On 1/21/19 1:49 AM, Jonathan Gevaryahu via vcf-midatlantic wrote:
On 1/19/2019 11:23 AM, Neil Cherry via vcf-midatlantic wrote:
On 1/19/19 9:06 AM, Duane Craps via vcf-midatlantic wrote:
...
6800 family, binary compatible 6800 - microprocessor
6802 - 128B of RAM, (microprocessor) 6808 - No ROM, No RAM (microprocessor)
6801 - ROM, RAM, IO (microcontroller) 6803 - RAM, IO, No ROM (microcontroller)
6809 - different microprocessor, mnemonic super set (not binary compatible) ...
I'll add a few entries to your 68xx cpu/mcu list:
6804 - different incompatible microcontroller from 6801, slow serial ALU, 64 byte RAM, 3 I/O ports with DDR, mask ROM only, very rare/obscure (made for only a year or two), cannot execute from RAM, this is usually lumped in with the 6805 as the 6805 was far more popular.
6805 - microcontroller, same opcode set/compatible with 6804, but with a fast parallel ALU, both mask ROM and EPROM (with self programming!) options, and can execute code from RAM; spawned the extremely successful 68HC05 and 68HC08 series later on.
Forgot about the 68HC08, I'm betting that the H8HC08 and the 6808 are not compatible.
68HC11 - microcontroller descendant of the 6809 but not binary compatible, much more powerful than the 68hc05 and 68hc08 series opcode-wise, but not as powerful as a 6809 or 68000. Has internal RAM, and either ROMLESS, Mask, EPROM or Flash ROM. This spawned the backwards-compatible (I think?) 68HC12 with added fuzzy logic opcodes and related features. These were popular in the automotive sector, as well as on some test equipment. The 68hc11 was also used on the MIT HandyBoard, a direct ancestor to the Lego RCX MindStorms bricks (the latter are H8/3292 based).
I don't have any 68HC12 boards but I have the 68HC11 eval board and several Handy boards (are they vintage yet?). BTW, the MC-10 arrived and started right up. The description about the marks on the computer are correct but not as bad as expected. 30+ years of being tossed around in storage seems to be on par for what's there. -- Linux Home Automation Neil Cherry ncherry@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies