A number of interesting AIM 65 projects found on SM Baker’s github page (thanks Scott for the latest updates)
Backplanes
Designs for 2 and 3 slot backplanes. Gerbers included. AIM-65 display adapter board
This is a display board based on the RM65 display board.
Supports up to 512KB of onboard ROM, which will be addressed into the 24KB address space starting at 0x9000. The 0xA000 range is left
empty for onboard peripherals. The four-position dipswitch controls which 32KB segment of the 512KB ROM is mapped.
Multi-banked ROM file for display board
ROM image tools
tape-rs232-c1541
Application board for tape, RS232, and Commodore 1541 AH5050.
Christer from Sweden built an Eduardo Casino designed KIM-1 replica. And as we know, the 6530 replacement is an issue.
Not only for replica’s also for broken original KIM-1s.
So he designed his own, more compact original looking adapter.
He created this adapter because he wanted something that would work and look a little more unobtrusive than the other adapter boards that are available but still look somewhat genuine (no FPGA). The design is inspired by the Corsham 6530 replacement board but made way smaller by using SMD components and stacking the 6532 on top of the adapter board.
The 6530 and 6532 are very close in functionality.
Nearly the same timer, 2 8 bit I/O ports, RAM.
With an external ROM and some clever addressing logic many 6530’s have been replaced with a 6532.
Besides connecting a 6530 to a 6502 system, as is described in the other pages, a simple and effective test and ROM dump can be done with the wonderful Backbit Chiptester Pro V2.
This device van help detect problems with a large number of older ICs. And dump the contents of ROMs Especially the 65XX tests and ROM dumping have served me very well, e.g. the KIM-5 ROMs 6540 were read out with this device.
It can also check the 6530 RRIOT. My collection of 6530s has the KIM -002 and -003 and those tested fine. Initially the other 6530s tested with problems at Port 2 (the PB0-7 I/O pins).
Now port 2 is special since the mask programming allows to choose between CS1 and CS2 or PB5 and PB6.
The support of the Chiptester Pro is excellent and after some discussions with version CTPro-5.0.5 all 6530’s test fine. Alas the ceramic 6530-002 4576 has a defective ROM.
I have tested the following 6530’s
– 2x MOS MPS6530 002 0880 4576
– 1x MOS MPS 6530-003 0680
– 1MOS 6530-004 2576 and 5x SY6530-004 7935D
– 2x MOS 6530-005 3676 2876 and 1x R6530-005P 8114
– 1xR6530P 3004 -11 7925
– 3x MOS MPS6530 024 2081
Dave McMurtrie (Commodore History) has published a video showing how he dumped the ROM image of a 6530-009 (used in Applied Leisure devices)
By using the breadboard extension and the Corsham Clone 5 he wired the 6530-009 into the memory of the 6502, by interpreting the (general) 6530 datasheet as shown in the next screenshots.
A 6530 IC is to be used in a 6502 computer as standard 65XX peripheral.
Two of the tests on the next pages are breadboard tests on a KIM-1 (clone)>
The first test is the simplest and fastest: the excellent Backbit Chip Tester Pro for a test and ROM dumps
Udo Juerss minimized the original monitor written by Alois Nachtmann by removing the socalled “assembler”.
And added Intel Hex and MOS Technology papertape upload.. Furthermore some routines can be use in own programs like: TTY_INIT, TTY_PUTC, TTY_PUTS.
Udo Juerss minimized the original monitor written by Alois Nachtmann by removing the socalled “assembler”.
And added Intel Hex and MOS Technology papertape upload.. Furthermore some routines can be use in own programs like: TTY_INIT, TTY_PUTC, TTY_PUTS.
