Apple iie memory map software

Using 6502 assembly language how anyone can program the apple ii by randy hyde a product of datamost, inc. I have a backup motherboard that works not enhanced, but i could swap the relevant chip set but i. Apple iie failing ram test the drams are one bit wide. The software library contains software disk images that can be. The remainder can be used by the apple iie, and the card and access up to 1 mb of memory on its host computer. If you are a new apple ii owner in 1991 and use any 8bit apple ii software at. Apple iie memory removal and replacement applefritter. Memory map to understand the memory layout of the apple ii. Compatible with most interface and expansion cards for the apple iiiie. The apple iie styled as apple e is the third model in the apple ii series of personal computers produced by apple computer. The difficult part of dhgr is that the memory map is all over the place. Memory map apple ii with applesoft basic loaded calla.

There are lots of ways to go about that, mostly depending upon the hardware you. The e in the name stands for enhanced, referring to the fact that. Get the best deals on apple iie vintage home computers and find everything youll need to improve your home office setup at. Apple iie technical reference manual part 2 applelogic. The iie card has 256 kb of memory, half of which is used for an apple iie rom image. The chart here uses information from apples apple ii technical references, beneath apple dos by worth and lechner, and exploring apple gsos and prodos 8 by little. To map those 40 column rows into memory sequentially would for various. The apple iie is arguably the most successful computer apple has ever produced. I already understand how screen memory is mapped on the apple iie, and how a particular byte will display a particular 7pixel pattern, so i dont need an explanation of that. As with the language card, the memory in the 80column card was bankswitched over the machines main ram. Since some programs used all 128k memory that could be present in a iie or iic, apple had given guidelines in one of their technotes on how to properly disconnect the 64k ramdisk which. Summary of apple ii monitor commands examining memory. Apple iie and bank street writer a vintage apple iie.

How much memory should i get if i want to try the graphical os in addition to running apple iie. Im not super familiar with apple ii hardware, so im not sure if it is the. Since the emulation software needs some sram for variables and data only 12kb remain for the emulated apple. According to the applesoft wiki memory managementuse if the system has more. While it will not improve the poor keyboard, the new apple writer ii, version 2. The iigs architecture mapped the screen data to memory bank 0xe0. But you need a way to get the data off the apple iie and onto a more modern platform. The computer apple ii own spelling apple or apple is one of the first single board computers and micro computers with housing. It had twice the ram, twice the rom, 80 column support and upper and lower case support built in.

Bsw was published by broderbund software and required 48k of memory. The cards generally operate the z80 at 46 mhz, but they do not have direct access to the apple ii. The iigs screen buffers listed are not where the hardware actually draws them from. The used atmega 1284p has a total of 16kb physical sram. Commandcontrolescape in apple iie mode brings up the apple iie control panel so that you can map slots and functions. Descriptions of memory areas jon relays apple ii info archives. Apple iie memory removal and replacement thanks for the info, transwarp ii guy. The internet archive software library is a large collection of viewable and executable software titles, ranging from. You can either type it in or use a terminal program that has a send file function and a serial port. Do you have a manuscript or software program related to per sonal computers. So, you can have a failure at a certain address, and the bit within the byte that is wrong points to the chip that has failed. Memory map free gps mapping software for pc, iphone. The apple iigs system software utilizes a graphical user interface gui very similar to that of the macintosh and.

A vintage apple iie with 5 14 inch duodisk drives running a 1980s word processing program, bank street writer. How much memory should i get if i want to try the graphical os in addition to running apple iie software. This works with a lot of accessibility software for the apple ii and some games. Get the best deals on apple vintage computer interface card and find everything youll need to improve your home office setup at. The first available apple ii computers came standard with 4k of memory, and more. Applications, utilities and general purpose software for the apple ii. Software library the primary purpose of any library is to preserve cultural relics and this software library is no different. User program rom version a2b0009x installed where xxx is maximum available ram memory. I dont like dram cabling type ram card i wanted stand alone card like the saturn. When an apple iie program starts to look for a mouse, or for any hardware that might normally be attached to or in an apple iie, special circuitry in the apple iie card stalls. It has 1 megabyte populated, and is automatically recognized by most versions of appleworks. Where is the best place to buy the memory upgrade for my rom1 system.

Highresolution graphics screen memory mapping i 263. Choose the amount to pay for your annual membership to the apple pugetsound program library exchange a. Below is a quickie memory map for a typical 64k apple ii which is, also, the main bank of a. The apple iie was a late replacement for the surprisingly long lived apple line. Basic programs load linearly into memory, and they cannot jump over memory regions. In discussing the memory map on the apple ii, we can refer to pages of. More of interest is which 12k it is addressing in the apple2 memory map. Iigs512krom 512k add on board with preloaded software. This space can be used for nonbasic programs and routines, too like stuff you brun or. Applesoft basic programs are loaded at 801h 2049 by default. When active, they communicate with 6502hosted software to perform io operations. All input and output in the apple ile is memory mapped. A few months ago, i had gotten an apple iie from a garage sale, but it turns out it doesnt read any disks. An easily accessed builtin software control panel lets you control.

Apple vintage computer interface card for sale ebay. A collection of historical software for apple ii computers from the 1980s and early 1990s. Applesoft basic has a function called fre which returns a value representing the free memory available. Apple2onlinestore the apple2onlinestore will be closed in celebration of the holidays 19 december29 december 2019. The apple iigs styled as iigs, the fifth and most powerful of the apple ii family, is a 16bit. The company apple built it from 19771993 in different. The internet archive software library is a large collection of viewable and executable software titles, ranging from commercially released products to public domain and hobbyist programs.