kernal V4)
901465-23 IT = OK ($B000, Basic V4)
901447-29 IT = OK ($E000, Editor V4 Graphics keyboard, no CRTC)
901447-10 IT = OK (Character generator for both V2 and V4)
After closer inspection, bit 4 (00010000) is stuck on the 901465-21. The 901465-22 is partly good and partly bad. Again it could be worth taking another dump.
It means if Alex wants Basic V4 on his machine, I should burn him two 2532 to replace the bad ROMs. If he wants V2, I could include the 2532 already burned by Dave.
Any questions? Just let me know if anyone wants to see the dumps for themselves.