Apple II

Original II Keyboard numbers out

Submitted by falter on April 1, 2014 - 5:18pm

Thanks to old_hitech, I now have enough keyswitches to put my keyboard back into full service. After desoldering and testing all keyswitches on my last outing, I had put all the iffy or bad ones on the bottom row for easy removal. I now have the entire bottom row done, and they work.. but now I have lost my 1, 2, 3, 4 7, 8 ans - keys. Looking at the traces thoae keys all share one trace on the keybside of the pcb. I thoughr maybe one of the replcement keyswitches were bad, and found my replacement left shift switch was shorting a bit.

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I'm looking for a contact for The Saltine

Submitted by Phil in York on April 1, 2014 - 3:55pm

Anyone know The Saltine?

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Trouble sending data with ADTPro

Submitted by chaimpeck on March 31, 2014 - 2:40am

I am using ADTPro with an Apple 2e and connecting to a MacBook that is running Windows inside VirtualBox.

I am able to bootstrap just fine. Additionally, when I "Send" the RAM disk, it goes nice and fast and copies everything.

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Disk zeroing utilities.

Submitted by Keatah on March 28, 2014 - 3:53am

Disk Zeroing utilities. Are there any for the Apple 2 series?

A Disk Zeroing utility works pretty much like it sounds. It looks at the un-used space on a disk and writes zeros. On the PC there are plenty of these utilities, sold under the premise they provide security and prevent data recovery & undelete.

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Apple II

Apple Disk II drive

Submitted by ervin1701 on March 27, 2014 - 2:46am

Does any one know or have a fiew good drive door/clamps for apple DiskII drives or a clone with the black thumb door like the disk II. Have 3 good working drives but the door clamp is broken.

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Motherboard Apple IIe 820-0064-00 with 4 names engraved

Submitted by JonathanFrance on March 25, 2014 - 5:46am

Hi,
I have a motherboard Apple IIe 820-0064-00 (so without A or B revision) and in addition, there are 4 names written in place of WFB:
rice, broedner, macphee, auricchio.
Could you tell me about this motherboard?

IMAGE(https://media.joomeo.com/large/5330a92604939.jpg)

IMAGE(https://media.joomeo.com/large/5330a94c603d3.jpg)

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Apple II

Apple IIe HAL equations in vhdl

Submitted by dvador on March 23, 2014 - 3:55pm

I found a file containing the equation for the Apple IIe HAL.

it is in a language I dont understand

do you know if the same file exist in vhdl ?
or is there any information on how to read the file (this is a small extract)

Pin #
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
14M 7M CREF H0 VID7 SEGB GR' CASEN' 80COL' GND ENTMG' LDPS' VID7M PHASE_1 PHASE_0 Q3' CAS' AX RAS' VCC

/RAS':=Q3'
+7M*/RAS'*/PHASE_0
+/7M*/AX*PHASE_0
+7M*CREF*AX*H0*PHASE_0
+/7M*/CREF*AX*H0*PHASE_0

apparently it's just simple equation using just not, and, or...

there is this description

DESCRIPTION:
'=not (inverted)
+=or (# in CUPL)
*=and (& in CUPL)
/=low (! in CUPL)

but it's not so clear, for example the signal on pin 19 is ras' but the the part of the equation is /ras

apparently it is easy to deduce the and / or but with the /signal signal' signal
the not seems comfusing

any idea ?

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Apple II

Come see a Rev-0 in the flesh at VCF east 9.1

Submitted by Corey986 on March 23, 2014 - 6:54am

As I'm finishing up my exhibit for VCF plans I realized some of you may be wondering what makes the Rev-0 so special and different than all the other Apple II that came after it and why do some of us just love the Rev-0. Sure it came first, but it's more than that...

Sure I'll be showing an Apple-1 replica next to a person bringing a real Apple-1.
Sure I'll be showing the Scelbi 8h replica that took me over a year to complete.

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Apple II

II+ Foil Keyboard H--l

Submitted by falter on March 22, 2014 - 7:30pm

Got the parts today that Corey was kind enough to send me (thanks Corey!!!). I decided to go in on my II+ foil tab keyboard. I hesitated initially because after repeatedly fighting it I had finally gotten it previously to a point where the only issues were a dead - key, a space that appeared after 3 was pressed, and a sometimes flaky D. But Corey was kind enough to send me a nice long foil strip so I thought I could pull it off.

Boy was I wrong.

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Apple II

Strange failure on apple IIe motherboard

Submitted by dvador on March 22, 2014 - 3:00am

Hi

I have 2 Apple IIe motherboard and a power supply

when I power the first board, the screen is cleaned and then the simple word "Ram:" is written on the top left corner...
nothing else. I deduced (I may be wrong) that the board is working but lack peripherals and specially a keyboard
(if I remove the 74LS154 decoding the IO I get "Apple II and a prompt"

on the second board, the screen is filled with little colored squares (I guess it's just low resolution) an nothing else.
if I put the rom of the previous board to this one, I columns on screen patterns containing '*'

apparently on of the set of eprom is enhanced the other set standard

any idea to what I should look to solve the problem of the board with the screen filled with colored squares ?

I try to swap many parts without real success...

any idea ?

thanks

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