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> AIM65 / aim 65 eprom for rockwell R6501 and/or R6511
AIM65 / aim 65 eprom for rockwell R6501 and/or R6511
with Rockwell's original licensed
(used on Rockwell AIM 65 Computers)
With R6501 Datasheet and AIM 65 User's-Manual on CD
The Rockwell R6501A is a complete, high-performance 8-bit NMOS-3 microcomputer on a single chip and is compatible with all members of the R6500 family.
The R6501A consists of an enhanced 6502 CPU, an internal clock oscillator, 192 bytes of Random Access Memory (RAM), and versatile interface circuitry.
The interface circuitry includes two 16-bit programmable timer/counters, 32 bi-directional input/output lines (including four edge-sensitive lines and input latching on one 8-bit port), a full-duplex serial I/O channel, ten interrupts, and bus expandability.
The innovative architecture and the demonstrated high performance of the R6502 CPU, as well as instruction simplicity, results in system cost-effectiveness and a wide range of computational power. These features make the R6501A a leading candidate for microcomputer applications.
Four new bit manipulation instructions:
Decimal and binary arithmetic modes
32 bi-directional, TTL-compatible I/O lines (four ports):
One 8-bit port may be tri-stated under software control
One 8-bit port may have latched inputs under software control
Two 16-bit programmable counter/timers, with latches
Internal pull-up resistors on Ports PA, PB, and PC
Full-duplex asynchronous operation mode
Selectable 5- to 8-bit characters
Synchronous shift register mode
Standard programmable bit rates programmable
Four edge-sensitive lines; two positive, two negative
Bus expandable to 64K bytes of external memory
2-MHz or 1-MHz internal operation
Internal clock with external XTAL at four times internal frequency
External clock input divided by one or four
1 S minimum instruction execution time at 2 MHz
NMOS-3 silicon gate, depletion load technology
12 mW stand-by power for 32 bytes of the 192-byte RAM
Application Help available. DATASHEET - http:// /AIM65/R6501.pdf (R6501.pdf, 2.65 MB)
I myself started in 1975 with the KIM (Keyboard Input Monitor) from MOS Technologies and used the KIM for my first projects, adding the I/O hardware to these boards and bipolar PROMs for the firmware.
When the first 65xx Onechip microcomputers came to the marketplace, I used these microcomputers, the R6501 and R6511, for my first own microprocessor boards. Later Rockwell produced the R65F11 FORTH microprocessor, which was used inside NASA space shuttle equipment. I transfered the AIM 65 and the R65F11 operating system under written personal license of Rockwell International to the R6511, using the
With this little AIM 65 operating system it is easy to test hardware and software without using expensive equipment like Incircuit Emulators. It is possible to download software assembled with a 6500 assembler with Rockwell Format to a R6501/R6511 board's RAM area.
It is even possible to develop small software modules with the onboard one pass 6502 assembler and analyze software with the onboard 6502 disassembler. This is helpful for hardware development and patching of existing 6502 firmware. You can byte wise change I/O memory cells simply by typing the desired new values using the monitor commands.
It is an amazing little great tool for software development using the R6501 or R6511.
