Message: If you have a ram board from me sold before september 14. 2018, your board probably has a malfunctioning RAM controller. It can be fixed by reflashing the CPLD using 6-pin pogo pins and whatever tools you use for Xilinx CPLDs. I have no guide for the process now.
Jedec files and other info: http://www.mklboards.fi/ram68k
None available, 22.2.2024
Special offer: get a new old stock MC68HC000P10 or MC68000P12 CPU with the board free.
0 pcs v69 available. Price 50€/board + shipping + possible paypal fees. . E.g. untracked 100g shipping 5€ Europe / 10€ world
3 pcs lot with registered mail shipping 150€ (none available)
Socket strips with longer pins. The thinnest part is 3.125mm long, probably makes good contact without popping out of mainboard cpu socket.
Old info for older boards:
Options for config out, in, or ram on even without autoconfig( use addmem program)
v59 was 40€
2 pcs v59 blank pcbs with postage was 10€
A500, A1000, A2000, (CDTV with addmem-command OR hacking autoconfig signal from or to mainboard?).
v59 cpld config signal options: "O582" out (drives led for indication), old version in "I582", new config in version with ram always enabled regardless of autoconfig ".583" to use with autoconfig or addmem-command, to be made.
Also 4meg config options by programming the cpld code via jtag.
V58/59 doesnt need riser socket, when placed on top of v402/418 style ide boards, but it maybe tight with the polarising tab of idc cable connector or maybe not fit with boxed ide header.
About dram refresh:
To refresh, the cpld uses cas before ras refresh when 68000 address strobe(/AS) is negated. I dont know if 68010 will release /AS in loop transfer mode? Refreshing can be delayed perhaps.
Old V40,42,43 with 5 volt dram,: V42 with 3.3v xc9572xl, 5v 4m x 16 edo dram, v40 5volt parts
Combination with v4x ram, v402 ide board requires a riser socket in between the boards.
Ide v402 low profile and v4x ram wont attach to each other directly. Cpld chips "collide" preventing complete insertion. Ram on top will not fit because of ideconnector. Riser socket adds height.
part list for v43 pcb
edo dram KM416C4104 (suffix can be 'C')
XC9572XL tqfp-100 (tq/tqg100) (
regulator LM3480 - 3.3 volt (i have some for sale if needed)
led size 1206 (or 0805) + 330 ohm series R 1206
connectors. pin headers (not necessary).
64 pcs 'socket pins' (I bought new one at aliexpress, search mx cherry led)
capacitor notes in picture at mklboards.fi
Jedec files and other info: http://www.mklboards.fi/ram68k
None available, 22.2.2024
Special offer: get a new old stock MC68HC000P10 or MC68000P12 CPU with the board free.
0 pcs v69 available. Price 50€/board + shipping + possible paypal fees. . E.g. untracked 100g shipping 5€ Europe / 10€ world
3 pcs lot with registered mail shipping 150€ (none available)
Socket strips with longer pins. The thinnest part is 3.125mm long, probably makes good contact without popping out of mainboard cpu socket.
Old info for older boards:
Options for config out, in, or ram on even without autoconfig( use addmem program)
v59 was 40€
2 pcs v59 blank pcbs with postage was 10€
A500, A1000, A2000, (CDTV with addmem-command OR hacking autoconfig signal from or to mainboard?).
v59 cpld config signal options: "O582" out (drives led for indication), old version in "I582", new config in version with ram always enabled regardless of autoconfig ".583" to use with autoconfig or addmem-command, to be made.
Also 4meg config options by programming the cpld code via jtag.
V58/59 doesnt need riser socket, when placed on top of v402/418 style ide boards, but it maybe tight with the polarising tab of idc cable connector or maybe not fit with boxed ide header.
About dram refresh:
To refresh, the cpld uses cas before ras refresh when 68000 address strobe(/AS) is negated. I dont know if 68010 will release /AS in loop transfer mode? Refreshing can be delayed perhaps.
Old V40,42,43 with 5 volt dram,: V42 with 3.3v xc9572xl, 5v 4m x 16 edo dram, v40 5volt parts
Combination with v4x ram, v402 ide board requires a riser socket in between the boards.
Ide v402 low profile and v4x ram wont attach to each other directly. Cpld chips "collide" preventing complete insertion. Ram on top will not fit because of ideconnector. Riser socket adds height.
part list for v43 pcb
edo dram KM416C4104 (suffix can be 'C')
XC9572XL tqfp-100 (tq/tqg100) (
regulator LM3480 - 3.3 volt (i have some for sale if needed)
led size 1206 (or 0805) + 330 ohm series R 1206
connectors. pin headers (not necessary).
64 pcs 'socket pins' (I bought new one at aliexpress, search mx cherry led)
capacitor notes in picture at mklboards.fi
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