Tag: single step

2 matching upgrades

Showing 2 products.

Status Product What it does Compatibility Links

Status	Product	What it does	Compatibility	Links
AvailableChecked Jul 24, 2026	Dual Clock and Reset Moduleby Z80 Kits clock reset single step rc2014 standard bus enhanced bus kit	Adds selectable CPU and peripheral clock rates plus supervised power-on reset. Current kits include a 7.3728 MHz single-speed version and a multispeed version. A DS1233 reset monitor holds the CPU in reset while power stabilizes and a button provides manual reset. The optional manual clock switch is not supplied. Sources Z80 Kits Dual Clock page	RC2014 modular systems Stated family	Vendor product page Official module documentation
Find usedChecked Jul 30, 2026	HES MON 64by Human Engineered Software (HES) c64 cartridge machine language monitor debugger single step ram test 6502 development vintage	Vintage C64 machine-language monitor cartridge with assembly, debugging, memory, and relocation tools. ConsoleMAD listed one original cartridge-only unit at GBP 24 on 2026-07-30; it was missing its label. RavenWolf's tested USD 12 cartridge was sold out and had been recovered from a workshop with harsh long-term storage conditions. Treat every offer as an individual used item. The HES software and manual remain copyrighted, so this record does not present an unlicensed ROM download as a DIY route. Sources HES MON 64 original manual archive and full text ConsoleMAD HES MON 64 listing RavenWolf HES MON 64 listing	Commodore 64 Exact model	Read the HES MON 64 manual Check the ConsoleMAD used cartridge See the sold RavenWolf cartridge Search eBay for HES MON 64

AvailableChecked Jul 24, 2026

Dual Clock and Reset Moduleby Z80 Kits

Adds selectable CPU and peripheral clock rates plus supervised power-on reset.

Current kits include a 7.3728 MHz single-speed version and a multispeed version. A DS1233 reset monitor holds the CPU in reset while power stabilizes and a button provides manual reset. The optional manual clock switch is not supplied.

Sources

Z80 Kits Dual Clock page

RC2014 modular systems Stated family

Vendor product page Official module documentation

Find usedChecked Jul 30, 2026

HES MON 64by Human Engineered Software (HES)

Vintage C64 machine-language monitor cartridge with assembly, debugging, memory, and relocation tools.

ConsoleMAD listed one original cartridge-only unit at GBP 24 on 2026-07-30; it was missing its label. RavenWolf's tested USD 12 cartridge was sold out and had been recovered from a workshop with harsh long-term storage conditions. Treat every offer as an individual used item. The HES software and manual remain copyrighted, so this record does not present an unlicensed ROM download as a DIY route.

Sources

Commodore 64 Exact model

Read the HES MON 64 manual Check the ConsoleMAD used cartridge See the sold RavenWolf cartridge Search eBay for HES MON 64