diff --git a/README.md b/README.md index d20e94b..4775969 100644 --- a/README.md +++ b/README.md @@ -3,22 +3,21 @@ Library and demos for the Apple-1 TMS9918 video card by P-LAB. -# Building for the "Juke Box" EPROM expansion +# Building for the CodeTank/Juke-Box Expansion Cards -The demo contained in the repo are meant to be launched from the Apple-1 "Juke Box" -EPROM expansion at address $4000. The executables are built according to the +The demo contained in the repo are meant to be launched from the Apple-1 +"CodeTank" EEPROM daughterboard of the "Apple-1 Graphic Card" or "Juke-Box +Card" FLASH at address $4000. The executables are built according to the following memory map: -$0000-$00FF zero page: holds most of C program variables -$0280-$0FFF low RAM space: C program "Data" segment -$4000-$7581 EPROM (Juke Box): C program "Code" segment -$7582-$7FFF EPROM (Juke Box): C program "Data" segment (startup values) - -The build script "mkeprom.js" creates a 16K binary file to be placed on the -EPROM where the "Data" segment startup values are put at the end of the file itself. -The user program need to manually copy such data from EPROM to low RAM once after -the `main()` is launched. That can be easily done by simply calling the library -function `apple1_eprom_init()`. - +$0000-$00FF zero page: holds most of C program variables +$0280-$0FFF low RAM space: C program "Data" segment +$4000-$7581 EEPROM/FLASH (CodeTank/Juke-Box): C program "Code" segment +$7582-$7FFF EEPROM/FLASH (CodeTank/Juke-Box): C program "Data" segment (startup values) +The build script `mkeprom.js` creates a 16K binary file to be placed on the +EEPROM/FLASH where the "Data" segment startup values are put at the end of the +file itself. The user program need to manually copy such data from EEPROM/FLASH +to low RAM once after the `main()` is launched. This can be easily done by simply +calling the library function `apple1_eprom_init()`.