Commodore C-128 Service Manual

17, READ ONLY MEMORY FOLD OUT SCHEMATIC SHEETS 3 AND 4, PAGES 66 AND 67, FOR EASY REFERENCE. In C64 mode, the operating system resides in 16K of ROM, which includes approximately 8K for Kernal and 8K for Basic. In C128 mode, the operating system resides in…

26, ---- .~-- THE MEMORY MANAGEMENT UNIT (Continued) Bits 4 and 5 are the GAME and EXROM sense bits, respectively, which are implemented as bidirec- tional ports as explained above. As inputs, they directly reflect the hardware cartridge control lines GAME and EXROM …

25, Commodore C-128 --------------~----~.---------------------------- THE MEMORY MANAGEMENT UNIT (Continued) MCR=$0505 o = l-80 Proc. Mode 1 = 8500 EXPR~SION .- 0= Input rSOIR 1 = Output IGRME Sense IEXROM Sense 05 Mode ? ~ §~~8 40/80 Sense Mode Configuration Register The Mode…

3, COMMODORE 128 GENERAL FEATURES 64 MODE 128 MODE CP/M MODE KEYBOARD INPUTS/OUTPUTS RECOMMENDED PERIPHERALS POWER REQUIREMENTS PERSONAL COMPUTER • Advanced Styling • 100% Compatible with Commodore 64 • Built-in, Easy to Use DOS support • RAM Expandable up …

18, READ ONLY MEMORY (Continued) Ne A12 A7 A6 A5 A4 A3 A2 A1 A~ O~ 01 02 GNO Ne A 12 A7 A6 A5 A4 A3 A2 A1 A~ O~ 01 02 GNO PIN CONFIGURATION 1 28 2 27 3 26 4 25 5 24 6 23128 23 7 ROM 22 8 21 9 20 10 19 11 18 12 17 13 16 14 15 …

15, MEMORY ARCHITECTURE (Continued) -----~ ~~ ___ .. _=;::;::I,A '" i .... ;;:;'" ... = 2;, "\::-t:l\t=l_ ;:):~: :~~E 0:; , • :: '(RC~ " ---~---~ r'_...: '" ~~:J . S _ - a ::e';~'J 1: ~e~,-::"…