ive been saying this.
commodore cut back so much it wasnt even funny. if the c64 would have included 1 isa slot it would have been the most phenomenal computer next to its "dumbed down" success. i say dumbed down because even at that time, the "inside" of the industry were already working on 256 colour machines, 16.8 million colour machines, and memmory regardless of cost didnt have to be burned clocked down, just like the processors were. look at the amiga, the 68k was put into many machines and was used in arcade machines all over the world, this to my belief was done to ruin its true value in success, take a look at the arcade aspect most of the 68k's were running at 50mhz, either as a 30 or as it self. then look at the clock value of the same processor in the 2000, its 14 mhz...... the point is, they clocked everything down and underrun it so much they wanted us to believe that what we were getting was a HUGE DEAL. it wasnt. im sure the 68k can clockup, not overvoltage(overclock) to a range of 100mhz easy without beginning to overheat. then take a look at memory capacity, it could have been burned(written) with instructions that allow it a greater capacity than they were allowing, thats what a C-MAT system does, it clocks chips and sets voltage ratings per clock percentage. the point is, the c64 was severely underrun for its time and was a huge success because of the SID chip. i believe.
the 128D was the computer that was supposed to be on the same level as the A500 and from what i understand was also to have included 4 isa slots, why didnt this computer see the light of day? it wasnt just poor planning, it was the fact that the processor level was severly under clocked from the 13-25mhz range. regardless of its type, take a look at the most peculiar aspect, commodore claims the 6502/6510 was only capable of handling 64k of memory, why is that the 128 handles 128k of memory? now, i believe it was handling all 128k, i also came to the conclusions they paged the kernal rom to allow it to handle 64k twice, and just accumulated. and further more, the 128d was also supposed to be a 286 of its type in range on that level with the ibm pc xt/at clones. also, one more thing i believe: the z80 is a 5mhz chip, there was a z80 on board the 128... it was clocked down to 1mhz. if they can clock them down and regulale voltage on an instruction set, they can be upclocked the same, contention kept in had the whole way through until overheating starts. the difference is set between needing a heat sink and requiring water cooling or a fan and heatsink combo. dont forge geos in vga mode now (resolution). same chip as the c64, more memory, same vic II chip. high resolution do to a simple instruction set on the board. all of which could have been granted to the c64 even through an rs-232 card. the point is, if the c128 can sit that high for a second, can you imagine what it would have been like to see an isa specific card mounting a 68k and more memory, the computer practically sits amiga. now what about a vampire card? the 6510/6502 sits in the same step next to the 68k. cant be that difficult to built an accelerator for the type. would be nice to see a new cell based gui for the type as well and a shell operated prompt bash or hash type as a main run operating system through kernal rather than basic. picture it. internal harddrive/internal 3.5/internal cd-rom/high resolution display(hopefully up to 1280x1400)/16.8 million colours and full stereo 16 bit sid (id love to see wavetable synthesis instead of patch/sample modding only) and i would love to see no disconnects from the main types, and i dont mean the chipset, i mean the vic and the sid, why not use the vic as a display type and instruct it to run at resoution chose and colour type, and the vampire run the 3d instructions. and as of the sid, why not just triple mount the sid or allow a boat mount from the card to the sid socket and just put the sid on board with option for a second sid, giving you 4 sid in amount once the sockets are filled. hey why not? no emulation on board for the sid. i just dont want to hear how a fpga is emulating the classic sounds of the commodore 64. just dump it like they do with everything else.
as you can see the major problem i have with commodore even though ive been a long time user of the c64 is the fact that its completely upgradeable with all of this potential and no one was done anything to even begin to think of moving it up to modern standards. and that new type is not a commodore 64. so none of that. and regardless if i have to expend externally or not, at least i can still do it the way it was to be done, bridge and mount bridge and mount each and every card from the main slot and make sure to rate for voltage along the way, every so many cards, time for a 5v include.or just get a case, mount it and run a patch cable from the rs232 to a board with slots, power the board from an atx power supply and be happy your c64 is now modernized.