Apple II

Franklin ACE 1000 character ROM image?

Submitted by cryu on February 16, 2021 - 9:10pm

Hello.  This is my first time posting, although I've been browsing the forums for a few years.

I'm resurrecting a Franklin ACE 1000.  All of the EPROMs appear to be okay, with the exception of the character generator ROM.

It appears to be a "Power Case" ROM, burned onto a white '97 Intel C2716.  It appears to be dying with random bit flips.

I've found exactly one reference to this ROM, and no extant dumps.  Would anyone happen to have an image of this?

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Apple II

MCL65+ 6502 Drop-In CPU Accelerator for Apple II

Submitted by MicroCoreLabs on February 14, 2021 - 7:43pm

Hi,

 

I thought I would share one of my recent projects, the MCL65+,  which is a drop-in 6502 CPU replacement board which can run either cycle accurate or in an accelerated mode. It uses a Teensy 4.1 microcontrtoller board which is similar to an Arduino, except much faster (600Mhz).

 

The MCL65+ PCB contains the Teensy and the required voltage-level buffers using through-hole logic to make it inexpensive and easy to produce.

 

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Apple II

Apple IIe Platinum motherboard recap?

Submitted by AlgAppl84 on February 14, 2021 - 10:32am

Hi 

 

 I've just recapped the PSU on my Apple IIe platinum and I was wondering if I should also replace the axial caps on the motherboard? If so where can I get them at a good price since they are very hard to find and not cheap.

 

 

Thanks

Paulo

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Apple II

Possessed ][+ Mainboard

Submitted by Timelord on February 14, 2021 - 7:13am

Here's an anecdote to take to the bank. I have a Rev D ][+ board that was previously damaged and malfunctioned. A while back, I restored it, tested it, did a full burn in, RAM tests, the lot, and it passed them all. I put it into a static bag and put it on a shelf. 

 

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Apple II

5.25" drive works w/ADTPro but not GS/OS

Submitted by djc6 on February 13, 2021 - 4:46pm

I purchased a model A9M0107 5.25" drive off of eBay for my ROM03 IIGS. I've used ADTPro via serial to successfully write several disks, but GS/OS cannot read them. I'm using a box of Dysan 5.25" disks new old stock, shrink wrapped. Double sided, Double Density.

 

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Apple II

Best Openings for Micro-Chess 2.0; what is its ELO?

Submitted by Timelord on February 13, 2021 - 3:51am

I have been experimenting with some modern openings with Micro-Chess 2.0, that tend to work very well with live play, but the software (from 1980) shocked me in finding creative logic branches to defeat or to blunt them.

 

I am curious if anyone has ever proven its ELO (per IQ setting) and what the best openings to use against its logic tree tend to be. 

 

As far as I am aware, and the manual supports this, the user can never play as black, so this rules out some options. 

 

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Apple II

Possible Apple IIe spanish ROM.

Submitted by Ramirofv on February 12, 2021 - 8:28pm

Hi everybody!I recently bought an Apple IIe with the "keyboard switch" underneath, spanish keyboard and -I guess, help me if I'm not correct- SPANISH video and keyboard ROM's. They are labeled "341-0155 revB" for the keyboard and the video ROM is "341-0165 revB" and is mounted in a small daugther board called "AIIE LANGUAGE ADAPTER" (820-094-A).

I would love to contribute this ROM's to the community since -and then again, this is a guess since I'm not expert-, I can't find any mention of them on the web, so I'm under the idea that are unusual or at least rare.

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Apple II

Hot DRAMs

Submitted by Mr.Fix on February 12, 2021 - 8:03pm

Hey all, i have a apple 2+.  I am having an issue with the onboard DRAM on the motherboard.  I have noticed that all DRAM banks are heating up.  I have checked voltage at PSU, and they are within voltage spec (+-5,+-12).   I have tested the DRAMS with APEX diagnostic software and the results are the DRAMs are good (no bad chips). I have taken out all the DRAMs from the motherboard and filled up first bank, and this entire bank is heating up.  Any ideas on what to check?

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Apple II

2716 Char EPROMs

Submitted by Timelord on February 9, 2021 - 5:28am

I seem to recall that 2716 char EPROMS worked on some revisions of the ][/+ mainboards. Which revisions support that? I do not recall offhand what was changed in the char ROM pimnouts.

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Apple II

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