Author: Bill Martens

To: Call-A.P.P.L.E. I purchased a set of 16K dynamic RAM from “Advanced Computer Products.”  They passed the memory test in a previous issue of this newsletter.  The price was eight chips for $200, with a six week delay waiting for their “same day shipment.”  Remember to have a set of three 14 pin sockets on hand for your memory select jumpers.  Thanks for telling how the HI-RES system handles the colors.  I wondered why my blue and green spaceships were…

Note: In line 400 after the first quote, hit the Control key and the “D” key at the same time. This is how the disk system responds to commands within a Basic program, with Control D in a print statement.

by John Covington Finally! !! Disk II is out. If you’re lucky, you will be able to play with one in your local computer store until yours arrives from Cupertino. That is what I have been doing this last week, and this article comes from using the disk and my varied background in Data Processing. Hopefully, I’ll be able to explain some of the HOWS and WHYS of the disk system and clear up some of the blind spots in…

Sorry to do this, but we underestimated both cost and demand on this mini-modem. For those that are unaware, Apple Box acts as an interface between your cassette and your telephone. After connecting it to an FCC type-approved telephone coupler, it allows you to transmit or receive programs over telephone lines. This requires the ability to monitor your line, and if your recorder is not so already equipped, Apple Box II at $23.50 will do it for you.

Apparently, quite a few. You can look forward in the near future to receiving a questionaire in connection with your medical and other applications for Apple II. It would seem that about 10% of our current membership is in the profession, and our objective is to put this large minority in contact with one another. You will also be receiving names and addresses. This also will apply to any other special interest group; we will attempt to put you in…

By Bob Huelsdonk When inputting to a double loop by row, then jumping out to a double loop to total by column, it is necessary to revers the subscript order. This will not work in Applesoft BASIC because the right counters do not reset.  The following simple example will demonstrate: 80 PRINT  “INPUT ‘-1’ TO TERMINATE INPUTS” 100 FOR R = 1 TO 3 120 FOR C = 1 TO 3 140 INPUT A(R,C) 160 IF A(R,C) = – 1…

By Bob Huelsdonk Only line 30001 is required for less than 32K of Memory.  The first GOTO 30000 shows result with  greater than 32K of Memory. The second GOTO 30000 shows the result with less than 32K of memory. 30000 IF PEEK (203)>128 THEN 30002 30001 PRINT PEEK (202)+ PEEK (203)*256- PEEK (204)- PEEK (205 )*256;” BYTES FREE”: END 30002 PRINT 32767-( PEEK (204)+ PEEK (205)*256);” BYTES + “; PEEK (202)+( PEEK< (203)-128)*256 +1;” BYTES FREE”: END >GOTO 30000 30719…

Much of this issue of Call-A.P.P.L.E. was done 0n our own Apple II Computer, nobly assisted by an Integral Data IP-225 printer, along with our own modification of Phil Roybal’s Lower Case Character Generating Program (See Contact, May, 1978) The IP-225 has performed beautifully,  and because you can software-select eight different type fonts, It is ideal for this task.  We believe the smallest available type face, which we are using here, is easily readable, and it contributes further by making…

Sorry to say, many of the “corrected” versions of LPak lA still have a bad copy of Program 8. If you are ordering Library Pak 2 and ask us with your order, we will add program 8 from Library Pak la to your tape. The main reason for this was simply our lack of time to check the tapes. Forgive?

Fees for 1979 will be $2.50 Apple-cation fee {new members only} plus $7.50 dues. Those members who have already renewed at the prior rate will not be charged the new rate. New members paying for the first time after September 1 st will not be required to pay 1978 dues. Membership cards are being mailed with this issue. If you are current and have not received a card, please let us know.

Library Pak 1B $ 5. 00 Library Pak 2 $ 5.00 Programmers Workshop II $ 6.00 Disk Workshop $ 6.00 Integer Basic Tutorial $ 15.00 Danny’s Text Editor $ 45.00 Apple Box {mini-modem} $ 18.50 Apple Box II (with speaker) $ 23.50 Applesoft Workshop {watch for notice} Programs submitted to our library and accepted will receive a free library Pak.

We are fairly current on filling orders at this time. All orders received prior to July 15th should have been filled. If you do not receive your tape within 30 days, please check with us. However, we have every hope of being able to handle a 10 day turnaround time.

Currently, only the July issue is available. We plan to reprint April, May and June as time and money permit. If you have not received the back issue you want, please send a self-addressed envelope and 41 ¢ postage, along with the issues you desire. We will fill the orders, but it may take quite some time.

By Mike Thyng In the previous articles, we’ve discussed types of files – sequential and random – and general facts and figures about the PERSCI floppy disk drive. This issue I’d like to explore some of the actual commands necessary to get data to and from the diskettes. Before you can write a file, you have to do something called “opening” it.  This defines to your program that some related data – let’s say names and addresses – is going…

18 July 1978 Meeting began promptly at 7:16. We again introduced ourselves in Lynnwood OMEGA’s meeting room and found 41 members attending. Tom Geer, who is recovering from a broken leg, sent word that he orders his APPLE hardware directly from APPLE in California and dispelled any contrary rumors that had been circulating. We’ve got about 800 dollars in the treasury and most of it is committed to prior obligations. Ron and Darrell Aldrich have been busy working on a…

A pencil, scratch pad and you – that’s all you need to convert HEX TO DECIMAL, or DECIMAL TO HEX. Based on the fact that unit, ten, hundred, and thousand columns have a unique set of values for hexadecimal, the above table will assist you convert either way. This remainder equals 8 in the LSB column, and. HEX(8). So, the HEX number for 14632 is,3928. This might seem cumbersome, but it is surprising how rapid this conversion can become with…

by Darrell Aldrich This is a brief description of the use of the color mask byte (Location 81210) for high re solution graphics in Apple Integer Basic. This mask specifies an 8 bit pattern of plottable X coordinates, with the pattern repeating itself every eight coordinates, going from left to right. The bits in this byte represent the colors violet and green, alternately. (See Figure 1). Suppose we want to mask off every other green bar on the screen as…

The following section covers use of the Apple II mini-assembler only. It is not a course in assembly language programming. The following section assumes the user has a working knowledge of 6502 programming and mnemonics. The Apple II mini-assembler is a programming aid aimed at reducing the amount of time requir.ed to convert a handwritten program to object code. The mini-assembler is basically a look-up table for opcodes. With it, you can type mnemonics with their absolute addresses, and the…