Tag: apple2
By J.A. BACKMAN If you have dumped a program by hitting “RESET” when you meant to hit “RETURN” and Ctrl-C wouldn’t bring the program back – – I’ll bet the air was as blue around your APPLE II as it was around mine! – ! – ! A sweet little fix is a simple gadget that stops accidental keying “RESET” but does not stop its operation when it is needed. It does not hide the key, and doesn’t require lifting…
Last issue I talked about the general specs of the PERSCI 277 eight inch floppy disk drive. This issue I want to discuss some of the uses for a floppy disc and why anyone would even want one. But first, let me digress. Since Apple has announced its own Disc II, why should I be telling you about the Persci floppy? Two reasons. 1) Computer Components announced its own floppy as available before Apple did, and 2) I’m using one…
As usual, we are down to the wire again as it comes time to write this column. We are still receiving applications from all over the country as we pass the 110 mark in membership, and we would also at this time like to extend a special welcome to our first overseas member, Paul Moortgat who lives in Nieuwkerken, Belgium! There are many special features for new members in this issue, and we would like to refer you to the…
MEMORY RANGE* DESCRIPTION ———————– —————————————- 0.1FF Program work space; not available to user. 200.2FF Keyboard character buffer. 300.3FF Available to user for short machine language programs. 400.7FF Screen display area for text or color graphics. 800. 2FFF APPLESOFT BASIC compiler. (Cassette Tape Version) 800. XXX User Program (ROM version – A2B0009X installed) where XXX is maximum available RAM memory 2000.3FFF High Resolution Graphics Display page 1. May be used by Ror-1 (A2B0009X) version of App1esoft II only. 3000. XXX User…
By Bob Huelsdonk Some protocol is a must if you use a printer with greater than 40 columns with your Apple. This comes about because it tries to write beyond the screen area and into the variables area in Integer BASIC or into the operating system in Applesoft. The following fix will help prevent this problem: Start your printer driver routine with a JSR FC58. This will home the cursor and clear the screen. Do not return to the screen…
The May 1978 Contact! newsletter from Apple Computer, Inc. contained a number of required patches to repair bugs in Applesoft I. Array Indexing Problem Fix Long line Fix “END” Statement Fix FRE(0) Function Fix
By Val J. Golding Applesoft & Applesoft II store in memory from the bottom up, unlike Integer BASIC, which is just the opposite, storing from the top down. Although pointers and characteristics of Applesoft I and II are similar, they are different. Therefore we will limit ourselves to APII in this discussion. Programs store startirlg at decimal location 12289 upwards, at’Id variables are located starting at the high end of program storage. Where there is no program present, theh the…
By Val J. Golding Is the ugly head of price wars and cut-throat sales about to raise itself? We sincerely hope not. these are bargains in which no one gains. If a dealer can move enough data in a given period of time, he can make money, even with a profit margin as low as 10%. But in order to do this, he must also cut overhead. This is usually accomplished through reductions in sales staff and services to customers. …
NOTE:Values 00 to 7F (0 to 127 decimal) are used by the standard Ascii character set. As in Integer BASIC, Apple II outputs last two rows (60-7F) as uppercase. This table is a complement to “Applesoft II Pointers and Tokens on Pages 6 & 7, and should be saved as a permanent reference chart.
COMPUTER COMPONENTS – formerly known as COMPUTER PLAYGROUND offers some large storage for Apple users in the form of PERSCI floppy drives. This is the first in a series of articles about the “large” floppies available for the Apple ][ The drive is the PerSci Model 277 dual diskette drive. this means it has two eight inch floppy disk surfaces with approximately 256,000 bytes for storage. Half a million bytes of disc storage per drive! optionally selectable is the dual…
We must thank Randy Wiggington of Apple Computer, Inc. for letting us bug him (no pun inteded) both by mail and by phone, and whose help was invaluable in helping to prepare the special Applesoft issue of Call-A.P.P.L.E Magazine (1978 June Issue)
By Darrell Aldrich While written for Applesoft II, this article is also applicable to Integer Basic HIRES graphics mode. The High Resolution Graphics screen is composed of 280 vertical bars (X coordinates), by 160 units high (Y coordinates). The even-numbered bars are violet in color, while the odd-numbered bars are green. The color white is produced by plotting adjacent green and violet bars. (Green+Violet=White. ) By plotting only on even bars, (even X coordinates), violet plots can be made. However,…
The Assembly Language classes are now scheduled to start June 1 at Empire Electronics. Cost $35 per persorn including Synertek manual. To sign up, call Tom Geer at (206)244-5200 or Don Williams at (206)242-6807. The course includes Number Systems, Boolean Algebra, 6502 Instruction set and Programming.
We will have available sometime within the next month the Applesoft II version of Programmers Workshop, with most of the same routines, Append, Renumber, Examine Basic, Pick a Base, Poke writer. Pricing has yet to be determined.
By Val J. Golding Here are simple routines that will allow you to append programs in both version of Applesoft. While appending can be done under program control in App. II, it is really simpler to do it without. The routines are the same in both versions; only the pointers have been changed (to protect the innocent!). A word of caution: Apple soft programs store in memory just the opposite of Integer Basic, i. e., from the bottom up. Therefore,…
We always look forward to writing this column each month, for a number of reasons. One is that since it is usually the last new material writtem ,it is this column that gives us an indication of the length of the current issue will run. Secondly, because we look at it as sort of “our own” column we feel free to let our thoughts wander a bit, and we feel this line sometimes will produce some interestbig material. In any…
By Don Williams One of the minor deficiencies in Apple Integer BASIC is the omission of the Data statement. In search of a remedy for this, I wrote a program to save memory in a BASIC string assignment. This is listed as program lines 1020 through 1190. Upon embarking on the first routine, I quickly found a second omission in the language; a way to store a non-string variable into a string, the remedy for which is shown as program…
by Dana Redington = Apple Computer, Inc. More word on the utility Rom. In addition to the routines previously mentioned, this Rom will have new high-res operating routines, including a SHAPGEN command that will eliminate the need to manually write HIRES vectors. You will be able to directly address a d0t matrix, and there will also be a HIRES Ascii character set, displayable concurrently with the graphics. The Applesoft Rom board is scheduled for release to dealers July I st…
The library is now assembling games and other applications into module form, 2 or three programs on a menu. So far, we have Gamepak I with Anne Apple, OneArm Bandit and an updated version of Zot!; No 2 contains Hurkle, Multiply and Biorhythm while “Programmers Workshop” is composed of Append, Examine Basic, Renunber, List by Page, Poke Routine Write’ and Pick a Base From… Blackjack Checkers and Craps will be in the next Gamepak, while other new programs include Appleodian,…
